Fog/Headlamp woes...... November 05, 2012, 04:32:42 PM sorry....little long......-ok electrical gurus...i can run a video cable thru multi components with no problem, but following electrical wires to me is a nightmare! here is the problem....on my '86 TC driver, the p.o. took the wires off the back of the fog lamp switch, it has a black one, a brown one, and a light blue?/with a red stripe. (3 wires.) they took the blue/red one and stripped it and connected it to the brown one....with tape. they then made a wire and connected it to the left over connector from the blue/red one and ran it down, and put one of those part store connectors on it that slip in behind a fuse to power the switch? i guess. well one of the bulbs blew in a fog lamp, and i replaced it. went to check and made sure it worked but didnt. couple of seconds later, i see smoke coming from under the dash. melted the power wire that went into the fuse panel and the fuse! thats when i found the wiring spliced. so i figure ill do away with that. so i undid it, put it back "factory" and now when i turn on the fogs, they dont work, then the power wire to the headlamp switch starts smoking. so i'm not good a finding the problem or diag. one guy said i needed a new headlight switch, that its not putting enough power to the fog lamp switch. i'm not electrically inclined. can someone point me in the direction in which i need to go???? thanks too all...... Quote Selected
Fog/Headlamp woes...... Reply #1 – November 05, 2012, 05:35:12 PM what exactly is burning? The wire, or the switch?BTW, here is the wiring diagram. Quote Selected
Fog/Headlamp woes...... Reply #2 – November 05, 2012, 05:52:49 PM -thanks, yeah i just found a '85 evtm. starts smoking from the large power wire going into the back of the headlight switch......i ASSUME the wire is hot starting to heat up the connector and switch. so far, have seen it right away and got it off so there is nothing melted/burnt at that point...... Quote Selected
Fog/Headlamp woes...... Reply #3 – November 07, 2012, 12:40:28 AM If the main power wire to the headlight switch does not overheat with just the headlights on, the problem is with the fog light circuit.An overload in the fog light circuit should blow fuse 7.1. Check the 10 amp fuse 7 to see if it is over fused or bypassed in some way.2. Is it physically possible for the black wire on the fog switch to be on the wrong switch terminal?3. Try disconnecting the Tan/Orange wire from the switch to see if that removes the overload.4. Try removing both fog lamps.5. Trace the Tan/Orange wire to find where it is shorted to ground. Quote Selected
Fog/Headlamp woes...... Reply #4 – November 07, 2012, 11:03:18 AM If you have a multimeter check the resistance between the Tan/Orange wire and ground with the bulbs out and the wire disconnected from the switch.Should be an open circuit. Quote Selected
Fog/Headlamp woes...... Reply #5 – November 07, 2012, 02:12:12 PM -thanks softtouch. when p.o. had spliced the wires as i said before, they done away with the #7 fuse as we had to put one in. but however they had them wired behind the switch, which was drawing power directly from a fuse(which was the one for accessories...radio, etc), the lamps worked fine. but when i replaced this last bulb, that is when it seems something went haywire, and melted that power wire, so thats when i pulled the fog switch and saw the splices(very poorly done) and decided to put it back normal, hence, where i am now..... Quote Selected
Fog/Headlamp woes...... Reply #6 – November 08, 2012, 12:10:18 PM -got them working, as per the factory. worked fine all afternoon. then on the way home, they went out. then the headlights went out. so back to the drawing board.... Quote Selected
Fog/Headlamp woes...... Reply #7 – November 08, 2012, 02:35:17 PM You are probably looking for a short in the fog lamp feed circuit, but it could be either a faulty wire, chafed wiring harness or perhaps even a casualty of melted wiring harness or connector. Quote Selected
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