Uni high beam
#1
Uni high beam
Hello everybody,
Noticed my drivers side high beam was not working. Bought a new bulb and that did not fix it. Researching here a little and checked fuse #17 and pulled relay, looked ok. After reinstalling relay checked and still no driver side high beam. Indicator does come on on dash for high's. So new relay needed? Or can this one be re-soldered like I did with manual down shift button one?
Another light question: My right (passenger) turn signal works but flashes at a high rate, when either parking lights or both headlights and parking lights are on. All bulbs seem to be working. Left side works fine at all times. Could this be related to the high beam, on the drivers side, relay?
Thanks,
Mike
Noticed my drivers side high beam was not working. Bought a new bulb and that did not fix it. Researching here a little and checked fuse #17 and pulled relay, looked ok. After reinstalling relay checked and still no driver side high beam. Indicator does come on on dash for high's. So new relay needed? Or can this one be re-soldered like I did with manual down shift button one?
Another light question: My right (passenger) turn signal works but flashes at a high rate, when either parking lights or both headlights and parking lights are on. All bulbs seem to be working. Left side works fine at all times. Could this be related to the high beam, on the drivers side, relay?
Thanks,
Mike
#2
#6
hmm, looking at the 1991 headlight wiring diagram, there IS no high/low relay. there is a headlight power relay which comes on with the ignition, and provides power to all high AND low beams, then it goes to the high/low clicker switch on the steering column, and the high beam signal goes from there to the relay panel where it splits and goes to fuse 17 and 18. fuse 17 powers the dashboard blue 'highbeam' light, *and* the left highbeam, fuse 18 powers the right high beam. Do you get both high beams if you hold the switch back like to flash the beams ?
so if there's a problem with only one highbeam, and its not the fuse, then its almost certainly the wiring at the headlight socket. the left high beam is a blue-white wire, while the right one is a red-white.... on each side, the high and low beam share the same ground connection, so if the low beam works, the ground is good. The only other significant difference is the route the wires take... the left high and low beams go through the lefthand bulkhead connector, and the right beams go through the right bulkhead connector... these are large rectangular connectors on the extreme sides of the firewall that have about 100 wires each. I had a older car where rodents had chewed through similar wiring.
so if there's a problem with only one highbeam, and its not the fuse, then its almost certainly the wiring at the headlight socket. the left high beam is a blue-white wire, while the right one is a red-white.... on each side, the high and low beam share the same ground connection, so if the low beam works, the ground is good. The only other significant difference is the route the wires take... the left high and low beams go through the lefthand bulkhead connector, and the right beams go through the right bulkhead connector... these are large rectangular connectors on the extreme sides of the firewall that have about 100 wires each. I had a older car where rodents had chewed through similar wiring.
Last edited by pierce; 12-19-2018 at 11:40 AM.
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