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I located the 322 splice and tested it. The splice is good! So yet another of my
assumptions has been proven wrong! Fortunately the actual fault is very
close the the 322 splice and I found it! Take a look at the image below.
You see two LT GRN/ORG wires going into the splice. One of the...
Ok, I made another mistake. After inspecting the wires in the door jam
I have concluded that the problem lies somewhere else. Based on a diagram
posted earlier in this thread, I believe the problem is in the 322 splice. It sends
current to the rear and front map lights / vanity mirrors . My...
Oh, I already know how to make a jump connection to circumvent the wiring fault. However, I want to find the actual root cause. Whatever the root cause is could result in other problems in the future which I want to prevent. Also I guess have a bit of OCD : )
I made a lot of assumptions that lead me in the wrong direction. Here
are my latest steps.
I disconnected the fuse panel to allow access to the A Pillar wire connector
and disconnected it. I verified that the A Pillar has no continuity problems.
There is no voltage in the "hot" wire...
Thanks to the generous posters who shared electrical diagrams,
I know that the hot wire that supplies power to the dimmer switch
is on the same circuit as the mirror and map lights. By splicing a
wire into the dimmer switch hot wire and splicing it into to A Pillar
That big bundle of wires near the top of the dash comes from the GEM and Relay Box 4. There is
a cluster of connectors behind the vent opening. I believe the fault is somewhere in that area. I
hope I can access it by removing the fuse panel.
I discovered there is a hot wire splice in the A Pillar. I missed it before
because I checked the wires close to the headliner after they split. Unfortunately
for me, the splice is good which means that the fault is further down the circuit.
I don't have a problem with my relays but this is good information to know:
From Big County:
Relay Box 4 - located by gas pedal behind center of the dash...right above the shinny floor vacuum valve motor...you will see a long black box...take that off...and you will see 7 relays, 1 big one and...
Yes everything else is working.
I really appreciate all the great feedback this thread has generated. Special thanks goes to JC and DR98FL. At this point I am disassembling the dash and looking forward to regaling you all with the solution!
Thank you for confirming what I suspected and the comprehensive diagrams. A mechanic sugested that the headliner had to be removed at a cost of over $1000. I intuitively felt that was wrong.
With your diagrams I feel empowered to fix the problem myself.
Greetings my fellow Explorer Owners! I read just about every thread relating vanity mirror issues but I still have not been able to solve the problem I’m experiencing. Any help would be greatly appreciated : )
I am restoring a 1998 Explorer. The map light and vanity mirror lights do not work...