Back up light switch problem
Thread Starter
Banned Scam/Spammer
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From: Fort St John B.C
Back up light switch problem
I did search and read every thread.
To make a long story short, I shorted out at one of the reverse light sockets. I bought a new switch (tranny) and it did nothing. I bought a new relay (#38 under hood) Still nothing.
They come on with the FOB, I put a test light to both switches and nothing.
Is there something Im missing?
TIA..
To make a long story short, I shorted out at one of the reverse light sockets. I bought a new switch (tranny) and it did nothing. I bought a new relay (#38 under hood) Still nothing.
They come on with the FOB, I put a test light to both switches and nothing.
Is there something Im missing?
TIA..
Team Owner
Joined: Jul 2006
Posts: 22,140
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From: Kannapolis NC
I don't see any fuse for reverse lights in the passenger fuse panel, but the manual shows fuse #21 in the underhood box feeds the voltage to the back up light switch and also the park interlock, will your car come out of park with the switch off? If so, the fuse may be blown. I'd take a look at it anyway. Also depending on how you shorted it, you may have melted a wire somewhere. Post what you find.
Team Owner
Joined: Jul 2006
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From: Kannapolis NC
My service manual shows #21 fuse underhood to feed both manual and auto b/u light switches. 10 amp. I'm looking at a 2003 manual, I don't have a fuse wiring diagram for earlier models.
My mistake, I do have a schematic for 99 6spd. It shows #21 fuse, 10a, underhood fuse box feeding the power to the b/u lights for both manual and auto. The approach lights when you press the fob come through a different fuse, didn't make note of which, so I'd try one in 21.
My mistake, I do have a schematic for 99 6spd. It shows #21 fuse, 10a, underhood fuse box feeding the power to the b/u lights for both manual and auto. The approach lights when you press the fob come through a different fuse, didn't make note of which, so I'd try one in 21.
Last edited by 65GGvert; May 18, 2007 at 12:48 AM.
Thread Starter
Banned Scam/Spammer
Joined: May 2006
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From: Fort St John B.C
I just checked my fuse box under hood.....there nothing there for #21,20,25 and 26. All blank.
And thank you for your help so far 65GGvert
And thank you for your help so far 65GGvert
Last edited by clayton1; May 18, 2007 at 01:26 AM.
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Team Owner
Joined: Jul 2006
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From: Kannapolis NC
It's gotta be getting 12v somewhere. The manual says #21. I'd take the plug off the tranny and measure for continuity between the two tranny contacts when in reverse with switch on. Or you could short between the two contacts in the plug you pulled off with switch on and b/u lights should come on. If they do, it's either the switch or the part in the tranny that slides over the ball on the switch is not hitting it correctly. Any possibility you got the wrong switch and it's not going into the tranny far enough to make contact? First try shorting the two wires on the wire side connector w/switch on to eliminate wiring issue.
Team Owner
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From: Kannapolis NC
Hey Clayton1, I just noticed a mistake in my last post. If you're measuring continuity on the tranny contacts, you don't need the switch on. It should read zero ohms (app) when in reverse and open in any other position. Sorry bout that. You will need the switch on if you're shorting the plug side connectors to get the lights on, though. If you don't have 12v on one of the two wires (brown according to the manual diagram) then shorting the two won't get you lights and you'll have to go the other way to find out where you're losing power.
Last edited by 65GGvert; May 18, 2007 at 02:01 AM.
Thread Starter
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From: Fort St John B.C
Roger that 65',
And Mr Couture, If you know where that fuse is Id like to know please, I looked a few times and my manual says nothing about a reverse fuse there.
Thanks
And Mr Couture, If you know where that fuse is Id like to know please,
I looked a few times and my manual says nothing about a reverse fuse there.Thanks
Thread Starter
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From: Fort St John B.C
Well, I tried shorting the two wires ( they are brown and grey) And i got no lights.
Doesnt look good for me.
(Oh , and I still havent found that back up light fuse in the pass. fuse box)
I wonder where the brown wire goes if the grey wire goes to the relay.
Doesnt look good for me.
(Oh , and I still havent found that back up light fuse in the pass. fuse box)
I wonder where the brown wire goes if the grey wire goes to the relay.
Last edited by clayton1; May 18, 2007 at 09:34 PM.
Team Owner
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From: Kannapolis NC
According to the diagram, the brown wire goes to the 12v supply and should have 12v on it any time the ignition switch is on. If you have any way to measure, do that. If not, apply 12v to the gray wire and see if your b/u lights come on. If you're applying the voltage from an external source (ie: battery) don't forget to ground the negative to the chassis somewhere. Best bet is measure the brown wire with voltmeter with ign. sw on and look for 12v. I don't know where it comes from, that manual says what I told you before about the fuse under hood that you say is blank on yours. How did you originally short your b/u light socket?
Thread Starter
Banned Scam/Spammer
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From: Fort St John B.C
Ok, Ill try getting 12v to that wire, And i took a picture of the fuse bo and the manual so to back up that im not crazy.
And I was checking to see if my test light still worked its old and beat up, so put it in the light socket....
And I was checking to see if my test light still worked its old and beat up, so put it in the light socket....
Intermediate
Joined: Feb 2004
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From: Howell NJ
Reverse Lamps
Clayton1,
IF you use the key FOB and the backup lights come on, then the #38 micro relay and the 15A appraoch fuse in the underhood fuse panel is good.
If the reverse lights don't come on when the stick is in reverse, the first culprit and common fault is the backup light switch mounted on the transmiisson. When it fails it becomes internally grounded and when this happens it blows the #21 backup lamp fuse in the passenger compartment footwell.
Most of the times when the backup lights don't come on the fault lies with the backup switch. To check the wiring, you can short the contacts in the backup switch connector. If all circuitry is good the lamps should light. Let me know how you make out. PM me if you want.
IF you use the key FOB and the backup lights come on, then the #38 micro relay and the 15A appraoch fuse in the underhood fuse panel is good.
If the reverse lights don't come on when the stick is in reverse, the first culprit and common fault is the backup light switch mounted on the transmiisson. When it fails it becomes internally grounded and when this happens it blows the #21 backup lamp fuse in the passenger compartment footwell.
Most of the times when the backup lights don't come on the fault lies with the backup switch. To check the wiring, you can short the contacts in the backup switch connector. If all circuitry is good the lamps should light. Let me know how you make out. PM me if you want.
Last edited by Rapidtransit; May 19, 2007 at 01:00 PM.
Thread Starter
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From: Fort St John B.C
Ok well,
I hooked up a piece of wire to a fuse and ran to the brown wire on switch, the lights came on.
For the fuse box under pass kick panel, my book says fuse #21 is "Brake-Transmission Shift Interlock". To me that doesnt mean anything to do with reverse lights.
I thought I checked every fuse in there too.
Anyways, I dlike to thank everyone for their help, I appreciate it
And yes I do feel like somewhat of a moron.
I hooked up a piece of wire to a fuse and ran to the brown wire on switch, the lights came on.
For the fuse box under pass kick panel, my book says fuse #21 is "Brake-Transmission Shift Interlock". To me that doesnt mean anything to do with reverse lights.
I thought I checked every fuse in there too.
Anyways, I dlike to thank everyone for their help, I appreciate it
And yes I do feel like somewhat of a moron.