thePoint

I am an obsessive-compulsive! Still trying to get my '85 SE on the road.

Took everyone's advice, grabbed my volt meter and started tracing the wiring. I have a button ready to install, but I'm wanting to FIX the problem before I bypass it.

I am trying to find the horn relay. I have the Haynes manual, and picked up the on-line wiring diagrams. They show the '85 with a horn relay mounted on the ecu??? Can't find it. I have spent a considerable amount of time upside down in the drivers seat looking under the dash - yuk!

In chasing my wiring woes, I have remedied several other problems that were caused by the wiring being messed with over the earlier years of it's life. Im pretty happy about that! I have found several wires that were broken, twisted together, and wrapped with electricians tape. Fixed that and all of my courtesy lights work!

Too long already! Where is the horn relay????

Thanks

Paul

ronarndt

I suspect the horn relay problem on the first gen is the same as on the second gen RX-7. Your relay is a part of the circuit board in the ECU. The solder connections on some of the circuits become cracked and do not make a good electrical connection. The way to fix is to replace the ECU or to carefully re-solder the connections. I had to do this on an 87 that I owned a few years ago. If you are lucky, you may be able to use a magnifying glass and spot which connections don't look good. Otherwise, you need to do them all. Use a good instrument grade soldering iron and electrical grade solder and have fun! If you have not done this type of soldering before, practice on something that does not matter if you mess up. Overheating will probably be your biggest problem, since you can burn through the board or loosen connections you don't want . There must be 70-80 spot solder connections on the circuit board. Good luck.
Ron A.