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Headlights only one working

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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cichy1012
Posts: 41
Joined: 10 June 2015
Year and Model: 1999
Location: usa
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Headlights only one working

Post by cichy1012 »

1994 Volvo 940 one headlight is working. New bulb in other one not working. If I put the brights on they both work. Have voltage at the plug, voltage at the relay.
Is it the relay itself? Is there another in the cluster I can swap to check?

cichy1012
Posts: 41
Joined: 10 June 2015
Year and Model: 1999
Location: usa
Has thanked: 1 time

Post by cichy1012 »

OK something new. If anyone can help I’d appreciate it. As per my previous post I thought when I put the brights on that both of them were working. As of right now my passenger side headlight only works but my driver side does not. When I put the brights on the driver side bulb lights up but I have nothing on the passenger side. This makes no sense and I change the relay

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volvolugnut
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Post by volvolugnut »

Check the condition of the wires near the headlights. The insulation may be failing and giving strange results. This may also cause various, changing faults.
volvolugnut
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cichy1012
Posts: 41
Joined: 10 June 2015
Year and Model: 1999
Location: usa
Has thanked: 1 time

Post by cichy1012 »

Ok so the voltage I get on the side that works is 10v on one pin and 12 v on the other pin.
The side that’s not working is only showing 10v on each pin. Ugh wiring looks good

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