71 tcs/cec help!!!!!!
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Joined: Sep 2005
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From: Woodbridge VA
71 tcs/cec help!!!!!!
I am trying my best to set the car up as original, but I am having a problem with the TCS/CEC system. Does anyone know the proper TCS/CEC system for the 71?
I have the right solenoid on the carb, the TCS switch on the trans, the two relays on the firewall, and all the wiring is correct. I am having a problem trying to determine if I need the temp sender in the right hand head. I have a single black wire connector behind the right hand head, but not sure if this is for the jumper wire that goes to the sender.
Any help would be appreciated!!!!
Hunter
I have the right solenoid on the carb, the TCS switch on the trans, the two relays on the firewall, and all the wiring is correct. I am having a problem trying to determine if I need the temp sender in the right hand head. I have a single black wire connector behind the right hand head, but not sure if this is for the jumper wire that goes to the sender.
Any help would be appreciated!!!!
Hunter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Yes you need the temp sender in the head. It is different from the gauge sensor. There is a green jumper wire that connects into a dark blue wire on the firewall. This is from my 72 manual. Iwould think 71 is the same. The temp sensor is a 2 wire sensor also.
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
Although there are differences between your 71 and my 72 the basics should be the same.
You should have a single black wire with a weather proof boot running to the tcs switch on the transmission, a dual spade lug temp sensor on the right head with the lugs at an angle to each other.
The jumper wire for the temp sensor is green and should plug into a harness connector with a blue wire hanging down behind the right head. One terminal on the temp sensor is a low temp (below 82 degrees) position and the other is a high temp (232 degrees) position.
cc
You should have a single black wire with a weather proof boot running to the tcs switch on the transmission, a dual spade lug temp sensor on the right head with the lugs at an angle to each other.
The jumper wire for the temp sensor is green and should plug into a harness connector with a blue wire hanging down behind the right head. One terminal on the temp sensor is a low temp (below 82 degrees) position and the other is a high temp (232 degrees) position.
cc
Team Owner
Joined: Sep 2006
Posts: 31,230
Likes: 4,324
From: Westminster Maryland
Hi Hunter,
The CEC system for 71 is different than the TCS system used in 70 and72.
The best explaination on how it works that I've seen is in the EMISSION CONTROL SYSTEMS section of the CHASSIS SERVICE MANUAL, page 6T-2. There's a good diagram that shows how the various parts are wired and a description of how the system is supposed to work.
If you don't have the Manual sure should consider getting one.
Regards,
Alan
The CEC system for 71 is different than the TCS system used in 70 and72.
The best explaination on how it works that I've seen is in the EMISSION CONTROL SYSTEMS section of the CHASSIS SERVICE MANUAL, page 6T-2. There's a good diagram that shows how the various parts are wired and a description of how the system is supposed to work.
If you don't have the Manual sure should consider getting one.
Regards,
Alan
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Here is an article on the TCS system. It starts on page 4.
http://ncrsrmc.org/Downloads/Mar-2006-Newsletter.pdf
http://ncrsrmc.org/Downloads/Mar-2006-Newsletter.pdf
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
The wiring to that 2-lug temp switch (Rik's Corvette Parts carries it, by the way) is pretty odd looking. The single green wire runs to one spade connector and then another piece of green wire is run from that same spade connector to the other one. The short 'jumper' wire is about 3-4" long. Apparently, the TCS circuit is not supposed to function if the engine temp is too cold OR too hot.
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Thread Starter
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Joined: Sep 2005
Posts: 83
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From: Woodbridge VA
7t1vette,
I think the wire that goes to the temp switch was removed, but I found a green wire with a connector at the fire wall. I check with an ohm meter and it seems to go to the relay. Does the jumper wire that connects to the temp switch have a single wire connector at the fire wall? Any ideas of where to get the chassis service manual?
Hunter
I think the wire that goes to the temp switch was removed, but I found a green wire with a connector at the fire wall. I check with an ohm meter and it seems to go to the relay. Does the jumper wire that connects to the temp switch have a single wire connector at the fire wall? Any ideas of where to get the chassis service manual?
Hunter
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
7t1vette,
I think the wire that goes to the temp switch was removed, but I found a green wire with a connector at the fire wall. I check with an ohm meter and it seems to go to the relay. Does the jumper wire that connects to the temp switch have a single wire connector at the fire wall? Any ideas of where to get the chassis service manual?
Hunter
I think the wire that goes to the temp switch was removed, but I found a green wire with a connector at the fire wall. I check with an ohm meter and it seems to go to the relay. Does the jumper wire that connects to the temp switch have a single wire connector at the fire wall? Any ideas of where to get the chassis service manual?
Hunter
cc
Thread Starter
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Joined: Sep 2005
Posts: 83
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From: Woodbridge VA
I took a picture of the wire that I think goes to the CEC temp senor on the passenger side head. Any comments?
http://www.facebook.com/editphoto.ph...6&id=804694603
http://www.facebook.com/editphoto.ph...6&id=804694603
Racer
Joined: Oct 2008
Posts: 278
Likes: 5
From: illinois
I'm in the same situation as HunterPayne. I have diagrams. but, there's still confusion. would be a real asset if someone could post pics to actual setup and wire colors. I'd also like to see the connection at the drivers side solenoid and where the wire comes from as well as color. My wiring is a mess. thanks
Thread Starter
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Joined: Sep 2005
Posts: 83
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From: Woodbridge VA
I am glad that I am not the only one with this problem. It is a real pain in the butt!!!! I have mine all straight except for the passenger side sensor. I can let you know what colors go where. My wiring is pretty good. Follow this link. It is the correct wire diagram that I tried to blow up, but you can still follow it.
http://www.facebook.com/editphoto.ph...4694603&ref=mf
http://www.facebook.com/editphoto.ph...4694603&ref=mf
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
My '71 SB, auto, w/A/c has a single green wire going to a 'Packard' connector at the firewall/right side. The green wire going to the TCS temp switch (between cylinders #5 & #7) hooks up to that "Packard' connector.
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
I took a picture of the wire that I think goes to the CEC temp senor on the passenger side head. Any comments?
http://www.facebook.com/editphoto.ph...6&id=804694603
http://www.facebook.com/editphoto.ph...6&id=804694603
cc
Last edited by CCrane65; Mar 9, 2009 at 11:32 PM.
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
Yes
Mine with same spec. has the same, one green wire connected to the passenger side switch