Got the horn to work with Grant Wheel

[ramsesosirus]

After not having an operable horn for a few years, I decided to try to figure it out.  It's such a simple thing, I'd feel guilty if I couldn't get it working.

Plus, you never know when using it could save the car or someone else from injury!

My car is an (early) 1976 280z, so others may be different.

Basically, what has to be done is:

Bend the horn contact tab out further, so it always is touching the metal plate on the back of the Grant adapter.  It will not contact it if you don't bend it or modify it in some way, there is a gap.

The single wire that comes from the Grant adapter will need to be routed through the proper holes in the adapter plates, then connected to the middle (positive +) electrical tab on the back of the Grant horn button.  My Grant button has two connectors, a center one and an outer one.  The outer one is marked as ground.

If you connect it to the outer (ground) tab, the horn will constantly sound when installed.(when the metal tab touches the metal, won't do anything when the horn button is hanging free)

The small metal tab on the side of the horn button (not the full rinig) contacts the metal of the wheel/adapter and completes the circuit, I had to move mine below the inner coil as it had popped up one coil.  

It took some trial and sounding of the horn to figure out, but overall, it is fairly simple.

Now my horn works only when I press the button!  

Let me know if you have questions, it seems like others have this issue with aftermarket wheels so I thought I'd contribute since I've gotten so much help from others on this forum.

 

Edited May 15, 2016 by ramsesosirus

[TomoHawk]

That's why I took the time to put together a buzzer with a blade terminal and a ground clip.  It's quieter than the horn.  I also use it for probing the other connectors.  Don't forget to use the grease they give to to lubricate the copper ring and the button.

The fun thing was to get the right hole for the pin that turns the turn signal off, and to get the wheel on so it's centered wit the wheels.