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Old 07-30-2008, 11:55 AM
F&J F&J is offline
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66 mustang; horn blows when clutch is used..

A friend is bringing the car over tomorrow. (1966 Mustang conv) He's in his mid 70s and has restored 28 cars so far ... So, he knows how to look for obvious stuff like the clutch linkages chaffing on a wire harness.

It won't do it every time you push the clutch, maybe just once or twice during a short trip around town.

The car is a convertible if that could possibly matter, and the car was never a rustbucket and never cut apart & welded.

Any ideas?
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Old 07-30-2008, 12:51 PM
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The horn blows when the clutch is pressed? That's awesome!

[a good hard laugh]

Look and see if the horn wire is getting pinched by the clutch pedal. It might be that the pedal or linkage has worn a hole in the wire jacket so that the wire gets grounded when the clutch is depressed.
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Old 07-30-2008, 02:25 PM
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Quote:
Originally Posted by Sir Joab
The horn blows when the clutch is pressed? That's awesome!

[a good hard laugh]

Look and see if the horn wire is getting pinched by the clutch pedal. It might be that the pedal or linkage has worn a hole in the wire jacket so that the wire gets grounded when the clutch is depressed.
He has already looked for that. He was thinking there may be some flexing under the dash when the clutch is pushed. That flexing might affect the column?

I was asking here because there are some guys who are up on the early mustangs. There may be someone who had this problem.
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Old 07-30-2008, 03:07 PM
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Check at the engine side of the firewall where the black wire comes out of the steering column.
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Old 07-30-2008, 03:43 PM
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The wire from the horn button or ring, out to the horn, is a ground. Somewhere along the line you've got some rubbing through on the insulation on the wire, activated by the clutch linkage.
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Old 07-31-2008, 11:44 AM
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The black wire runs from the horn cap down the center of the steering shaft and it exits by the firewall via a brass and plastic disc, it then runs to the relay and horns. If the horn sounds when the clutch is push ALL the way to the floor, then the firewall is probably flexing. If it sounds anywhere else, it is a wire rubbing the clutch linkage. Apply some shrink tubing to the wire at the bare spot.
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Old 07-31-2008, 12:18 PM
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Quote:
Originally Posted by Sir Joab
The horn blows when the clutch is pressed? That's awesome!

[a good hard laugh]

............
Thats what I was thinkin Shift Indicator...lol it does sound like a short /flexing to me also.

Shane
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