Need wiring/electrical help 07 Z06
Thread Starter
Cruising
Joined: Nov 2011
Posts: 11
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Need wiring/electrical help 07 Z06
Hello all,
I am going to be diving into a 07 z06 that a very good friend of mine has this Tuesday, and i was hoping to get some insight prior to Tuesday from you all if possible.
First,history. This car purchased as a shell, it had been hit in the front, and the motor was sold off for a hot rod project. My good friend owns a body shop, and he purchased the car to repair for himself. Here is a picture of the car as it was purchased.
After a bit of hunting, a second totaled Z06 was found, this was hit in the rear, and front clip and motor were all intact. as you can imagine, 2 became 1, and here is the result.
.
So, now we get to the problem. everything looks good, drum roll please, key in car, clutch in, hit the start button, hope it fires, and no bueno duh duh duh...... no start!
After a little troubleshooting what we found is when you push the start button, we are blowing the "PCM 15" fuse on the interior fuse panel. We swapped PCM's just to rule that out, and had the same issue.
All we have were for schematics is alldata, which is not very intuitive. I would love to get a set of 07 GM service manuals for the car, but even if i order them today with the holiday there's no way to get it by Tuesday. From what i can see on alldata, that fuse runs through the start button and the clutch safety switch. If anyone with service manuals could look into this for me, that would be wonderful.
I know this is a long shot, but are the service manuals available online anywhere?
And lastly, one more question. When you enter the vehicle, the dash and everything lights up, when you hit the start button, the dash goes out temporarily, the lights back up. I assume this is normal, to allow max power to the starter but just wanted to make sure, is this the case?
Anyways, thanks in advance for any help that may come our way!
I am going to be diving into a 07 z06 that a very good friend of mine has this Tuesday, and i was hoping to get some insight prior to Tuesday from you all if possible.
First,history. This car purchased as a shell, it had been hit in the front, and the motor was sold off for a hot rod project. My good friend owns a body shop, and he purchased the car to repair for himself. Here is a picture of the car as it was purchased.
After a bit of hunting, a second totaled Z06 was found, this was hit in the rear, and front clip and motor were all intact. as you can imagine, 2 became 1, and here is the result.
.So, now we get to the problem. everything looks good, drum roll please, key in car, clutch in, hit the start button, hope it fires, and no bueno duh duh duh...... no start!
After a little troubleshooting what we found is when you push the start button, we are blowing the "PCM 15" fuse on the interior fuse panel. We swapped PCM's just to rule that out, and had the same issue.
All we have were for schematics is alldata, which is not very intuitive. I would love to get a set of 07 GM service manuals for the car, but even if i order them today with the holiday there's no way to get it by Tuesday. From what i can see on alldata, that fuse runs through the start button and the clutch safety switch. If anyone with service manuals could look into this for me, that would be wonderful.
I know this is a long shot, but are the service manuals available online anywhere?
And lastly, one more question. When you enter the vehicle, the dash and everything lights up, when you hit the start button, the dash goes out temporarily, the lights back up. I assume this is normal, to allow max power to the starter but just wanted to make sure, is this the case?
Anyways, thanks in advance for any help that may come our way!
Tech Contributor
Joined: Oct 1999
Posts: 41,058
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From: Charlotte, NC (formerly Endicott, NY)
Probably not going to be much help as the AllData stuff is copied from the GM Book. With the advent of electronic manuals you can't find a clear schematic anymore. They are all chopped up so they can relate to the specific area being viewed. Here is the SM schematic for the fuse you mentioned:
HTD SEAT/WPR RLY, GMLAN RUN/CRNK, ECM, SDM/AOS SWTCH AIRBAG, TCM/TRANS, and ABS/MRRTD Fuses
CLSTR/HUD, EXH MDL, DR LCK, HVAC/PWR SND, CTSY/LAMP, ISRVM/HVAC, CRUISE SWTCH Fuses, and RUN CRNK Relay
Ignition Mode Switch
A/C COMP, PT INPUT/ETC, O2 SEN, MAN TRAN SOL, EMISSION, ODD INJ, EVEN INJ Fuses, and POWERTRAIN IGN1 Relay
BATT3, STOP/B/U/LAMPS, BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, TONNEAU RELSE, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS Fuses, and BCK/UP LAMP Relay
This schematic ties into the second since it has the BCM power connection with the triangle marked B for J208.
I don't see anything that would make it any easier unless the ECM fuse (marked as PT Input) shown in schematic number 4 causes the other fuse in the BCM to blow if it is already blown.
With all of the damage it is easy to believe that the wire going from the BCM to the ECM may be shorted to ground directly or indirectly through another circuit due to a damaged wiring harness. Everything goes right through where there was a lot of damage.
Power flow to the BCM is from Batt 3 in schematic 5 to J208 in schematic 2 to run crank relay bus in schematic 1, to the ECM in schematic 1. Power goes from the BCM to the ECM in the ignition mode switch schematic as well. So you have 3 places shown where the PCM gets power. There could be an issue due to one of those places not getting power and causing the other side to short out. Some analog circuits will do this. If both rails are not powered at the same time the circuit shorts and in this case that could take out a fuse. Just guessing but stranger things have been known to happen.
PS: What happens if you don't push the clutch in and just push the top of the On Button so you power up the ignition without starting the car? Does the fuse blow then?
Bill
HTD SEAT/WPR RLY, GMLAN RUN/CRNK, ECM, SDM/AOS SWTCH AIRBAG, TCM/TRANS, and ABS/MRRTD Fuses
CLSTR/HUD, EXH MDL, DR LCK, HVAC/PWR SND, CTSY/LAMP, ISRVM/HVAC, CRUISE SWTCH Fuses, and RUN CRNK Relay
Ignition Mode Switch
A/C COMP, PT INPUT/ETC, O2 SEN, MAN TRAN SOL, EMISSION, ODD INJ, EVEN INJ Fuses, and POWERTRAIN IGN1 Relay
BATT3, STOP/B/U/LAMPS, BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, TONNEAU RELSE, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS Fuses, and BCK/UP LAMP Relay
This schematic ties into the second since it has the BCM power connection with the triangle marked B for J208.
I don't see anything that would make it any easier unless the ECM fuse (marked as PT Input) shown in schematic number 4 causes the other fuse in the BCM to blow if it is already blown.
With all of the damage it is easy to believe that the wire going from the BCM to the ECM may be shorted to ground directly or indirectly through another circuit due to a damaged wiring harness. Everything goes right through where there was a lot of damage.
Power flow to the BCM is from Batt 3 in schematic 5 to J208 in schematic 2 to run crank relay bus in schematic 1, to the ECM in schematic 1. Power goes from the BCM to the ECM in the ignition mode switch schematic as well. So you have 3 places shown where the PCM gets power. There could be an issue due to one of those places not getting power and causing the other side to short out. Some analog circuits will do this. If both rails are not powered at the same time the circuit shorts and in this case that could take out a fuse. Just guessing but stranger things have been known to happen.
PS: What happens if you don't push the clutch in and just push the top of the On Button so you power up the ignition without starting the car? Does the fuse blow then?
Bill
Last edited by Bill Dearborn; Nov 24, 2011 at 02:01 AM.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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The top drawing does not show the Clutch position switch tapped into that 15A ECM fuse. The ECM and the CP switch are running on that 15A fuse.
Elmer
Elmer
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Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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Hello all,
I am going to be diving into a 07 z06 that a very good friend of mine has this Tuesday, and i was hoping to get some insight prior to Tuesday from you all if possible.
First,history. This car purchased as a shell, it had been hit in the front, and the motor was sold off for a hot rod project. My good friend owns a body shop, and he purchased the car to repair for himself. Here is a picture of the car as it was purchased.
After a bit of hunting, a second totaled Z06 was found, this was hit in the rear, and front clip and motor were all intact. as you can imagine, 2 became 1, and here is the result.
.
So, now we get to the problem. everything looks good, drum roll please, key in car, clutch in, hit the start button, hope it fires, and no bueno duh duh duh...... no start!
After a little troubleshooting what we found is when you push the start button, we are blowing the "PCM 15" fuse on the interior fuse panel. We swapped PCM's just to rule that out, and had the same issue.
All we have were for schematics is alldata, which is not very intuitive. I would love to get a set of 07 GM service manuals for the car, but even if i order them today with the holiday there's no way to get it by Tuesday. From what i can see on alldata, that fuse runs through the start button and the clutch safety switch. If anyone with service manuals could look into this for me, that would be wonderful.
I know this is a long shot, but are the service manuals available online anywhere?
And lastly, one more question. When you enter the vehicle, the dash and everything lights up, when you hit the start button, the dash goes out temporarily, the lights back up. I assume this is normal, to allow max power to the starter but just wanted to make sure, is this the case?
Anyways, thanks in advance for any help that may come our way!
I am going to be diving into a 07 z06 that a very good friend of mine has this Tuesday, and i was hoping to get some insight prior to Tuesday from you all if possible.
First,history. This car purchased as a shell, it had been hit in the front, and the motor was sold off for a hot rod project. My good friend owns a body shop, and he purchased the car to repair for himself. Here is a picture of the car as it was purchased.
After a bit of hunting, a second totaled Z06 was found, this was hit in the rear, and front clip and motor were all intact. as you can imagine, 2 became 1, and here is the result.
.So, now we get to the problem. everything looks good, drum roll please, key in car, clutch in, hit the start button, hope it fires, and no bueno duh duh duh...... no start!
After a little troubleshooting what we found is when you push the start button, we are blowing the "PCM 15" fuse on the interior fuse panel. We swapped PCM's just to rule that out, and had the same issue.
All we have were for schematics is alldata, which is not very intuitive. I would love to get a set of 07 GM service manuals for the car, but even if i order them today with the holiday there's no way to get it by Tuesday. From what i can see on alldata, that fuse runs through the start button and the clutch safety switch. If anyone with service manuals could look into this for me, that would be wonderful.
I know this is a long shot, but are the service manuals available online anywhere?
And lastly, one more question. When you enter the vehicle, the dash and everything lights up, when you hit the start button, the dash goes out temporarily, the lights back up. I assume this is normal, to allow max power to the starter but just wanted to make sure, is this the case?
Anyways, thanks in advance for any help that may come our way!
Rick,
I have the Helms manuals and you can refer to them if you like. I also have the Helms DVD and that can be referenced too. Both are the same. The schematic I supplied you is different than the top drawing in this reply.
If you want to look at the manuals, stop by the house. My library is open to all that need it.
Elmer
Thread Starter
Cruising
Joined: Nov 2011
Posts: 11
Likes: 1
Rick,
I have the Helms manuals and you can refer to them if you like. I also have the Helms DVD and that can be referenced too. Both are the same. The schematic I supplied you is different than the top drawing in this reply.
If you want to look at the manuals, stop by the house. My library is open to all that need it.
Elmer
I have the Helms manuals and you can refer to them if you like. I also have the Helms DVD and that can be referenced too. Both are the same. The schematic I supplied you is different than the top drawing in this reply.
If you want to look at the manuals, stop by the house. My library is open to all that need it.
Elmer
Tuesday i will be starting on this one, it really should not be to hard to find, but you never can tell with wiring.
I still need to know, is it normal for the dash to go out when start is pressed on these cars? I assume yes, but just want to be certain
Melting Slicks
Joined: Sep 2008
Posts: 2,360
Likes: 59
From: San Jose California
You are correct, this shouldn't be to hard to track down. Blowing that fuse means that the BCM recognized your start request and toggled the run/crank relay.
I would start with ohming out those two wires to see if either is going directly to ground.
DJ
I would start with ohming out those two wires to see if either is going directly to ground.
DJ
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Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Thanks Elmer, im gonna guess the first schematic that was posted was for an auto, hence no clutch switch.
Tuesday i will be starting on this one, it really should not be to hard to find, but you never can tell with wiring.
I still need to know, is it normal for the dash to go out when start is pressed on these cars? I assume yes, but just want to be certain
Tuesday i will be starting on this one, it really should not be to hard to find, but you never can tell with wiring.
I still need to know, is it normal for the dash to go out when start is pressed on these cars? I assume yes, but just want to be certain
AND the drawing does not differentiate between A6 or M6. That connection for the clutch switch is in all drawings and is labeled "active" if the M6 is in the car. It should have been there on the drawing.
Elmer
Last edited by eboggs_jkvl; Nov 24, 2011 at 02:09 PM.
Thread Starter
Cruising
Joined: Nov 2011
Posts: 11
Likes: 1
Well after i spent the day shooting wires, i believe we found the problem. All the wires checked out good, and the fuse would not blow when that circuit was energized and the ECM was unplugged. As soon as the ECM is plugged in, the fuse pops. Logic says replace the ECM which we did, and still had the same problem.
This got me to thinking about the differences in an 07 and 08 Z06, while the z06 did not have many changes, the base model Vette did, (LS2 to LS3). I called up our local dealer to see if the engine harnesses from an 07 z06 and an 08 z06 were same part number, low and behold they are not. So, we have mated a 08 z06 LS7 and engine harness to an 07 Z06 body, and body harness. While the plugs are the same, and they do plug up, the 08 engine harness is not compatible with an 07 car.
We now have an 07 engine harness on order, will have it in a couple days, pretty confident this should fix it.
This got me to thinking about the differences in an 07 and 08 Z06, while the z06 did not have many changes, the base model Vette did, (LS2 to LS3). I called up our local dealer to see if the engine harnesses from an 07 z06 and an 08 z06 were same part number, low and behold they are not. So, we have mated a 08 z06 LS7 and engine harness to an 07 Z06 body, and body harness. While the plugs are the same, and they do plug up, the 08 engine harness is not compatible with an 07 car.
We now have an 07 engine harness on order, will have it in a couple days, pretty confident this should fix it.
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Thread Starter
Cruising
Joined: Nov 2011
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Well after i spent the day shooting wires, i believe we found the problem. All the wires checked out good, and the fuse would not blow when that circuit was energized and the ECM was unplugged. As soon as the ECM is plugged in, the fuse pops. Logic says replace the ECM which we did, and still had the same problem.
This got me to thinking about the differences in an 07 and 08 Z06, while the z06 did not have many changes, the base model Vette did, (LS2 to LS3). I called up our local dealer to see if the engine harnesses from an 07 z06 and an 08 z06 were same part number, low and behold they are not. So, we have mated a 08 z06 LS7 and engine harness to an 07 Z06 body, and body harness. While the plugs are the same, and they do plug up, the 08 engine harness is not compatible with an 07 car.
We now have an 07 engine harness on order, will have it in a couple days, pretty confident this should fix it.
This got me to thinking about the differences in an 07 and 08 Z06, while the z06 did not have many changes, the base model Vette did, (LS2 to LS3). I called up our local dealer to see if the engine harnesses from an 07 z06 and an 08 z06 were same part number, low and behold they are not. So, we have mated a 08 z06 LS7 and engine harness to an 07 Z06 body, and body harness. While the plugs are the same, and they do plug up, the 08 engine harness is not compatible with an 07 car.
We now have an 07 engine harness on order, will have it in a couple days, pretty confident this should fix it.
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Joined: Sep 2007
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
Too bad I didn't notice this thread earlier.
The 07 and 08 wiring harness has 2 wire pinout differences and you could have swapped those pinouts. Did it on mine except mine was 08 with 07 engine harness.
1 wire was in the harness at the #72 pin in the ECM plug and the other was at the underhood fuse block X3.
Mine had the same symptom. Push the start button and everything shut down. Took about 8 seconds then everything returned to normal until the button was pushed again.
Need to make sure you have the right underhood fuse block as 07 and 08 are different.
The 07 and 08 wiring harness has 2 wire pinout differences and you could have swapped those pinouts. Did it on mine except mine was 08 with 07 engine harness.
1 wire was in the harness at the #72 pin in the ECM plug and the other was at the underhood fuse block X3.
Mine had the same symptom. Push the start button and everything shut down. Took about 8 seconds then everything returned to normal until the button was pushed again.
Need to make sure you have the right underhood fuse block as 07 and 08 are different.
Thread Starter
Cruising
Joined: Nov 2011
Posts: 11
Likes: 1
Too bad I didn't notice this thread earlier.
The 07 and 08 wiring harness has 2 wire pinout differences and you could have swapped those pinouts. Did it on mine except mine was 08 with 07 engine harness.
1 wire was in the harness at the #72 pin in the ECM plug and the other was at the underhood fuse block X3.
Mine had the same symptom. Push the start button and everything shut down. Took about 8 seconds then everything returned to normal until the button was pushed again.
Need to make sure you have the right underhood fuse block as 07 and 08 are different.
The 07 and 08 wiring harness has 2 wire pinout differences and you could have swapped those pinouts. Did it on mine except mine was 08 with 07 engine harness.
1 wire was in the harness at the #72 pin in the ECM plug and the other was at the underhood fuse block X3.
Mine had the same symptom. Push the start button and everything shut down. Took about 8 seconds then everything returned to normal until the button was pushed again.
Need to make sure you have the right underhood fuse block as 07 and 08 are different.
Supporting Vendor
Joined: Sep 2007
Posts: 11,216
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
After about 2.5 hours and not seemingly making any progress I opted to just rePin my 07 harness and it's worked perfect ever since.
Got really good money for that 08 harness though...
Thread Starter
Cruising
Joined: Nov 2011
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I LOL'd when I saw the book call for 9 hours to install the engine harness with engine in the car.
After about 2.5 hours and not seemingly making any progress I opted to just rePin my 07 harness and it's worked perfect ever since.
Got really good money for that 08 harness though...
After about 2.5 hours and not seemingly making any progress I opted to just rePin my 07 harness and it's worked perfect ever since.
Got really good money for that 08 harness though...
The good news is the car started last night!Thanks for the input about the fuse box, i had the owner order one a couple days ago just in case it didn't start once we finished up the harness. Swapping the harness took care of the fuse blowing, but the car still did not start. So we swapped the fuse box and it cranked right up, Was really great to hear it run for the first time!
Supporting Vendor
Joined: Sep 2007
Posts: 11,216
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
I had a no crank situation. Re-pinned the ECM connector and went to a crank but no start. Found that we had to change a wire in the fuse block then we had crank and running.
My friend that was helping me out and I just looked at each other in absolute amazement. It took about a minute or so to realize that it really was running.
It is a great feeling.
Congrats on getting that part squared away.
My friend that was helping me out and I just looked at each other in absolute amazement. It took about a minute or so to realize that it really was running.
It is a great feeling.
Congrats on getting that part squared away.
