Courtesy Lights Don't work - Need help finding the problem

[MavrickMA]

Originally posted by ELVATO
Hmm... that is weird. So they come on when the door is opened and when you unlock, right.

As far as I remember, there's three contacts to a switch light. My guess is a ground, a positive when the door is open, and a positive that's always on (this goes to the switch part.)

So I guess the constant on one isn't working.

You are exactly correct, at least according to my test light. I checked the fuse and it works, and I checked what I'm assuming is the wire for the circuit coming out of the fuse box and it works too! So I'm guessing there's a cut in the wire somewhere, or something like that. But with the amount of wire that is in this truck, how the heck am I supposed to find it?

 

[MadTxn]

I've got a wiring book at home that I *might* be able to scan. The problem is figuring out exactly where the harness goes.

 

[MavrickMA]

Originally posted by MadTxn
I've got a wiring book at home that I *might* be able to scan. The problem is figuring out exactly where the harness goes.

Hey, if you can figure it out and send it to me, that'd be fantastic! Stealership wanted $400 to diagnose the issue!

 

[MavrickMA]

Anybody else out there got any ideas? Maybe someone from Ford that's on this forum or somebody knows somebody from Ford?

Thanks!

 

[aircargoo]

OK...I JUST POSTED...OPPS caps.......anyway....i looked in ALLDATA at work and there a rpo relay box under the dash above passenger airbag

i cant get my dome light and running boards to light when door opens

my door markers lights work fine....nothing installed but a radio

location is there....but doesnt look like it...theres a box there but not messing with it just yet...

i pulled one out from a 00 expedition yesterday....theres one relay there,only 1.....according to ALLDATA....theres suppose to be same as 97....a rpo box with fuses and relays.....i dont see it...bet mine has only 1 switch or relay to....