The largest wire charges the battery. Are your other two wires colored the same as mine, (brown/yellow and brown/green) and where do they go on your car? After rewiring at the firewall and fusebox (after some original wiring and my fusebox melted) my engine starts, but won’t turn off after turning off the ignition key. I have already ascertained that the ignition switch is not at fault. The alternator is apparently keeping the engine running after the engine should turn off. It won’t stop until I pull the main wire off of the coil! I have obviously rewired something wrong, and the Elan S4 wiring diagram is “less than an accurate representation” of how I believe my Sprint was wired when I bought it 20 years ago.
Gary
'71 Elan Sprint RHD
Miami, FL
(Have I invented a perpetual motion machine? … assuming I have an endless supply of petrol.)