Anonymous
Anonymous asked in Cars & TransportationMaintenance & Repairs · 9 months ago

High and low beam, left and right headlights out. Could it only be the switch?

Fuses are ok. All other lights work fine, just both headlights not coming on.

Update:

'06 vw beetle tdi

7 Answers

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  • Anonymous
    9 months ago
    Favorite Answer

    Check the chassis ground wire on the left side headlamp wire harness, then check for +12VDC on the left side headlamp harness B+ wires for voltage to the chassis ground or negative battery terminal. A simple 12VDC test light will suffice. No one will help you here on YA if you don't post the Year, Model, and manufacturer Make of the vehicle in question. Contrary to popular thinking, not all cars and electrical systems are generically the same and thus are not simple answered by a partial info given assumption.

  • 9 months ago

    Burned out bulbs, or an issue with power or ground.

    Check for power and ground, and fix if necessary. Otherwise, replace the bulbs.

    Bulbs usually don’t burn out together, but it’s still important to rule that out by checking for power. Most total headlight failures are caused by a bad component like a fuse, relay, or module. Wiring problems can also cause both headlights to stop working.

  • 9 months ago

    If you reveal the yr, make, model I'll post it.

  • 9 months ago

    If you didn't know the engine bay has a fuse panel, how do you know the fuses are good?

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  • Dan
    Lv 5
    9 months ago

    If your car has daytime running lights it could be the module. Best to get a wiring diagram and trace it out. If you reveal the yr, make, model I'll post it.

  • Anonymous
    9 months ago

    You need diagnostic tools to fix the car.  Guessing is not the proper way to fix it.

    Check for power at the fuses.  Check for power and ground at the headlight connectors with the switch ON.  Check for inputs and outputs at the relays with the switch ON.  Check for input and output power at the switch with the switch ON.

  • Anonymous
    9 months ago

    Ah, yes, consult the council of know it all mechanics on Yahoo Answers. Excellent choice.

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