horn not working!
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horn not working!
its an 88 vert and for some reason my horn is not working. i have the horns from my t2 and i tried them out lastnight but nothing. is there something else i should look for?
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...there's a fix for this that's been discussed here before. It might even be in the FAQ's. You have to remove the CPU, drivers side interior. The contacts on the board become fouled and corroded, or the solder joints let go. I had this problem and just cleaned the contact pins with spray contact cleaner. Others have actually desoldered and resoldered the contact pins. Search the forum and you should find out the details.
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My solder joints were bad, so I just bypassed the CPU entirely. It's not like the horn needs to run through the CPU anyway. The guys that designed the FC... well.... God Bless them is all I can say. :-P
Cheers,
Cody
Cheers,
Cody
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Originally Posted by iSP33D-for-J3SUS
My solder joints were bad, so I just bypassed the CPU entirely. It's not like the horn needs to run through the CPU anyway. The guys that designed the FC... well.... God Bless them is all I can say. :-P
Cheers,
Cody
Cheers,
Cody
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Originally Posted by CyberPitz
Hmmm, how abouts did you do that?
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Horns are a walk in the park.
You push the horn button. That puts a ground on a wire coming out of the steering wheel assy that goes to the CPU.
That wire applys that gnd to a Relay, which in turn pulls in and pulls a set of contacts together. One contact is hot and the other goes to the horns. Beeeeeep. Hoooonnnnk.
So heres the deal. Get the FSM wiring diagram out. Find the HORN wiring. Find the color of the wire leaving the horn switch. Find that wires color on the CPU.
Get a piece of wire and ground one end. Then backprobe that wire you just found going to the CPU and if the key is to ON, the horn should go honk, honk.
No honk? Find the color of the wire that leaves the CPU going to the horn. Apply 12vdc to that wire. Horn will honk if it's connected up.
Horn still did not honk? There's a problem with the CPU. Either a cold solder joint or bad relay.
Wiring diagrams can be found somewhere in the following links :
https://www.rx7club.com/forum/showth...ght=photobucket
http://www.wankel.net/~krwright/fil.../parts_manuals/
http://wombat.sevarg.net/RX7/RX-7_Training_Manuals/
http://www.cochran-racing.com/FSM/index.html
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You push the horn button. That puts a ground on a wire coming out of the steering wheel assy that goes to the CPU.
That wire applys that gnd to a Relay, which in turn pulls in and pulls a set of contacts together. One contact is hot and the other goes to the horns. Beeeeeep. Hoooonnnnk.
So heres the deal. Get the FSM wiring diagram out. Find the HORN wiring. Find the color of the wire leaving the horn switch. Find that wires color on the CPU.
Get a piece of wire and ground one end. Then backprobe that wire you just found going to the CPU and if the key is to ON, the horn should go honk, honk.
No honk? Find the color of the wire that leaves the CPU going to the horn. Apply 12vdc to that wire. Horn will honk if it's connected up.
Horn still did not honk? There's a problem with the CPU. Either a cold solder joint or bad relay.
Wiring diagrams can be found somewhere in the following links :
https://www.rx7club.com/forum/showth...ght=photobucket
http://www.wankel.net/~krwright/fil.../parts_manuals/
http://wombat.sevarg.net/RX7/RX-7_Training_Manuals/
http://www.cochran-racing.com/FSM/index.html
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