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Lost my Headlights


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On my '86 720....I lost my headlights.  I was coming home and they were flickering while on highbeam.  About 1/2 mile from the house, I smelled a burning nylon smell....maybe rubber.  I turned the HBs off, and it seemed to go away.  When I got home, looked at them, on highbeam and I think that I was losing the Driver's Side lowbeam.   Shortly afterwards, they went out.  nut/N  I don't even have a highbeam indicator light.


Today, I checked all of the the fusible links at the battery.  They all are passing 12v (or at least they light up my testlight).  The 2 headlight fuses are good and the testlight shows that they are passing current.


The relay above the fuse box...it seems to be working.  It clicks when I turn on the lights and also when I flip on the highbeams.  I switched out the one from Ole-Blu (my parts 720) and the same thing. 


At the relay plug....it seems like I only have 12v on one plug and, only on lowbeam.


Got any ideas?



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Forget the headlight relay. It only chooses hi or low beams and provides a ground to turn them on.



After 35 years the grease on the headlight contacts has become hard and or dirty and the switch is not making good contact. Resistance will cause heat and that's what you smell. Unscrew the two part 'clam shell' around the steering column to get access to the headlamp switch. It might be best to remove the steering wheel also to really get at and disassemble it enough to spray inside. Get a can of aerosol electrical contact cleaner and lubricant and spray it clean.


If you have a parts truck just swap the headlight switch. Clean and keep the old one for a spare.


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