2001 Pontiac Grand Am fog lights

3 wires behind the switch? One should be ground, 1 should be power (only to turn on thelighted switch, the other wire goes to the BCM (Body Control Module)to tell it to turn them on. If you jumped one ground straight to the signal wire and they came on, you may just have a bad switch. Do you have a meter to test for continuity to ground on the one wire and power on the other?If ground is good, and the one wire has power, the other should ground when switch is turned on, if not the switch is bad

Did you test for ground like I suggested? If you applied power to the BCM you may have damaged it. Try swapping that relay for another one just to see if it will work

With a meter set to Ohms

The black wire with the white tracer is the ground wire. Use a meter to check continuity to ground.(Set on ohms and put one end on good ground other probe the wire)When you tun on the fog lamp switch it connects the ground to the orange wire which is the signal to the BCM to turn on the relay

Here is the wiring diagram for the fog lights.The orange wire is signal out to the BCM (Ground) to turn the lights on.The Dark Green and white wire at the relay is the trigger to turn on the lights from the BCM, it should turn to ground when the switch is on.If not you need to test the orange wire for ground with switch on to see if the wire is good.The purple wire at relay goes hot when relay is on the other two wires at the relay should have power

If the orange doesnt go ground, the blk/white wire at switch may have a bad connection to ground. If orange goes ground with switch on, test the dark green/white wire at the relay to see if it is grounded.

If the orange wire is grounding too. It is the signal to tell the BCM to turn the relay on. To be absloutlety sure you will need to locate the BCM to verify the orange wire is good to it

If the BCM tells the relay to turn on, the Dark green/white wire will become ground

Nope.