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Thread: Help Needed On Foglight Mod

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    Default Help Needed On Foglight Mod

    Just saw a vectra drive pass me and flashed to say thanks, as he did is fog lights came on at the same time as the main beam, then talking to mate he said its possible to wire them them but anybody know how?

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    I’ve done this loads of times in the past.
    Not so easy on the Vectra C due to the canbus wiring and the fact none of the lights are powered direct, they all go through a module.
    The safe way to do this.
    Take a live feed from one of the main beams, through a fuse and into a relay.
    Power the relay direct from the battery.
    Run the live out of the relay direct into both fog lights. (you could do this individually on each side of the car, ie, a feed from each side, and a relay per side, but this in not strictly necessary)
    But, put a diode into the original factory wiring to the fog lights.
    Put it in-between the feed from the relay and the original factory wire going back up into the loom, towards the module.
    But your new feed (from the relay/s) should still go direct into the light, if you know what I mean, this is really quite simple, but hard to explain.
    This will prevent any power feed back into the module for the fog lights from the main beam, which, if it happened, may well cause some damage to the module.

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