[angrydan]

They are all under the hood of the car right above the battery. The relay layout is printed on the cover.

Usually, I pull one with the same amp. rating from another system I know works and swap it with the suspect one. The amp. rating should be printed on the top or side of the relay (I don't quite remember which).

If it works, then the relay was your problem. If it doesn't, swap it back and keep digging. Just from my own experience, whenever I have had headlight problems, it always ends up being the relay(s).

Good luck!!