Gator911

I just installed my 3 spoke wheel and the horn works when the car is off but not when it is on?

What's the deal?

wross996tt

My guess is you plugged it in backwards.

michael.s.under

That is very wierd...... I have never used mine, but if it didnt work it would concern me that the airbag wouldnt work!

Gator911

What's backwards? It looks to fit one way?

Can someone else add to this?

Tool Pants

This happened to a Boxster owner after he replaced the dash. http://www.renntech.org/forums/index...=14923&hl=horn

Not the electrical guy, but there are 2 wires for the horn and you really cannot hook them up wrong because they are different lengths. One wire goes to the steering wheel and the other goes to the horn plate. These 2 wires create a ground so even if you could reverse them it would not matter.

Gator911

Thanks for the link.

It looks like no solution was found on his end yet either. Im going to dive deeper today so If anyone have any ideas, PLEASE let me know!

This is the strangest thing I've seen

redridge

put the original wheel back on, if it works, then its the 3 spoke wheel. If it doesnt. then its an elec issue... check the relays, make sure theyre in the sockets securely

Gator911

It doesnt make sense though. The horn BEEPS when the car is off? Im not exactly sure how the horn system works but im assuming that when you press the pad, it completes a circuit, therefor sending power to the horn....

The horn is connected directly to power all the time(not switched power) so that it can work when the car is off AND on.

Where in the circuit of the horn system could there be a mishap that causes the horn system to work off of SWITCHED power rather than CONSTANT power?

-Keith

TheSpeedDemon

Just curious...is the 3 spoke a factory unit or a 3rd party unit? If 3rd party, did it have any speical requirements for the horn to function?

Like you this doesn't make any sense as it shouldn't matter if the car is on or off, it should work at all times.

Gator911

It is a factory unit with factory airbag....

Doug Donsbach

What year is the car?

Riad

And my mirrors controls are completely reversed (thread already started on that subject) so, um yea.

Gator911

99 C2

Tippy

I know American cars work that way.

Bad grounds cause incorrect travel of electricity. They always take the shortest path so maybe when the key is on, somehow, power is grounding through another circuit? **shrug**

I feel for you, these things can cause headaches.

Doug Donsbach

That's just odd. Just spent a few minutes with the schematics, and I can't see how that happens, because:

- Horn relay contacts and coil are supplied with constant-on fused power via 25A fuse #3 in fuse holder B.

- Horn button simply grounds the other side of the relay coil, pulling in the contacts and supplying horns with the fused power.

It doesn't get much more simple than that. The wheel isn't by chance a tiptronic wheel, is it?