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Full beam mystery - beats me :o( 900 1991

OK this 940 SE - can`t get full beam up on it at all.
I spent some time swapping the relays under the ashtray with working ones from my 740, although the Haynes manual notes that some lighting relays aren`t movable, they`re part of the circuit-board(?).

So.....

Firstly, I don`t know which relay operates full beam. Can anyone ID it for me please?

Second - could this possibly be a problem with the stalk switch not working? Does anyone have an idea how I could check this fairly easily? It seeems to work positively enough, so I really don`t see it being a problem, but you never know.

The problem also seems to be with the Fog lights - the rear ones don`t work, nor do the front ones, nor do the driving lights at the front (ie, not the side lights, the "other" set integral with the front light cluster)
All other lights work fine.

`Fraid it officially beats the shit out of me :o) any takers?

Cheers

Sinbad








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    Full beam mystery - beats me :o( 900 1991

    There may be several owners of 940s that don't realize that the 940 SE has a different layout for the relays and location of the fuses. The layout is the same as the early 960's. Relays are accessible by removing the panel underneath the glove box. The relay controling the headlights is the largest one on the top row. Fuses are located on the left side of the insturment panel.

    Another area previously mention is the grounds. There are several grounds in the engine compartment. The grounds for the headlights are located on each fender next to the headlights. Follow the black wires, there should be around four on each grounding strip. Lets us know what you find.








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      Full beam mystery - beats me :o( 900 1991

      Cheers all.
      I did some more fiddling around yesterday, and found that by pulling the switch onto `flash` v-e-r-y slowly I can make the relay chatter and the full beam come on. This enabled me to locate the relay, which is mounted up inside the kick panel on the drivers side (UK - so the same side as you said Jerry but it`s all laid out up the inside of the wing and footwell rather than under the steering wheel etc.)
      So, it *looks* as if it will be a matter of taking the relay out and cleaning/adjusting and seeing what happens then (I checked/cleaned earths as advised - thanks for that tip). Only probelm is it looks a complete PITA to get at as it`s buried under all sorts of stuff...








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    Full beam mystery - beats me :o( 900 1991

    The main headlight relay is the 2nd from the left, front row. Mine were switched when I got the car last month and I had really strange headlight problems.

    Paul

    94 945








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    Full beam mystery - beats me :o( 900 1991

    Check your front chassis grounds to make sure they are clean and not corroded: they can cause all sorts of electrical anomalies.
    To check the stalk operation, remove the top steering column cover and peel back the rubber cover at the stalk base. This exposes the wiring, which you can test with a pin pierce for various signals. It definitely helps to have the Volvo OEM wiring diagram book, not Haynes or Chilton.







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