Early Falcon Car Club

of Western Australia

Alternate Generator

Some early Falcon owners may have a need to make the change over from a Generator to Alternator or even replace a burnt-out stand-alone voltage regulator with one combined within the alternator.

Engine up-sizing is the most likely need for such an alteration. With V8 conversions, space in the engine bay is at a premium and most V8 motors are equipped with alternators which contain the regulator.

Also the better performance given from an alternator can justify the change, providing originality is of no concern. Only minor alterations to the generator type of wiring loom are required to achieve a factory look.

Fig 1. Existing layout of generator type wiring loom.

 

Firstly wipe the wiring loom with de-greaser This will clean off any oil and dirt but more importantly soften the plastic tape, as the next job is to remove it. Carefully, starting at the Firewall grommet, unwind the tape to the old regulator connectors. It should all come off in one length. Also remove the tape form the section between the main loom and the generator.

With the wires now exposed, remove the thin black and white-stripe wire that runs from the regulator to the generator Fig. 1 a.

Then cut the thin black wire with yellow-stripe from the thick yellow wire at a point just behind the big spade connector Fig. 1 b.

Now fold that thick yellow wire back to exit the loom at a point where it will reach the new alternator. Approximately the same exit point as the old gennie.

Do the same with the thick black wire, fold it back to reach the new alternator.

Cut the thin yellow & black-stripe wire from thick yellow & black-stripe wire at the spade connector. Fig. 1 c. Discard the thick yellow & black wire along with the connectors at each end. Fold the thin yellow & black wire back to exit the loom, at the same point as the others, to reach the new alternator.

The thin black & yellow-stripe wire needs to run up the loom from the horn relay, its original exit point, to be joined to the thick yellow wire at the bend where it exits towards the new alternator. Fig. 2 a. As it won't be long enough extend with the thin black & white wire previously removed from the loom.

Fig 2. Modifided layout of Generator wiring loom for use with an Alternator.

Trim the ends of the 3 wires that run to the new alternator making sure they reach. Crimp or solder eyelet lugs, that are big enough to fit over the B+ terminal on the alternator, to each thick wire. Both thick wires go to the same point. Crimp or solder a female spade connector to the thin yellow & black wire which will slide onto the field coil terminal of the alternator.

Re-wrap the loom with the salvaged tape starting with the new run from the alternator to main loom. Then continue with the tape that is still attached near the horn relay exit up to the firewall and into the grommet.

© BigH 1997

 

DISCLAIMER While this method has been tried and works, NO responsibility will be excepted by the Author, the Club or any of its Members.

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