I wanna bigger horn!!

[BlueBlingo]

Nice to see you have sorted after market fitting out Geoff.

I have attached wiring diagrams relevent to horn to help other members if they are thinking of fitting aftermarket horn.
diagrams are for my berlingo with a RPO No of 09804

I have also included Vehicle Earth points which might have helped you sorry for not including it.
Horn`s earth point is MC11 (Behind LHS Headlamp Assembly) This Earth not only Earths horn Unit but also BSM ( Eng Compartment FuseBox) So if you cut yellow/green wire near to BSM its lost an earth this would explain Wipers running,Stop light coming on etc.

If you look at attached PDF Legende CAN wires are single colours either Light Blue or Light Green or Dark Green.
V.A.N wires are again single colour being either Dark Blue,Orange or Red.
C.A.N or V.A.N wires tend to be twisted together thru the loom to impede interference from other wires within the looms.

Anyone need any diagrams for towbar fitting etc place a post with as much vehicle information try and include RPO No also P.M me and I will try and sort out diagrams + info for you
My RPO No is on a sticker below the RHS `A` Post