Alternator Terminals

[Isimmo]

Any chance anyone has got a photo or drawing of the alternator with the cables attached? (Ur or Similar)

I just need to confirm their positions, earth and any seals etc.

Many thanks in advance.

Ian

[Donswan]

Originally Posted by Isimmo

Any chance anyone has got a photo or drawing of the alternator with the cables attached? (Ur or Similar)

I just need to confirm their positions, earth and any seals etc.

Many thanks in advance.

Ian

Hi Ian,

did you get an answer to this?

I'm having problem with my alternator, I recently had a re manufactued one fitted and its not charging but I have noticed a loose blue wire at the back, it looks like it should go to a blade terminal but there is nothing there to plug it in to, any ideas?

Thanks,

Don

[4v6]

Originally Posted by Donswan

Hi Ian,

did you get an answer to this?

I'm having problem with my alternator, I recently had a re manufactued one fitted and its not charging but I have noticed a loose blue wire at the back, it looks like it should go to a blade terminal but there is nothing there to plug it in to, any ideas?

Thanks,

Don

Blue wire is "alt ind" for the dash light iirc.

[Phil Payne]

Originally Posted by 4v6

Blue wire is "alt ind" for the dash light iirc.

Also field excitation - if it's not connected (to the M6 terminal with an M8 nut) the alternator won't charge.

The ur-quattro is not a good source - different model years are wired differently. The 20V wiring diagram is the best - the alternator is shown as not even connected:

http://www.isham-research.co.uk/quat...yp85/47_01.png

[msh]

Originally Posted by Phil Payne

Also field excitation - if it's not connected (to the M6 terminal with an M8 nut) the alternator won't charge.

It will, but only when turned at speed enough high for self-excitation.

[Phil Payne]

Originally Posted by msh

It will, but only when turned at speed enough high for self-excitation.

Some will, some won't. The 90amp ones always seem to do it. There was a change to the harmonic damper 'pulley' as well that made the alternator spin faster on later cars.

ETKA tells porkies about alternators. When Simon Gilmore's failed in Heidelberg none of the versions listed in ETKA would fit and Bosch was out of stock - so they rebuilt his old one overnight. Bosch service in Germany is nothing short of stunning.

[Donswan]

Thanks for the advice chaps...the battery light was out, I rigged a connection up between the blue wire and a post on the alternater and it came on, just need to charge the battery up now and see if it holds the charge. it's a 90 amp unit and there was no male blade terminal for the blue connecter to plug in to....

[Phil Payne]

Originally Posted by Donswan

it's a 90 amp unit and there was no male blade terminal for the blue connecter to plug in to....

Yup. See http://www.isham-research.co.uk/quat...yp85/22_01.png track 12 - the bit that normally connects to the alternator is usually black (sw) from D+ to T1c - from there on it's blue (bl).

It's not that intuitive, but the drawing of T1c does show the black wire being male and the blue female. T1c is usually tied to the chassis rail just behind the right headlight.

[Donswan]

Thanks Phil, I probably should have mentioned I have an 1985 100 (C3) but I'm guessing its the same set up, cheers Don

[Donswan]

Originally Posted by Donswan

Thanks for the advice chaps...the battery light was out, I rigged a connection up between the blue wire and a post on the alternater and it came on, just need to charge the battery up now and see if it holds the charge. it's a 90 amp unit and there was no male blade terminal for the blue connecter to plug in to....

Charged the battery overnight, connected up blue wire and the battery light come on, started her up but still not charging or holding a charge, battery light staying on...it's a remanufactured unit from ebay, do you think it's a duff unit or is it incorrectly wired up?

I have an 1985 100 (C3), cheers Don