911 headlight probs
10-25-2002, 12:56 PM
#1
2nd Gear
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Join Date: Jul 2002
Location: GREENWOOD,SC
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911 headlight probs
The headlights on my 87 911 are not operating consistently. Sometimes they come on and other times they do not operate. The flash feature does operate all the time. Any ideas on what to look at?? Thanks
10-25-2002, 01:35 PM
#2
Intermittent problems are a real PITA, aren't they? A wiring diagram would be helpful. I use the ones in the Haynes manual for nearly all of my electrical work.
Could be the headlight switch itself, dirty connections to the fuses, lights, or connection points inbetween. Wet weather can also contribute. Just last night, I noticed my right side bright wasn't working, so I fugured it was the bulb, so I removed the heeadlight, pulled the bulb (nice, tight connection), did a continuity check on it, and it tested fine. Power was present at the contact as well. So put it back and it worked fine...just a little invisible corrsion or something.
WARNING: If you change the switch or disconnect the battery first! It carries a lot of amperage all the time. I once hit a ground while widthdrawing the switch and almost toasted the main harness.
Could be the headlight switch itself, dirty connections to the fuses, lights, or connection points inbetween. Wet weather can also contribute. Just last night, I noticed my right side bright wasn't working, so I fugured it was the bulb, so I removed the heeadlight, pulled the bulb (nice, tight connection), did a continuity check on it, and it tested fine. Power was present at the contact as well. So put it back and it worked fine...just a little invisible corrsion or something.
WARNING: If you change the switch or disconnect the battery first! It carries a lot of amperage all the time. I once hit a ground while widthdrawing the switch and almost toasted the main harness.
