My truck is an '89. Not sure now similar it is to yours.
There's a cluster of wires on the drivers side frame rail close to the cross member behind the transmission. A pair of wires for the air dryer (242/239), a single wire for power to the backup switch (242), and a single wire for an aux trans temp sender (241). I'm using the 241 wire for trans temp in stead of the 59 wire on the engine harness since it leads better.
I found all this when I was rewiring the air dryer. The single 242 wire was led to it and power to the reverse switch was coming off the starter solenoid. There's a single wire to the back for the reverse lights, I haven't found a wire in the original harness that is supposed to be used for that but I also haven't gotten too far into that part of the wiring. I'm redoing the engine harness at the moment.
Reverse lamp
Discussion in 'Trucks [ Eighteen Wheelers ]' started by rank, May 9, 2018.
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Turns out there was a switch in my trans. It just looks a little different than I thought it would more like a vent lol
@wore out @GrapeApeLast edited: May 15, 2018
Heavyd, snowman_w900 and Tug Toy Thank this. -
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Reverse lamp installed. Found a All in one LED as suggested by @GrapeApe and @Luwi67. got the transmission switch suggested by @Hogleg from the local truck parts store and wired it From a keyed breaker on the panel like he said. Thanks to all that replied and sleep well tonight knowing that the world is a safer place now that I’m compliant with 393.1. Thank you too Officer Spak*
Tug Toy, Heavyd, snowman_w900 and 1 other person Thank this. -
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