3rd Gen Fog + High beam diagram

Here is a quick and dirty photoshop diagram of how you can have fogs and high beams on at the same time on your 3rd gen.

Essentially its as simple as having two power sources:

1. Stock power/switch that came with the truck
2. Aftermarket with a relay/diode

A diode works like a valve, only allowing the flow of electricity one direction(towards the silver band on the diode) which is essential if you choose to wire up your lights this way.

Lets assume you already have a light bar wired up to run off of a relay(my light bar relay is triggered when my high beams are on). Splice a new wire from pin 87 of your relay, down to your fog lights, with fuse and diode inline.

Cut your factory fog light + wire and add a diode so that the silver band is on the same side as the light. Solder/twist/tape everything back together.

Your fog lights should now stay on when you switch your high beams on, because they are being powered by the same relay as your light bar, as well as you factory fog light circuit.

 

Worth mentioning. If you do it this way, make sure the diodes will handle the load of the fog lights. It's not gonna work with a 1/2 watt circuit board diode. Amps X volts = watts. I don't know how much the factory fogs draw, but if they only draw 1 amp, you're gonna need a diode that will handle 15 watts. I'm gonna guess they draw much more than 1 amp.

 

Excellent point, i'd imagine a 5 amp diode should be plenty. 5 amp should be good for 60 watts, I believe the factory fogs are 55w, but i'm not 100% on that.

 

In your circuit, you're feeding both fogs through 1 diode, so, whatever they draw, multiply times 2.

 

Correct