928 Starter Motor - connections help!

[thesmithsUK]

Hi all.

I'm replacing the failing Bosch starter motor in my 4.5L 928 with a new, high-torque unit from Powerlite.

The new unit has two terminals: the larger one for the positive battery connection, and a smaller one for the ignition connection.

Simple, right?

Except that the old unit has three connections!

See new and old pics below.

Any advice on how to resolve this?

 

[thesmithsUK]

OK, so I've established that the yellow wire is the trigger wire.

And that the (badly frayed) brownish wire above it goes to the ballast resistors - to bypass them when the starter is engaged (to give a bigger spark).

I don't think this is necessary with new, High Torque starter motors but do I:

a) just disconnect it, or
b) add it to the same terminal as the trigger wire?

 

[thesmithsUK]

Well, I've answered my own question (!) but posting here in case of help to any other 928 owners...

I disconnected the wire to the ballast resistors and bingo!

My, what a difference a new, high-torque starter motor makes. Like the difference between analogue and digital!