Delco alternator w/ Lucas ignition switch and ammeter schematic - Defender Source
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  #1  
Old June 24th, 2016, 12:03 AM
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Michel Bertrand
1991 110SW 200tdi, 1963 109 2 door
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Delco alternator w/ Lucas ignition switch and ammeter schematic

Hello to all of you,

I am trying to rewire my ignition/alternator circuit for my SIIA. I have the GM alternator, a Lucas ignition switch from a 71, and the ammeter.... Does anyone have the homemade wiring diagram around that could be scanned? I can't figure what goes to where... Thanks,

Michel
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  #2  
Old June 26th, 2016, 06:55 AM
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Paul Dunn
1971 Series IIA 88
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From TeriAnn's site:


The Delco 10-SI and 12-SI Alternators
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Old June 28th, 2016, 07:36 PM
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Daniel Smith
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In addition to the picture above, you might need a different ammeter. If the alternator can supply more current than the ammeter can take, it will blow. When it does you will not be charging anymore (and you might have a fire).
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Old June 28th, 2016, 07:50 PM
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only if you are drawing that much. Which will very rarely happen on that vehicle.



Quote:
Originally Posted by red64chevelle View Post
If the alternator can supply more current than the ammeter can take, it will blow.
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Present:
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Old June 28th, 2016, 08:22 PM
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Quote:
Originally Posted by red64chevelle View Post
In addition to the picture above, you might need a different ammeter. If the alternator can supply more current than the ammeter can take, it will blow. When it does you will not be charging anymore (and you might have a fire).
That's silly. Of course it won't blow. It'll peg high but that's all. If you mean the alternator will blow that's wrong too. You can certainly use the 2A ammeter. I do and with a 65amp alt it has not pegged ever.
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Old June 30th, 2016, 10:15 PM
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Michel Bertrand
1991 110SW 200tdi, 1963 109 2 door
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ThanksPaul for the drawing to TerriAnn's diagram. I still am trying to figure out the relationship between the ignition switch, the Ford Solenoid and the GM alternator. I know, my 109 looks like it could belong to the adopted son of John Snow and Ramsay Bolton... If anyone is willing to play connecting the dots to help me out, here's a drawing of my various components I am trying to connect together. I wrote a letter next to each post/connector.

Thanks,

Michel
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Old July 1st, 2016, 05:18 PM
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Paul Dunn
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This is how my late IIA ignition switch is wired:
If you look closely at the back of your ignition switch you'll see that the terminals are labeled 1 through 4. Position #1, the double terminal at the top in this photo is 12v in. #2, as you turn the key clockwise, is ignition on, +12v to your coil. #3, the single terminal at the bottom is the momentary switched position, +12v to your starter solenoid. Position #4, the double terminal, turning the key counterclockwise from the off position, is the auxiliary power position.
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  #8  
Old July 2nd, 2016, 11:52 AM
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Michel Bertrand
1991 110SW 200tdi, 1963 109 2 door
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Thanks Paul for the Lucas switch guidance. I have connected the wires trying to figure ir out from TerriAnn's drawing, Paul's cues and some handmade eiring diagrams from 1992 when I first did this on my 109...

I have managed to get the charging light to come on when turning the key to the ON position, get the engine to start and the alternator to charge as I can see the ammeter needle moving, but I can't get the engine to stop by turning the ignition off... I can kill the engine by removing a wire from the #1 terminal on the Lucas switch.... Not too convenient. I must have wired something wrong, but I have no clue. I have attached a diagram of the actual setup. Does anyone have any idea? It probably is something obvious...

Thanks,

Michel
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  #9  
Old July 2nd, 2016, 03:21 PM
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Michel Bertrand
1991 110SW 200tdi, 1963 109 2 door
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Fixed! I had two wired inverted (coil to switch position #1 and alt wire going to switch position 2). Duh.
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  #10  
Old July 2nd, 2016, 04:17 PM
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Paul Dunn
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Great news, Michel!
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