84 928S headlight wiring schematic

[raccaro]

Low beams work fine. When I flip to the high beams the driving (fog) lights come on with the low beams. Would like to know which colored wires should I connect my high beam switch into for the highs to light? I would even consider adding a separate high beam switch but still need to know which wires feed the high beam bulb filaments. Thanks

[928ram]

raccaro,

I'm looking at the wiring schematic, and it doesn't indicate wire colors for the '84 MY; plus on the other years there's no indication which wire runs high/low.

Unless the wiring has been cut/spliced for some reason, the problem you describe is more likely to be a switch or a ground issue. I'd give the grounds a good cleaning first as they can be problematic on 928s: main battery cable at body attachment, engine to frame (P/S low), behind fuse panel, at steering column support, 2 at upper radiator cross brace (often hidden). Fuses for the highs are #24 - left and #25 - right. Relay for the lamps/motor # XIX-XX (large combo relay). I'm not sure about this one, but most relays can be opened and the contacts dressed up w/ sandpaper. Other than those, I'd look toward the beam/turn combo switch at the column; these will start to fail with age.

I don't know if that's any help, but I can dig further into the manuals if needed.

[raccaro]

Thanks for the info. I'll check the fuses first . Since some of the wiring had been modified to fit some widebody components, removing the fuses may help me identify if and where the high beam wires are connected.