Lotus Elan

Alternator wiring diagram

PostPost by: John Larkin » Sat Jul 04, 2009 8:16 am

Does anybody have a wiring diagram that shows the changes needed for an alternator in place of the original generator?

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PostPost by: Jason1 » Sat Jul 04, 2009 9:38 am

50/0951 1968 Wedgewood blue +2, 1990 Mini Cooper RSP
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PostPost by: neilsjuke » Sat Jul 04, 2009 4:30 pm

First is your car neg or pos earth and what alt do you have
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PostPost by: John Larkin » Sat Jul 04, 2009 5:34 pm

The car is negative earth, and an alternator was installed by a garage about fifteen years ago. The wiring modifications that they did are agricultural, and I want to tidy it up. I need a wiring diagram to feel confident about doing this.

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PostPost by: neilsjuke » Sat Jul 04, 2009 6:12 pm

Hi this depends on what Alt you have Lucas ? how many terminals output amps ( size of wire)
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PostPost by: John Larkin » Sun Jul 05, 2009 5:27 pm

I have a Lucas alternator, 60 amp rating. There are two wires connected to it --- brown/yellow (a big cable) and brown/green (medium sized cable).

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PostPost by: neilsjuke » Sun Jul 05, 2009 9:22 pm

Do you have a ampmeter fitted
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PostPost by: John Larkin » Mon Jul 06, 2009 5:13 am

I don't have an ampmeter.
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PostPost by: neilsjuke » Mon Jul 06, 2009 11:37 am

Here you you go the D wire large brown/white from the control box would have been 28/012 =17.5 Amps and will not take the current /Amps the warning light 14/012 is ok . So bypass the control box and go to the solenoid ,You do not need a 60A alt for a elan a Lucas 17 ACR 36A or the 25A (derated would be fine) are you sure you have a 60A check the numbers have a look at the diagram link below I have put the wire current rates on it I would use 65/0.30 or 97/0.30 / 97/ .012 (= 97 strands of 0.30 or .012 in old money wire). This will be ok as the elan will not draw the current .

http://www.flickr.com/photos/[email protected] ... 202952079/

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PostPost by: John Larkin » Mon Jul 06, 2009 4:32 pm

Neil, thanks for the wiring diagram. I'll check the ammeter rating. I know that I bought a 60 amp unit two years ago at the time that I replaced the Elan's alternator, but it may have been for my other old car.

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