87siuguy

Before today my horn would just go off on its own. it would go off when i accelerated hard and when i would make right turns. it wouldnt go off when i pressed the buttons on the steering wheel. just today when i made a right turn it started to go off as usual but when i straightened out it didnt stop. i pulled over and it stopped, then when i started driving again and make a right turn, it did the same thing, started to go off and didnt stop till i pulled over. i have to fix this soon because i cant go on driving with the horn goin and im not gonna be able to just make left turns everywhere i go so if someone could give me any suggestions on how to fix this it would be awesome. also my car is an 87 if it makes any difference. thanks

WAYNE88N/A

Bang on the CPU (aft of the cabin fuse box) when it's acting up & see if that helps (the horn relay is in there). If not, the steering wheel switch may be sticking...

casio

unplug it for the time being. i have NO idea how to fix it, but it takes seconds to unplug. *temp fix*

87siuguy

how would i go about unplugging it cause it doesnt work when i want it to so its pointless to have it hooked up till i can fix it permantly

WAYNE88N/A

Taking the connectors off of the horn units up front would work (make sure you isolate them from ground)

89tracerman

the wire may be loose so when the car (steering wheel) moves it causes the wires to touch and it stayed honking cuz the wire got stuck. this happened to a hyunday my dad owned so he decided to just cancel the horn.

casio

exactly, so unplug it.
and its a sealed connector, so i doubt it will hit ground. the horn has the male side and i believe the wire is a covered (so it cant ground out) female end.

87siuguy

where is the horn located because i want to just disconnect it for now

satoacs

omg is this guy serious?!?!?
do you know what a horn looks like? j/w...no offence
if you can, take the front panel off of the steering wheel, then you should see a wire going from the horn button on the face of the steering wheel to a hole in the base of the steering wheel, if you can take out the wire and make sure the connection is on right and you dont have anything metal touching the contact in the wheel. this is the caseon some older vehicles, not sure about the RX7 though. just in case it helps

sar

iTrader: (1)

isnt there a relay for the horn in the main fuse box under the hood near the drivers side fender?

casio

between the radiator and the front bumper. kind of in front of the radiator's overflow bottle (on my car anyways; 91 N/A). it has a single wire going to it. its circular, black, and sorta flat. i dont remember if theres one or two. theyd be near one another, though. you should be able to hear it.

sar

iTrader: (1)

I think theres two. On the red one that is not mine anymore 1 was dangling in the front and the other was laying in a parts box.

87siuguy

thanks everyone im just got this car a month ago and dont know anything about it yet so i appreciate the help

satoacs

oh...that answers my question

13Beast REW

EDIT: I'd previously attached this to the wrong thread

I've removed the horn buttons from my steering wheel and disconnected the wire that connects the buttons. I've also slipped some paper between the spring loaded contact on the back on the steering wheel that carries the current down to the CPU. I just replaced the CPU with one from another 86 N/A. (Mine is also an 86 N/A). Whenever I connect the CPU the the horn goes off and wont stop. I removed the horn relay circuit board from the CPU casing as can see the contects on the relay mate when I connect the CPU connector. I've been trying to follow the circuitry of the board to figure out which pins on the connector are receiving current when they shouldn't but I'm having difficulty with this. Over a bit more time I may be able to figure it out on my own but I'm wondering if there is something more simple that I may be missing. My car also always shows a low voltage on the stock volt
meter when running only barely going above 12 volts so that shows that there must be either a load or grounding issue some where else in the car. I've redone most of the major grounding and still have the low voltage/horn problem.

13Beast REW

I've done some troubleshooting since my previous post was orginally made yesterday. I've determined that there is a short in the vehicles wiring somewhere between pin 2 and pin 1. I plan on fixing the stock wiring but for the moment, to get through inspection, I'll be running a new wire from as close to the horn as possible back to pin 2 on the cpu sub harness. Following the wire from the CPU through th harness is proving to be difficult due to the tight space but I'll have it done eventually. In the mean time though, is anyone familiar with a location in the harness that is likely to be causing this issue? It may just be a fluke incident with my car as I'm unable to find an exactly matching thread with my issue. Just trying to save myself a little unnecessary work while I can.

ColinShark

I'm assuming you're advanced enough to know, but just in case, it could be your buzzer going off from low coolant or oil.

It sounds loud from the cabin when the engine's not screaming, and it will go off first on turns or acceleration, and get progressively worse, like you mentioned.

Mine was going off after I first bought my car, and I thought it was the horn at first.

sectachrome

this happened to me before. turns out there was a screw loose in the steering wheel that would rattle around and complete the circuit for the horn. hear anything rattling when you turn the wheel?

13Beast REW

Mine is most definately the horn going off due to bad wiring.