Is there continuity and zero resistance on both of the main cables between the alternator plug and the solenoid? These cables include a fusible link in the injection cars.
This:
The voltage is steady at 12 volt on the exciter wire then when it is plugged in to the alternator it goes straight to earth.
Is what's meant to happen. The earth it's finding is through the alternator circuit, that's how the ignition warning lamp works. If it didn't find earth there the lamp wouldn't light.
Edited by Dan, 06 December 2013 - 08:28 PM.