Yeah I know, it looks nasty. Actually this is my 78' and I ran a bunch of extra wires for MSD, electric fan, gages etc. and it got out of hand. Gotta neatin it up someday.
1970 Backup circuit cabling
Thread Starter
Instructor
Joined: Sep 2007
Posts: 244
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From: Long Island
1970 Backup circuit cabling
I have a 70 that didnt have the backup light switch etc mounted onto the transmission (m21). I have purchased all of the components, switch,bracket,screws,levers etc. My main problem is finding where the wires from the switch go? Are the wires part of the cabling under the car (and if yes,where?) The switch came with a long lead. Does it go up through the tranny tunnel and connect to a "mate" in the console?
*PS* When I remove the two screws on the side the cover to mount the bracket, will I lose alot of tranny fluid? Will the gasket get compromised?
Thanks in advance, this is a great forum !
*PS* When I remove the two screws on the side the cover to mount the bracket, will I lose alot of tranny fluid? Will the gasket get compromised?
Thanks in advance, this is a great forum !
Le Mans Master
Joined: Mar 2001
Posts: 6,640
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From: Ann Arbor Michigan
The mating connector is in the engine compartment and comes through the firewall on the drivers side. See photo. It's the pink/green wires. Don't recall if the bolt holes go all the way through the trannie, but even if they do, you won't loose much fluid.
Last edited by Duke94; Sep 23, 2007 at 10:23 AM. Reason: Add another photo
Thread Starter
Instructor
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From: Long Island
Duke thanks so much for the reply. I'll look for the mating connector. The guy that restored the car was a stickler, so I'm sure its just a matter of finding it. He put insulation in the tranny tunnel and I'm just hoping its not under that. Thanks !
Thread Starter
Instructor
Joined: Sep 2007
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From: Long Island
Wasn't able to find the mating connector. The cabling is all taped and wrapped. The lead from the backup light switch is about 17-18" long so I dont think it would reach all the way to the engine compartment and then up to the mating connector. Any other ideas ? Thanks
Le Mans Master
Joined: Jan 2007
Posts: 5,485
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From: Peekskill NY
Look for a black L shaped connector. My tranny switch is also missing and will be doing the same thing, but the wires & connector are luckly there.
Keep searching. Also look at the wire routing in the AIM.
Keep searching. Also look at the wire routing in the AIM.
Drifting
Joined: Aug 2007
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Le Mans Master
Joined: Mar 2001
Posts: 6,640
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From: Ann Arbor Michigan
The cable from the BU switch should be about 27" long. The mating connector wires come from the center console (left side). Remove the small console extension and you should see the harness like this. The one I'm holding is the BU light wires that then go up through a grommet in the firewall. Sounds like someone snipped your off.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
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From: Ann Arbor Michigan
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Thread Starter
Instructor
Joined: Sep 2007
Posts: 244
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From: Long Island
The cable from the BU switch should be about 27" long. The mating connector wires come from the center console (left side). Remove the small console extension and you should see the harness like this. The one I'm holding is the BU light wires that then go up through a grommet in the firewall. Sounds like someone snipped your off.
Thread Starter
Instructor
Joined: Sep 2007
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From: Long Island
GD70 - you found your "L" connector in the engine compartment just past the firewall?
Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan
The wire comes up along the floorboard and toe kick then plugs into the "L" connector coming out of the firewall as shown in my first picture..
Race Director
Joined: Apr 2003
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From: Tampa, Florida
Before you plug in the switch use a 'jumper' in the connector to check for proper lighting of the reverse lights.
I got my lights operational first then I plugged in the connector. It was alot easier than getting in and out of the car and throwing it in and out of reverse.
I got my lights operational first then I plugged in the connector. It was alot easier than getting in and out of the car and throwing it in and out of reverse.
Thread Starter
Instructor
Joined: Sep 2007
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From: Long Island
Duke, I was finnaly able to get to install this. B/U light light and then fuse burns out. Checked green wire coming from car side and it tests as ground. Is this correct ?
Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan
Le Mans Master
Joined: Oct 2005
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From: Glen Allen, VA
I did exactly what Jim2527 said. For some reason the switch on my 79 4 spd is also missing. I jumped the wires coming out of the firewall and voila, backup lights lit up for the first time since I bough the car 2 years ago. The point was to make sure the DID work. I found the connector on mine off of a Lectric Limited poster size wire diagram.
Thread Starter
Instructor
Joined: Sep 2007
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From: Long Island
Here's the schematic of the BU circuit. The green wire goes to the bulbs THEN to ground. You should not be showing a path to ground at the connector. Check for short in the green wire to the back of the car. The wire is in the rear harness and goes along the left rocker panel under the carpet.