ONE WIRE ALTERNATOR

[weezer]

Did a search but didn't find what I was looking for. Question: If I install a one-wire alternator on a 1970 D100, what needs to be done with the existing / leftover wiring from the old alternator to the regulator and beyond? Is it simply disconnected or does some of it have to be re-used / re-routed? Thanks. W

[Jeffc]

you must wire in the old style regulator to use a old style one field wire alt. The later type of regulator that came with your truck will not work with a one field wire alt.
However, if you are talking about a late true one wire alt, with no field wire, all the old
field wires no longer are used and may be just wrapped up. If you are installing a late
type one wire alt (were the voltage reg is built in) you need to upgrade your primary feed wire from the alt to the battery to at least a 8 gauge wire, the old 10 gauge wire will cook, and you need to leave the power feed wire that enters the dash from the starter relay so everything except the alt gauge will
work right (the alt gauge will show a neg discarge, depends on load on how much of a discarge, but that is normal with out it hooked to the alt).

[weezer]

...if you are talking about a late true one wire alt, with no field wire, all the old
field wires no longer are used and may be just wrapped up. If you are installing a late
type one wire alt (were the voltage reg is built in) you need to upgrade your primary feed wire from the alt to the battery to at least a 8 gauge wire, the old 10 gauge wire will cook, and you need to leave the power feed wire that enters the dash from the starter relay so everything except the alt gauge will
work right ...

And THAT is what I was looking for, friends! Many thanks to you, Jeff, and to all on this site. I am thrilled and amazed at the information I get from Sweptline. I would heve never gotten my '70 off the ground (literally!) without y'all! weezer

[BCW]

I am changing the amp gauge to voltmeter on my 70 crew . I done a search and found were a guy used a first gen Dakoda gauge . Any other one someone has used . I am trying to stay with the gauge cluster.

[CSS-Registry]

i sent my cluster to redline to have the gauge converted and all the others calibrated. it turned out nice and works pretty well while still looking like an AMP gauge. it wasn't cheap but it was comparable to buying all new Autometers.

judging from the back side of the gauge i don't see why you couldn't do it your self...

Ben

[BCW]

Thanks for the info. Sorry I did not mean to hijack this thread. I ment to start a new one . It was early in the morning must have been still asleep.