Quote:
Originally Posted by bwrichardson
1983 911 SC targa, stock, 142000 miles, new to me summer of '13.
With the ignition on Acc or On (engine running): when the low beam lights are on, the right low beam fuse #5 fails when the fog lamp switch is closed. With relay #2 (fog light relay) removed, fuse #5 does not fail.
The fog lights do not light; the left (driver side) low beam lights; both high beams light; the parking lights light; the high beam flash works with the ignition switch on, but not when off. I've searched and looked at the wiring diagrams without an answer. Fuses #5 and 6 (R and L low beams respectively) are bridged behind the fuse block, so how can anything short the #5 fuse without the #6 fuse also failing when the fog lamp switch is activated yet the both low beams are lit fine with the fog lamp switch off? I appreciate help.
Bruce
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If you look at the bottom of fuse 5, you should see a grey wire in addition to the white wire that goes to the headlight low beam. The grey wire is the power source that activates the fog light relay. Normally, they load on the grey wire is very small as all that it does is activate the switch in the fog light relay. Sounds like the fog light relay has gone bad (probably a direct short) and should be replaced. The white wire coming off of fuse 6 only goes to the other headlight low beam. That is why #6 doesn't blow also.