Firstly, has anyone got a premier wiring diagram for the sierra loom? It's been so long that I fit mine originally to the pinto that I've lost it


Secondly, my starter motor:



I've just taken it out the car and bench tested it. I connected the fat battery +ve to terminal 2 and then bridged/jumped 2&3... nothing. (this was with battery -ve on the other end of the starter motor)

When I tried battery -ve on terminal 3 the starter engaged (had only managed to get it to spin when it was in the car, so it can do both things i.e. not knackered). Then I tried battery -ve to the other end of the starter and it tried to engage once very briefly. So then I wire brushed the crap out of it and tried again but I can't seem to get it to engage anywhere other than terminal 3. Do I need a better earth for the -ve battery cable?

The body of the starter is the earth , so it should be +ve to terminal 2 , and starter switch to terminal 3 - try bolting an earth (-ve) to one of the starter mounting bolts .

I wired brushed one of the starter mounting threads and bolted the -ve lead on to it really tight but that doesn't do anything

"and starter switch to terminal 3" <== what's that mean exactly. Is that for when I'm bench testing or when it's in the car.

Me is stoopid (wiring n00b ITT)

You should have a permanent live from the battery (via the alternator) to terminal 2 , earth via the motor body , and then when 12 volts is applied to terminal 3 it should engage and turn .
Thats how mine is , and it looks about the same
And dont forget to bung a nut on terminal 1 , its taking all the starting current !

[Edited on 12/8/08 by clairetoo]

Term' 2 is main battery feed (big fat wire from the battery).
Term' 3 is the activation feed from the starter switch (powers the solenoid which, engages the drive gear and connects term's 1+2 internally).

Term'1 in your picture is missing a nut. No wires should be connected to this other than the feed into the moter body as seen in the picture. Without a nut you won't have a connection.

Earth is through the body.

To test put big earth to body. Big +ve to 2.
Trigger it by putting +ve to 3.

adrian

[Edited on 12/8/08 by adithorp]

quote:

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Originally posted by adithorp


To test put big earth to body. Big +ve to 2.
Trigger it by putting +ve to 3.

adrian

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I think Adie meant terminal 1 needs to have a nut !

Sorry, now corrected.

adrian

As above ^^^ It looks as if you are missing a nut on terminal 1.

Ahh I see, there was a thin plate on that terminal linking it to the body of the starter and without a nut it wasn't getting a decent connection. Put the nut back on and tightened it and it now engages and whirrs! ^__^

Result

Got it back in the car now and I've got it all sorted, turns on the key now!

Much thanks for all the help!




Next job: working out why my hazard switch doesn't flash and is always illuminated when turned on...

[Edited on 12/8/08 by Benzine]

^^^^ wot they say.

terminal 1 supplies current, andd lots of it, to the start motor itself.

it needs to have good electrical contact achieve by having clean terminals and connected tightly i.e. by using a nut to clamp it all up.

You wouldn't have had that problem with a BEC!

quote:

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Originally posted by sucksqueezebangblow
You wouldn't have had that problem with a BEC!

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Re the wiring diagrams- phone premier and he'll send you all the info out. I lost mine and he was very very obliging!