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Old 02-17-2011, 08:58 AM
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No Horns

1987 corvette, have replaced the relay and checked or replced all fuses, never did find one that indicated in was for the horns, also checked the steering horn button, cleaned and is clicking the new relay in the dash, replaced both horns, still have no horns, help.

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Old 02-17-2011, 09:14 AM
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Hook the horn directly up to a good battery. Does it honk?
If it does, is power getting to the horn through the cars wiring? Check for power at the horn wire.
If it has power, at the wire, check for power, on the body of the horn, with the test light. If you have 12 volts there, bad ground.
Read this, it is good information on basic electric troubleshooting:
http://www.vernco.com/Sparks/id606.htm
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Old 02-17-2011, 10:02 AM
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No Horns

Thanks for reply, no power at the horns, battery is good, have tested horns on the car with separate source of power, they are new and do blow, no power getting to the horns, green/wblack stripe and black on the horns, both sides, I believe they are part of the vette alarm system if this has anything to do with it, can't back trace the wires on the horns, and not sure if there is an inline fuse somewhere, making me crazy.
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Old 02-17-2011, 10:05 AM
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The relay could be bad or wired wrong. Use a meter or test light at the relay to see if current is leaving it when the horn button is depressed.

If the current is leaving the relay, it's a pretty good indication the wiring to the horns is open- either broken wires or open fuse.
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Old 02-17-2011, 10:16 AM
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No Horns

Yea, that's what I'm thinking too, the ralay is good, not sure about an inline fuse after the relay?
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Old 02-17-2011, 10:23 AM
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Quote:
Originally Posted by Tom1987
...not sure about an inline fuse after the relay?
There may well be- the horns draw a significant amount of current, so it wouldn't surprise me if there were a fuse or possibly even a fusible link.

A fusible link can be tricky to find, sometimes the wire inside the insulation will be open, but the insulation itself intact. Look for a change in the wire color, diameter or evidence of it having a splice in it- that's a likely place to find a fusible link.

The horns have a good ground, right? If there's a single wire powering it (them), the ground path is through the horn mount into the chassis.
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Old 02-17-2011, 12:02 PM
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The following VATS schematic is for a '88, I believe- but it may be similar to your '86, at least enough to be of some use.

It appears this is tied to the horn.

http://members.shaw.ca/dankai/Vats%20Electrical.pdf
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Old 02-17-2011, 05:14 PM
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No Horns

OK, thanks to my local car guys, he printed off the wiring diagram for the horns on my 87 corvette, there is a fusible link and additional inline fuse that comes out of firewall at the left side engine compartment behind the battery at the jump port, rust colored link, is visible from top, to dark to get on it tonight but will let every one know how it works out tomorrow, anyone need the diagram shoot me an e mail, I'm going to scan it for posting. Note: it is tied to the alarm system.
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Old 02-17-2011, 05:17 PM
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No Horns

Thanks for the help guys, these things are a pain huh!
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Old 02-21-2011, 09:10 PM
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NO Horns

Turned out to be a bad relay in the dash, it was new, but it was a ba one, all that wire testing at the block wow, green wire at the relay is the one you check for power at the front, horns working great now.
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