Question about 2004 Hummer H2

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Fog lights there is relay & fuse in fuse box under hood no switch in cab. are there wires for this install if so were?

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Sometimes they are connected with the low beam headlights. when you turn your low beam on, the fog lights would come on too. if they are factory installed.

if you are just going to install it, you can put a separate switch if you want to.

tnx 4 using fixya,

drcool

Posted on Sep 17, 2008

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Dear,

here is a link for help

samitoelectronics.net/INSTALLATION_SEQUENCE_docu.pdf

regards,

Posted on Sep 17, 2008

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Power is applied to the fog lamp switch which is a separately controlled part of the main light switch. When the fog lamp switch is turned on, power is applied to the fog lamp relay in the battery junction box which closes to turn on the fog lamps IF 20A FUSE 19 and 15A FUSE 44 in the BJB are OK. Setting the multifunction switch to HI closes the high beam relay in the BJB, removing power from the fog lamps and directing it through 20A FUSE 46 in the BJB to the high beam lamps. In other words, you can have fog lamps or high beam lamps but not both at the same time

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Hi, if the light on the switch is coming on, the relay is fine. Unless both bulbs are burned out, the problem is in the wiring between the relay and the lights. I recommend you trace the wiring backward from the passenger side fog light to the power box under the hood to see if the wire is cut. There should be two wires coming out of the power box--one going to each fog light. If the wiring looks good, it is also possible that the ground to the lights is bad.

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OK, you need to connect a relay to one of the 'power' wires under the hood that leads to the bulb of the low beams. Then, the fog lights will go on only when they are turned on or off.

Otherwise, you could have a relay that is controlled by a switch that independently operates the relay and thus the fog lights.

Both methods are legal in, Pennsylvania, anyway.

Sometimes hooking up the relay to the fuse box will only turn the fog lights on if the ignition switch is turned on for switched fuse box contacts. And, sometimes, hooking the relay to the fuse box will keep the fog lights on all of the time, as the fuse box may be energized at all times at certain contacts.

Good luck on installing your fog lights, correctly.

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If you bought the fog lights from Ford and they plugged into factory plugs at the front bumper, then I suspect you need the headlight switch that came optional for your car. You will need to install a relay into the fuse box. Check for any fuses for that circuit. I did one on a Ford f-150 and the switch came with the lights from Ford.Usually the fog lights are not on until you push a button or turn the switch.

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