The 'E' Type Forum

Thank you for the response, now know what the mystery wire is for. With regard to the bonnet harness I have ordered the wrong one for my car. I have external horns which means I should have ordered Bonnet Harness JL120 not JL119 which is for the earlier cars with the horns inside the bonnet. Hoping ...

First time using this site, so here goes. I have a RED/yellow wire at the bonnet plug and no corresponding colour code at the bonnet harness. I cannot find this colour code for the bonnet in my copy of the wiring diagram. Does anybody know what this wire might for? It also appears at the dash, but i...