Back up lights

[Robin97396]

Back to your original question, mine is a '97 but would likely be similar.

[Moose]

Thank you for pic. The #11 fuse is good on mine.

I have the Allison AT545 transmission could I get more info on the transmission pressure switch

[frenchbean]

[cadillackid]

A is the reverse switch, B is your electronic Transmission Modulator. it looks like an AT545 transmission.
-Christopher

[frenchbean]

On A, the wires appeared to be okay. What would I find if I unscrewed the switch? Any surprising components inside, that I might not be able to put back together?

Thanks so much in advance!

[cadillackid]

is there not a connector a few inches up on that? if you unscrew that switch you'll have transmission fluid coming out.. and DONT START the truck with it out and press or reverse or you would SPRAY fluid everywhere..

if you pulled it out, and key on but not running.. and are able to measure 12 volts across the 2 wires of that switch (at its plugin) then you have a short to ground downstream of the switch.

I believe that switch is on the positive side.. I dont have the diagrams handy for that but if I remember right its on the + side..

-Christopher

[frenchbean]

Thanks Christopher.

I didn't see a connector. I'll crawl back underneath in the morning to check further up (pretty hhard with a broken rib!)