I have a new truck camper and found the the 30 amp maxi fuse was blown , Its been replaced with a new one,
Been looking at the owners manual and there are relays which the reverse one was missing , its been replaced
All other lights ,Tail,Running,turn and brake lights work.....
its just the reverse lights on the truck camper i can't seems to find the reason there is no voltage when in reverse , there is revere lights on the truck and they work
Hooked up the camper to my brothers truck and reverse light work
so i know they work
Back two the owners manual there is a 30 amp maxi, i THINK 2 half relays has i think is what there called been replaced and checked
I have also 12 volts for the charging system for the camper that it works as well, its just these reverse light i cant seem to figure what ford is doing here
I bought new relays and there is a 20 mini or reg fuse that i guess is in the current path
Thanks is advance
John

 

anyone know what the colors are for the reverse light wiring ? just wondering

 

You are going to need to specify which fuse numbers you are posting about.

The 30A could be the trailer tow adapter Maxi fuses #101 or #108.
- 101 is the battery charge relay feed, 108 is the trailer brake controller.

the trailer tow adapter reversing lamps is a 20A std fuse, #5 in the Battery Junction Box ( AKA BJB / under hood fuse panel ).

BJB Fuse #5 feeds the trailer tow reversing lamp relay, terminal #3

The normally open terminal #4 feeds the trailer tow adapter reversing lamps on the Black /w light green stripe wire.

The trailer reverse lamp relay coil is ground on terminal #2 and to the trucks reverse lamps on terminal #1. This is closes the relay's normally open contacts when the truck's reverse lamps are on.

Which 1/2 size Ford relay did you change, and how did you test it ?
- The trailer tow adapter reverse lamp relay is the half size under the horn relay and fog lamp relay. that row it is the 2nd from the right ( far right in that row is the WOT relay ).

 

Is there two different circuits one for the truck reverse light ?
and one for the tow 7 pin plug ?
I got it working by using ? jumping on the reverse lights wire
I ran it to the center pin on the 7 pin plug
sorry it was a 30 amp maxi it was blown,,,,, replaced the relay it was missing.
I believe this truck was taken to a muffler shop or some,one wiring it up looking at it its not factory
Thanks for the reply and help
John

 

what does WOT mean
I just know it as WIDE OPEN THROTTLE
does it mean wide open terminal
does this black / light green wire (back up lights / reverse lights) just use one wire for both trailer and truck reverse lights ?