Well, so a few days ago I went to start my truck, and 1 set of mu PIAA 520's were on. I go to switch them off, and the switch doesn't turn them off. I try and turn on my other set of PIAA 520's which are running off another Toyota Fog Light Switch, and they don't turn on. So one set of lights is permanently on, and one set of lights won't turn on. I don't know what could broken, I have had fiddled with any wires since I installed them, when both sets were working perfectly. Has anybody ever heard of the Toyota Fog Light Factory switch breaking? Could it be the PIAA lighting harnesses? TIA

 

stuck relays?

 

stuck contacts on the switch (or a relay)?

will they shut off if you disconnect the wires from the switch (relay)?