I was looking for a headlight alarm and was suprised that they aren't an easy item to find. Years ago they had a simple one that clipped right into the fuse box.

Anyways, I found a link on installing a headlights alarm for anyone interested. It uses a $3 part from Radio Shack. It's for a Honda but would imagine it wouldn't be much different.

http://www.hondaworkshop.com/misc/crx_headlight_warning/

Also found one you can buy for less than $20 @

http://www.electronickits.com/kit/complete/Automotive/VEK3505.htm

I was wondering if there's a way to convert the seat belt warning alarm components and use them for a headlight alarm? Just a thought...

IMHO, it would be easier and smarter to do the one that you found on the Honda website. In the fusebox, you just have to hook up one lead to the headlight circuit, like at the fusebox, and hook up the other lead to a circuit that is energized through the ignition switch. (Sorry, I'm away from home and don't have a FSM readily available to suggest circuits.)

Many years ago when I found a piezo type alarm, I recall that I had to use the headlight circuit. The parking light circuit didn't work for some reason, and I never tried to track down why.

By the way, I have one of those cheap Radio Shack piezo buzzers in a drawer in my garage waiting for the day when I might want to install it.

If I wanted to get really fancy, I would use two relays. One coil would be connected to the parking light circuit. The other coil would be connected to a switched circuit. The piezo buzzer would be wired with constant 12VDC on one leg. The other leg would go through the normally open contact of the first relay and the normally closed contact of the second relay. That way if the parking lights were on while the ignition was off, the circuit would be complete, and the buzzer would go off. Heck, I could even make a plug and play version. You don't want to play the cost of it, though.

Steve

http://www.classiczcars.com/forums/showthread.php?threadid=39589

http://www.classiczcars.com/forums/showthread.php?threadid=39589

Okay, you got me. What does that have to do with a buzzer for the headlights being on?

I had one of those buzzers on my '77 Honda Accord. Annoying sound, but it worked. It was only a couple dollars back then.

You could probably hack it by running the output through a transistor instead of that piezo buzzer, and have it turn on the seatbelt warning buzzer. I'd use an opto-coupler Darlington.