bigblue wrote:OK folks. Thanks for all your replies. It's a, 89 1.9 petrol DG watercooled engine. I've been told the red wire from the alternator should connect to the solenoid but not sure which connection of the three.
A. The rear 'spade' connection that goes to the starter.
B. The front small bolt.
C. The centre big bolt.
Can anyone direct me to a wiring diagram?
The ring terminals on the red alternator wire should connect to the top stud terminal on the solenoid (see pic below), shared with the thick battery feed lead. That's how the charging current from your alternator makes its way to the battery under your seat box.
Photo by Carpmaster on an older thread
The spade connection is the wire from your ignition switch that triggers the solenoid to pass the high starting current.
As Kev says, the wiring diagram in the Haynes is very clear. Well worth having.