peugot partner/berlingo

[libby lou lou]

Hoping for help with this one, 57 plate, i changed the comms unit about 8 months ago as the horn would not work,replaced with a comms from a breakers.
Stopped working again pretty soon after. What is happening now,and may have been this way for a while, when the engine is running/driving, no horn, but when stopped with no ignition on, the horn works, ask at the mot bay, not a clue, is it a faulty relay somewhere, though i can't understand how it would still work like this, thank you.............

 

[Burnerman]

Designed by the devil himself, Libby - purely for our benefit of course! I reckon you need another comms unit or get that one sorted from the likes of BBA Reman.
Usually the airbag lamp flashes when you press the horn on these.....does yours?
John

 

[libby lou lou]

Thanks for your reply John, no, airbag light is fine,will have to find another comms, cheers John.....