General Tech Horns

[KVH]

One of my two horns works fine. The other, second in line, is receiving power and the ground wire is firmly grounded. When I push the horn button a test light on positive wire of my non-working horn lights up. In other words, either my horn is dead (I've not heard what kills a horn) or something else is eluding me. What's internal to a TR4 factory horn. Any ideas?

 

[Trevor Triumph]

Has the second horn worked previously? Internal issues such as burned contact? rusty stuff in the horn mechanism? loose wires? The horn, I believe is three chunks of metal: two parts, sort of the body, and the vibrating diaphagm. Then there is the electrical stuff. I drilled the rivets on a horn, cleansed contacts and diaphragm but couldn't get the enough pressure on the new rivets when reassembling the horn.

 

[NutmegCT]

+1 on Trevor's comment.

The vibrator is likely frozen. Carefully open it up and free the vibrator assembly.

(and be sure to disconnect the wires first ... if you want to keep your hearing!)

 

[KVH]

If I drill the rivets will I have the issue Trevor mentions? My rivet tool was made by Fischer Price.

 

[NutmegCT]

According to my mechanic, the Fisher-Price tool (or a few small nuts and bolts) will work.

Say - is there a tone-adjusting screw on your horn? If so, have you tried turning it back and forth? Might free up a frozen mechanism.

 

[KVH]

I did spin that screw, but maybe too gently. I’ll whirl it around a bit and try a new horn if need be. Thanks much—

 

[Trevor Triumph]

Buying new horns is always an option. I replaced mine years ago when prices were a a bit lower.

 

[KVH]

Moss makes it appear they sell an exact replica. Wonder where manufactured.

 

[Trevor Triumph]

I got mine at O'Reilley's or wharever the name twenty years ago.

 

[poolboy]

Here's what Dan Masters says:

http://www.advanceautowire.com/tr2506/Chapter%2019%20-%20Horn%20Repair-Rebuilding.pdf

 

[KVH]

Are the rivets really an issue getting the horn back together do you know? My track record messing up parts isn’t exactly honorable mention.