Wiring an alternator on vintage vehicle

[ckupq]

In my research on the "one wire" setup, I found two possible cons. One was if it sat on the shelf too long, it may need to be re-excited before being shipped. If it was not, the end user might end up with a "bad" alternator per se. The second is a known issue but not really a con in my estimation, the alternator has to hit a certain speed before excitation starts. In my Jeep (early SBC), it starts charging at 1100 rpm. In a three wire system charging starts when needed. No big deal for me, I start up and tap the throttle once to initiate the charging.

WSS

Depending on the one-wire setup, it just means you need to wire the main post and at normal operating speed it will self-excite. Searching GM one wire also brings up a pig tail that can be plugged into the back to manually excite the one-wire alternator. The diagram I posted above will still self excite without the switched live and dummy light, but comes on at idle with the switched live.

FWIW Most of the later jeep alternators are "Nip-Denso's style" like the one I posted from amazon. If this one doesn't work out for what I'm using, I'll probably step up to a 130 amp XJ alternator later and swap the pulley.

 

[ckupq]

https://www.amazon.com/DB-Electrica...sr=8-1&keywords=db+electrical+mini+alternator

Plus this
https://www.amazon.com/gp/product/B01BJXP85S/ref=ox_sc_sfl_title_5?ie=UTF8&psc=1&smid=A1LK2U4Z4PVUFU

One wire on the pigtail is an idiot light, if its on, its not charging.
The other is a 12vdc switched battery line. If this is if you're worried about self exciting not happening.

So this pint size little guy is what you get. Might wanna get a bigger one. This one will be fine for the Allis Chalmers b I'm putting it on.