One-wire alternators sense the voltage right at the point where it is being generated—at the alternator. The farther the voltage runs through wiring, the more voltage drop you can have.

Some Fords have a wire with the proper connector to mate with this, but ours did not, so we had to connect it to the white wire with the black stripe in the old alternator harness. See All 8 Photos ...

The solution is a 100-130-amp single-wire Motorcraft 3G alternator. You can buy a new 100-plus amp Ford 3G alternator from Summit Racing Equipment and be back on the road in a matter of hours.

The indicator light wire from the stock wiring harness has to be connected to this terminal of the one-wire alternator. If you had an OE externally regulated alternator, then use a conversion ...