Where can I get my hands on a horn relay for a 1970 Duster? This one has the 4 terminals on the relay for the key-in-ignition function. All the parts stores (Advance, Autozone, NAPA) show are the ones with the 3 terminals. I had no idea this would be such a difficult item to locate!!!

Have you tried rockauto.com? They usually have all the varieties of one part.

Thanks for the reply. I did as you suggested, but they showed nothing for a horn relay.

Anybody else???

I think one the ebay ones I gave you by the email will be definitelly the best option.

If I found the way to ship it cheap up to you the NOS one I have, will let you know

OK, I appreciate that, Nacho. It appears that these are not available through any parts stores, nor any of the vendors that I checked here on Moparts.

Thanks, DirectSubjection! So, you can see my predicament. If the 3 prong ones are available, why not the 4 prong ones?

Are these maybe used on other vehicles (not necessarily Mopars) that I could do a search for?

Look at the ECHLIN relay #HR131 from NAPA. It is a 4 prong relay that looks like my horn relay. It has a bracket attached ,but that can be cut off if not needed.

Shadetree72, I believe you found it!!! May I ask, what did you do to locate this? I did a search on NAPA's website using several years of Mopar horn relays, but none were located that looked like this one. Most were the 3 prong version.

I searched "relays" in general and started looking at all that were listed until I found the one that looked like what I had. It worked as far as a horn relay, but I don't know about the key buzzer as mine didn't work when I got the car-72 Challenger. My relay plugs directly into the fuse box, I'm not sure what your setup is. Good luck, hope this helps.

The reason I need this relay is because I want the key-in-ignition buzzer to work. My Duster has a Painless fuse block wired into the underdash harness, so it has it's own horn relay. But, to have the buzzer work, I must have this relay, too. I know why my buzzer isn't working. I found a broken wire in the steering column, the wire that feeds the buzzer.

Thanks again for the help!

I can't speak for the Echlin part but it cross references with BDW part R218 available at Advance Auto. I found this thread trying to track down a horn relay for my 71 Challenger.

It is a very close match to the original relay and DOES include the key in buzzer.

The relay fits in my fuse box and works with no modifications. But there are 2 slight differences which could easily be fixed to make it a closer match. The bracket, on the BWD part at least, is held on with what looks like 3 small peened over mounting studs, which could be easily ground off. And three of the blades (the three in a group on one side) have slight steps at the base making them a tad too wide for it to fit in the fuse box flush, again easily fixed with a dremel.

But again the part fits (mostly) and works in my 71 Challenger as is. Thanks for this thread it helped get my horns going again after 9 years, since some jackass at a shop removed mine to kill the key in buzzer, and then proceeded to loose it.

Glad to hear this helped you. When I get enough time (and the weather lets up a bit!), I will get at the Duster. Hopefully my issues will be cleared up, as well.