I have a 1990 760 with a head light issue. when I start the car and turn the head light switch on the lights dont come on. I can flip the brights on then of and they will be on but for only about 20 seconds, so I have to drive around with the brights on. is this a relay issue or something else. thought I would ask before spending $140 on a relay.
thanks

Once, our '90 744 TI would stall when the high beams were used - I found the problem in the FAQ - bad grounds.

I had another electrical problems and discussed this with a Volvo tech.

He told me to clean any and all the connections in the car, add dielectric grease (he even gave me a tube of it!) and zip tie together any connectors that I could.

In the engine compartment, I did one connector a week so I could know where to look if I had a problem.

I never had another electrical problem.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 485,000 miles put on 9 bricks

Some odd headlight issues can be caused by dirty ground connections on the inner front fenders. Try cleaning them all on both sides up near the front.