JohnTB Posted June 27, 2017 Report Share Posted June 27, 2017 The wiring diagram for my 1970 CP shows three wires leaving the Alternator. A large capacity Brown/White which ends up on the Ammeter, a Brown/Yellow which goes to the Ignition warning light and Brown/Red which goes to the connector block. However..... my Alternator has only two wires leaving it. A large capacity Brown/White which does indeed end up on the Ammeter and another, smaller capacity Brown/White which goes where I know not. It does not go to the connector block as those connections are Brown. Anybody give me a steer please ? Ta! John B Quote Link to post Share on other sites
matttnz Posted June 28, 2017 Report Share Posted June 28, 2017 The 2 wire alternators tend to have an internal regulator compared with the 3 but that only seems to have been the TR5 from what I can make out from the AAG diagrams. The CP uses the extra wire for the ammeter which isn't used on the CRs If the large wire goes to the Ammeter, the smaller one must go to the idiot light. I can only think that the large wire splices into the connector block but I can't see how that enables the ammeter to function. Coming off the small wire would be "less reassuring" and must get a tad warm. "Alternatively", perhaps your car has perfected how to create energy and break the basic laws of thermodynamics. Or hiding one of those "Mr Fusion" units form Back to the Future? Quote Link to post Share on other sites
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