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Intermittent electrical failures on 1998 V70 V70-XC70 1998

posted by  someone claiming to be Borko on  Mon Apr 22 07:27 CST 2024 [RELATED]

Thanks for great feedback. I appreciate it. I took a look at the "controller box".
I noticed the "Light control relay" 35 23 200 was there. I opened it up, carefully to look at it under microscope, for hairline cracks. Something I found useful when I owned Bricks (240, 740, 940) over the years. Fuel relay on those cars was notorious for misbehaving due to poor solder joins.
I put the light control relay back. Now I have signal lights, but still no headlights. I can bring 12V directly to my low beam bulbs and they both work.
So bulbs are OK. I had them for few years and never had issues.
Interesting thing is, if I pull on the high beam lever I get high beams for as long as I'm holding the lever. Once I let go of it, high beams go out.
To answer your question I haven't replaced any light bulbs in few years.
I wonder if my problem is with the light switch...
Can I test it, other than by substitution?
p.s. On my other Volvos if I put in the wrong type light bulb the "Bulb failure" indicator would light up on the dash. Yes, it's a jungle out there when it comes to parts from other countries. I learned the hard way never to buy any oxygen sensor other than Bosch.






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