If this has been asked before - apologies.
The overdrive has never worked on my 1974 MKIV Spitfire. Today I took the plunge and removed the gearbox tunnel. Does anyone have a wiring diagram the only one I have includes a relay.
From the switch in the gear-lever one wires goes to earth. The other switch wire goes to the solenoid. A wire then goes to the gearbox isolator switch from the solenoid. There is an wire that comes from the engine bay (wired into the ballast resistor) which is attached to the gearbox isolator switch. Is this correct?
please see pictures attached
Thanks Barry