Funtime wrote:I've looked everywhere, is there a cad version of the s4 wiring diagram out there, I want to edit it to show my modifications, cooling fans, electric fuel pump, headlamp lifter etc.
Thanks in anticipation
Sorry, can't help with that but have you any knowledge on how the horn is wired (1970 Sprint)
The horn works fine off the car.
I always thought the horn push put an earth on but one of the wires to it is an earth.
I get 12 volts from the fuse ok but when I put the meter on the other wire to the horn I get 0.11 Volts.
I'm guessing the might be a relay somewhere.
The car is negative earth therefore is the steering column button putting a positive or negative feed on.
I've not had the car long but it looks like someone has been playing with the wiring.
David