Author Topic: Where is the back-up light switch located?  (Read 6977 times)

Offline dc7432

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Where is the back-up light switch located?
« on: December 29, 2013, 05:36:06 PM »
Where is the backup light switch located? Does anyone have a picture of it thanks

Offline hatzie

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Re: Where is the back-up light switch located?
« Reply #1 on: December 29, 2013, 05:43:56 PM »
Auto and three on the tree switches are on the base of the steering column inside the cab.

4 speed is on the transmission.

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Offline Boone83K10

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Re: Where is the back-up light switch located?
« Reply #2 on: January 01, 2014, 09:17:47 PM »
Where is the backup light switch located? Does anyone have a picture of it thanks

the BU switch is part of the neutral safety switch. it is at the base of the steering column right up against the firewall. there will be two wires running to it and two wires running from it. A DK BLUE wire that runs over to the fuse panel at the TURN B/U fuse position. A LT GREEN wire that will run over to the bulkhead connector. This LT GRN wire runs all the way back to the rear harness plug and then to the lamp sockets. It powers the BU light bulbs. It will also have a PURPLE wire that runs to the hazard flasher on the fuse panel and a YELLOW wire that runs up to the ignition switch.

Here is what I would check and in this order.

- check grounds in engine bay and behind left tail light.
- check TURN B/U fuse it could be broken near end and you can't see, steal another fuse to test for function
- check wiring connections on neutral safety switch
- swap hazard flasher with turn signal flasher or vice versa to see if that fixes it
- get a test light, connect to a ground then probe LT GREEN wire on bulkhead connector inside engine bay (see picture below) when you put in reverse.. bulb should light, if so continue on (if not then you know the problem is inside the cab)
- use test light and probe light green socket at rear harness connector (should be right at driver side frame rail where spare tire mounts). if test light comes on then continue (if not then you have a wire problem somewhere between bulkhead connector and rear harness)
- use test light and probe post on socket, if light comes on then continue (if not then check for corrosion in lamp socket, clean accordingly)
- check bulb filament and also for proper bulbs in the correct socket (a single post bulb in a two post socket and vice versa)

you can use the test light to confirm brake light/running light operation the same way by probing the other wires at bulkhead/rear harness plug. Brown for running lamps, DK Green for passenger side brake/turn, Yellow for driver side brake/turn.


Rear wiring harness bulkhead connection
[upload the image if it is yours, the source doesn't allow linking -admin]

Fleetside tail lamp wiring
[upload the image if it is yours, the source doesn't allow linking -admin]


and I just noticed I posted this info earlier in the thread... oh well
« Last Edit: January 02, 2014, 08:41:27 PM by Captkaos »
1966 Mercury Comet - Built 429 (First Car/Show Car)
1983 Chevrolet K10 - Built 350 (Winter Toy)
1992 Chevrolet Lumina Euro (Sold @ 265,000 miles)
2003 Ford Escape 4x4 - Mac Perf. Intake/Exhaust (Wifes' DD)
2007 Mercury Milan - Steeda Tuned (Summer Toy)

Offline Irish_Alley

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Re: Where is the back-up light switch located?
« Reply #3 on: January 01, 2014, 10:49:01 PM »
boone with gm square you have to be logged in to see the pictures
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Boone83K10

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Re: Where is the back-up light switch located?
« Reply #4 on: January 02, 2014, 09:15:15 PM »
Funny because they are from my computer

 

1966 Mercury Comet - Built 429 (First Car/Show Car)
1983 Chevrolet K10 - Built 350 (Winter Toy)
1992 Chevrolet Lumina Euro (Sold @ 265,000 miles)
2003 Ford Escape 4x4 - Mac Perf. Intake/Exhaust (Wifes' DD)
2007 Mercury Milan - Steeda Tuned (Summer Toy)

Offline Irish_Alley

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Re: Where is the back-up light switch located?
« Reply #5 on: January 02, 2014, 11:06:51 PM »
idk when i right clicked on them and copied the url it went straight to gm square
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Captkaos

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Re: Where is the back-up light switch located?
« Reply #6 on: January 03, 2014, 01:48:51 AM »
Took me there too along with a few others