Can anyone tell me how to locate the backup lights relay? I have no reverse lights. The ground wire at the bulb is grounded but the positive wire is not getting juice. The 15 amp fuse at the box under the driver side is good.
I have a lame Chilton manual that says it's located either in the driver's side junction block (is that the fuse box?) or the engine compartment relay block. I can't find anything that looks like the image in the book.
BTW, is there another fuse for the relay? and, how do I test the relay if I ever find it?
Thanks in advance

 

Oh, it's a '93 T100

 

OK I found the flasher relay just above the pedals. Does this dub as a reverse relay? It's got the same colored wire Red w/blue stripe going to it as the bulb in the rear. Flashers work just fine though.

 

Looking at the wiring diagram, you should be in the right place, looking on the kick panel on the drivers side. If it is a manual transmission though, try disconnecting the reverse light switch on the side of the transmission and jumping the connector. If the reverse lights come on, you have a bad switch.

 

Check your reverse switch on the transmission. It should have 12v with the key on. And when in reverse it sends 12v to the rear lights.

 

Looking over my 1993 T-100 FSM, the 10A Gauge fuse is what provides power to the reverse switch.
Page EWD-13

 

I have the same issue in my 93. I picked up some new led bulbs (www.pfranleds.com) because the old ones were useless. They just came in and I realized the old ones werent useless they just werent getting power.

Ill check the reverse switch on the tranny (fuses all seem to be fine).

Did you get yours working?