Question about 1999 Pontiac Grand Am GT

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Headlights and fog lights don't work

Hi,
I have a problem with my headlights and fog lights won't work,I have check all the fuses and grounds. Please help

Dave, Thank You

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Could be the headloght switch

Posted on Mar 09, 2009

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Have a dirt bike with headlight. Three wires for hi/lo, how do I put two fog lights in place of that head light without too much wiring work. I don't need hi/lo option


one wire will for high beam
one wire will be for low beam
the last wire will be ground wire
as fog light have only one beam you can use the low beam wire and parallel wire it to the fog lights
that way you have the head lights still and the fog lights as accessories correctly wired according to regulations
how to do it simply-- find the low beam power wire ( light switch on low beam and power at the light bulb check ed with a multi meter set on volts
solder , piggy back, or double plug in a connection into that wire and run one wire to the left fog light and one to the right fog light connect each fog light to an individual ground wire and connect those wires back to the ground wire for the main lights
Now having done that simple addition to the lighting system another problem has come up
The wiring will now be too light to carry fog light current and or the light switch will burn out
To over come this problem, the circuit needs a relay
fit a relay on the bike and now run the low beam wire to a terminal of the relay
run the other terminal wire to ground
this enables the relay to operate when the low beam is switched on but at this will not switch on the lights yet
now you have to run a heavy gauge wire (fused at the battery) to one of the power terminals of the relay and from the other power terminal to the connection for the fog and low beam lights
Now it all works switch on the high beam and no for lights
change to low beam and the fog lights come on as well
All nice and legal
Of course if you don't care about being legal just buy a 30 amp toggle switch and run a fused wire directly to the switch from the battery to the lights and then to ground from the lights
You will know that the generator / alternator for the bike will not be able to run the fog lights with or without the main lights so what will you have achieved

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1 Answer

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P lights and fogs are fused separately to h lights. Go to the fuse box. Next the high low relays, then the column switch, but have a test lamp ready to test for a supply at the actual headlamp because if there is power to the lamp but no light, check the ground wires from the headlight unit are tight and on clean bare metal

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Headlight fuse might be blown. Check the fuse panel and replace it with one rated for the same amperage.

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First you have to make sure the bulbs are good, if they are check out good, you need to check the fuses and switch.
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Sounds like a ground wire problem. Does it act up in the rain or after a wash? That could indicate the fuse block under the hood my be geting moisture. But definitely check the main ground, fuse Block ground, and headlights ground. Check headlights plugs n turn signal plugs n sockets. Also, start by changing the bulbs. Both of them. There's two filaments in each bulb, one for marker lights and one for blinking

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You need to check the bulbs.These are known to go out a lot.Also you can check that you have power to the lights with a test light.Sounds like a bulb or wiring problem.I have had a few of these that are broken off because they are so close to the ground.Depending on if your four wheeling or in snow country.Hope this helps.Good luck.

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Interior lights work, tail lights and fog lights work but no head lights hi or low checked fuses all OK. 1993 Chevy p/u 1500 Manuel 5spd how would i know ifs it's the head lamps or they need to be...


quickest way is to use a test light at the plug connector at the headlight and check for ground and power to the connector.if you have both then the headlights need replacing.you could also grab a good light and plug to the connector and turn on the lights and if it lights then again the headlights need replacing.if you have no grounds or power at the connector then the ground side will need repair.if you have no power then you could have a bad headlight switch on the headlight circuit of the switch and it will need replacing.

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99 gmc denali dash light, parking lights, tail lights, and dash light dont work. Interior lights, brake lights, blinkers, headlights work Turning on the headlight switch blows number 15 drl-fog fuse...


You have a short to ground somewhere in the drl-fog lamp circuit. Check for obvious wiring connector or wiring to drl & fog lamps. check wiring for pinched or broken wires coming from sockets. If you don't find problem, you can trace wiring from lamps to main harnesses and hopefully find source of short.
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Both headlamps not working,they both came on momentarily then ceased working, I have checked both the 15 amp fuses in the engine compartment fuse box and both seem okay - any suggestions


I would check the headlight switch. It could be that you are able to turn the running lights on but the headlight position is not working. Using a test light check for power at both sides of the fuse. When using a test light do not just check all fuses as you do not want to use a test light on the air bag fuse(s). If there is no power on both sides of the fuse (and you already check that the fuse is good) then there is a problem somewhere in the electrical. If there is power at both sides, then the next area to check would be the headlight switch. If the vehicle has fog lamps, turn them on then turn the headlights on. The fog lights should come on. If not then you can almost guarantee it's in the switch as it controls both the fog lights and headlights. Pull back on your turn signal switch (or push it forward) to see if the high beems come on. If they do not but the fog lights go out, then it's highly probable that the headlight switch is bad.

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