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Electrical gremlins (No headlights) V70-XC70 1998

posted by  B.B. on  Sat Jun 1 18:14 CST 2024
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Boris,

Yes the lamp relay is "104 108" ("2/1"in the schematic)
The part # for 850 is 3523200

I'm using the schematic for a 95 850 which is likely the same but no guarantee.

You should dig up the Volvo wiring diagram for your model year to troubleshoot
with high confidence. Maybe you'll find it for free?

When you pull the dual relay 104 108 are you able to read connector pins
where the relay plugs in?

You can read pin numbers on the dual relay,
pin 15 is the +12V control line from the light switch for low beams
make sure the headlight switch sends +12V to pin 15
This may help.

Trying to troubleshoot wiring requires the Volvo Wiring diagram for your model year.

Give an email address and I'll send you the headlight wiring info that includes the relay and harness pinout from the 850 book.

Bill





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