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Old 01-18-2009, 10:36   #1 (permalink)
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LCM help

The smoke got out of my lighting control module on my 98 Grand Marquis. The local dealer sez it's discontinued of course and it's really really expensive anyways..
He's my question, can anyone here identify the burned part for me? I figure if I had an idea what it was I can solder on a new one ( I've done a bit of PCB soldering on computers)
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Old 01-18-2009, 16:34   #2 (permalink)
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Re: LCM help

I'll have to check but I think it's a diode. Why not check this link and maybe you can find a usd one close by. I saw one for $75.

Car-Part.com--Used Auto Parts Market
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Old 01-18-2009, 17:38   #3 (permalink)
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Re: LCM help

I found out what cooked it, the main ground bolts for the dash were loose, I guess I missed tightening them up when I had the dash out last month to do the heater core.
Looks like the heater fan was trying to ground back through the light circuit and cooked the little guy, I put it all back together and the only thing that isn't working is the high beam indicator...
If you could find out if it is in fact a diode I'd apreciate it
Thanx
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Old 04-16-2009, 18:30   #4 (permalink)
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Re: LCM help

thats hard for me to see, but if you can find and trace where that component goes to relating to the black jack, in other words see what the harness wires say, do they say +12 volt, gnd, etc. If you can find a negative and positive on that harness that goes to the black connector, then you would most likely say its a diode if one of them (+ or 1 volts) goes to the burn part. You can also just remove that diode or jumper it and see if things work again. Do note that you must make sure you dont get that short again, cause it will burn the board without a diode. the diode was made to burn up to protect the rest of the components. I dont have the old one anymore, but I will look for it. If I find it I will certainly make a post again on it.
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Old 04-23-2009, 19:24   #5 (permalink)
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Re: LCM help

what is the manufacture part # on the box?
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