Hello all!

I got a old classic car horn for my birthday and I am trying to hook it up. There is a something jacked up with the original horn because the original owners unhooked the factory horn. Does anyone possibly have a diagram, or know where to locate the relay?

Thanks so much,

 

The relay is wayyyy down low, and well forward, on the inner fenderwell...RH side.

This will help you figure out why the circuit isn't working:

Horn Circuit Checklist

You shoold post in the "Series I-II-III XJ6/12" section rather then the XJS section

For a good diagram down the "S57 Wiring Guide" from the top of the Ser I-II-III section. It's in the sticky thread titled "How To" or somthing like that

Cheers
DD

 

that is weird it would be unplugged. The diagram is super simple. Even thought its an XJ6 and not an XJS, I can tell you basically hit the horn button, which make a connection to the relay. The relay has a ground on one side to complete the connection and when this happens power is sent to the horns.

That checklist is probably all you need. Check the relay and check for power and ground where it plugs in to determine where any issue may be.