One of my customers has a problem with drivers damaging the reverse alarm so they dont have to listen to them buzz all day.

Today I have fitted another new alarm as the driver has piereced the speaker in the old one.

The alarm still doesnt work, I have found the reverse alarm relay and if I operate the relay manually (by removing the plastic and pressing the contact) the buzzer works.

The relay is not getting any signal from the ecu?

I have connected pathfinder and done the usual checks for the light(buzzer) settings and all seems fine.

The relay has an earth and im assuming the live is supplied by the ecu, I have checked the wire up to the ecu and all is good.

I have tried my ecu on another truck and the buzzer works fine.

Would anybody have a wiring diagram or any suggestios.

Thanks