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Electrical & Computer SystemsDetails discussions regarding electrical components, wiring, all lighting, wire harnesses and HID conversion for your vehicle.
This is a discussion thread titled "How do you remove the relay for the Fog lights?", within the Electrical & Computer Systems forum, part of the Technical & Vehicle Assistance Forums category.
I want to replace the fog relay with one that is shorted so that the fogs can be on with the high and low beams.
I tried to pull the relay out from the fuse/relay box in the engine compartment and it's in there pretty darn tight.
Any tips on getting that thing out? Is there a tab holding it in that I need to lift with a screw driver. It's a little tight to see what is actually holding it in.
I want to replace the fog relay with one that is shorted so that the fogs can be on with the high and low beams.
I tried to pull the relay out from the fuse/relay box in the engine compartment and it's in there pretty darn tight.
Any tips on getting that thing out? Is there a tab holding it in that I need to lift with a screw driver. It's a little tight to see what is actually holding it in.
alan
If memory serves me, and sometimes it does not, their is a tab you need to very carefull pry with a small screwdriver, then lift the relay up. Use a flashlight and magnify glass if needed to see it.
Wouldn't shorting the relay cause the fog lights to be on all the time, even without any other lights on and when the truck is off? The electronics section of this board has procedures to re-wire the fog switch so that the fogs will come on with low, high or marker lights but will go off with the auto off function.
Wouldn't shorting the relay cause the fog lights to be on all the time, even without any other lights on and when the truck is off? The electronics section of this board has procedures to re-wire the fog switch so that the fogs will come on with low, high or marker lights but will go off with the auto off function.
Good advice from MMitsock. Shorting the relay won't work. Do a search for fog lights and you'll get tons of information for what you're looking for.
Wouldn't shorting the relay cause the fog lights to be on all the time, even without any other lights on and when the truck is off? The electronics section of this board has procedures to re-wire the fog switch so that the fogs will come on with low, high or marker lights but will go off with the auto off function.
What's shorted is the power to the relay so that it doesn't go off when the lights go to high beam.
I've got the DRL which makes the whole mod a lot trickier than without the DRL. I don't want to go into the wires in the fuse box to tap into a hot wire, I'll just use a modified relay. That box is pretty tight and I just don't want to mess with it.
You probably know more about relays than I do. The way the wiring changes work is they allow power to the fog switch in any light control setting by drawing power from the dimmer switch. From the factory, the fog switch only gets power with the low beams. I assumed the power flows through the switch to the relay to pull it in and turn on the fogs. I think the relay has power on one side all the time but only when it is energized form the switch will it close and complete the circuit to ground and light the fogs. If you short or jump the relay won't the fogs be on all the time?
A relay is a switch. Instead of a finger pressing the button, a control circuit, separate from the power circuit makes the switch. If I remember correctly, the fog light relay has four pins. Two pins are the power circuit which feeds the fog lights. The other two are the control circuit which makes the coil in the relay, to make or break the switch (contacts) inside the relay. It's the control circuit part of the relay that you want to modify. By modify, feed the relay coil from a different source. On my truck I just feed the relay coil from the dimmer which is right next to it. I like feeding it from the dimmer because my fogs will work with the lights in high, low or parking lights. If the switch stalk is completely off, my fogs are off.
If you put a jumper from the power circuit (positive wire) across to engage the relay coil, then the relay will always be on. None different than removing the relay and jamming a piece of wire across the power ciruict. That doesn't sound safe to me. Sounds like a fire waiting to happen.
How do you remove the relay for the Fog lights?
waiting to happen.
Linear Mode
