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Old 05-07-2002, 11:38 PM
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blowing the same fuse over and over?

The fuse which regulates my right low beam and my fog lights has blown twice over the last few days. I changed out all of the fuses and gently cleaned all connections. What up?

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Old 05-08-2002, 02:19 AM
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Join Date: Aug 2001
Location: Atlanta, GA
Posts: 5,514
Try disconnecting the battery, install the fuse, then reconnect and test the lights. If it's repeatedly blowing, and you are sure you're installing the correct size fuse, then you have a short somewhere. Check all the wiring for those lights for crimps, torn insulation, loose/dirty connectors, etc. Don't use a bigger fuse, or bridge it with anything, you can cause yourself MUCH bigger problems than a blown fuse! (Melted wiring, bad switches, BURNING CAR!!! )

1979 300 SD
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1985 300TD
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Old 05-08-2002, 07:07 AM
Join Date: Nov 2001
Location: Cape Cod Massachusetts
Posts: 1,427
Lightbulb Headlight bulb connection!

Closely check the moulded plug that attatches to the bulb! On my SDL the wiring had gotten very hot and melted and burned the plastic compound, it had not shorted but a close examination showed the wires had probably moved within the molten plastic and where almost touching! I replaced both as the second one showed signs of overheating also.
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Old 05-08-2002, 11:51 AM
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Join Date: Mar 2002
Location: SF Bay Area
Posts: 131
If you are sure there are no shorts on the wires and connectors, there could be an intermittent short inside the bulb.
Take the bulb out, turn on the headlight see if fuse would be blown.


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