Alternator and voltage problem

[firedog]

I have a electrical problem with my 1971 Dodge D 100 i have put two voltage regulator on two alternator on my truck change wire harness put more grounds on the truck.Just put the motor in it is a 318 La motor I try to get it on the road for the cruse in this weekend. I have 3 wires one red wire, one green wire, and the black wire but only have a place for two wires. I need help Thank you

[wally426ci]

Need more info such as:

What size are each of the wires? Where in the Heck are these wires?

Show us a picture..... or study the factory wiring diagram.....

[firedog]

The wires are stock it is the factory wires the green wire goes to the regulator the Black wire goes to the amp gauge and the red goes to ? i can not find the red on the print i will take photos today. Thank you

[Hobcobble]

The wires are stock it is the factory wires the green wire goes to the regulator the Black wire goes to the amp gauge and the red goes to ? i can not find the red on the print i will take photos today. Thank you

If your wiring is of '71 vintage, you would need an alternator with two field wire
connections. The "red" wire might possibly be an orange wire? You should review
a wiring diagram:
http://www.sweptline.com/tech/71wire.jpg

Also, you should read through all the posts in this thread:
http://dodgesweptline.org/phorum/read.p ... 4#msg-2734

Let us know if some of this helps you....
John

[firedog]

I look at the wiring diagram no red or orange wire at the alternator? am i missing something ?

[wally426ci]

Orange is temp sensor which runs along same area.

Inside the cab you may have a black and red which hook to AMP gauge.

[Hobcobble]

I look at the wiring diagram no red or orange wire at the alternator? am i missing something ?

Read the ENTIRE THREAD at the link I've provided..... One of the posts makes reference
to an "amendment" to the '70/'71 Factory Service Manual which identifies another color
wire used for one of the field terminals. I'm not saying this is DEFINITELY your issue, but
it is worth seeing through.
John

[firedog]

Thank you for all your help i put a 3 wire alternator on my truck fixed Thank you again

[Hobcobble]

Sounds like its cruising time now....
John

[firedog]

Yes it is

[PwrWgnWalt]

Hi Firedog;
Sorry I didn't see your post sooner... See the "Third Topic" in my extensive post on electrical items here:
viewtopic.php?f=21&t=34977

The diagram shows how the wiring works with either style of alternator and voltage regulator. It shows your bigger black ALT wire, and the green and red sense wires.

- Walt

[Jake66]

Hi Firedog;
Sorry I didn't see your post sooner... See the "Third Topic" in my extensive post on electrical items here:
viewtopic.php?f=21&t=34977

The diagram shows how the wiring works with either style of alternator and voltage regulator. It shows your bigger black ALT wire, and the green and red sense wires.

- Walt

thanks Walt, my alternator, battery, starter relay, voltage regulator, and old voltage reg are all new. your wiring diagram is what i have been looking for. the previous owner did a hack job on the wiring.

[dodgeboykim]

Its good to see you sorted it out and kept the stock style alternator. So many seem to just give up and jam on a G M style alternator cause its so much easier to do than just fix the problem.

[Jake66]

Its good to see you sorted it out and kept the stock style alternator. So many seem to just give up and jam on a G M style alternator cause its so much easier to do than just fix the problem.

i enjoy originality, keeps the character of the truck intact. original is beautiful. except when you have a seized 413 max wedge in your truck :/then you gotta do what you gotta do.

[Jake66]

Hi Firedog;
Sorry I didn't see your post sooner... See the "Third Topic" in my extensive post on electrical items here:
viewtopic.php?f=21&t=34977

The diagram shows how the wiring works with either style of alternator and voltage regulator. It shows your bigger black ALT wire, and the green and red sense wires.

- Walt

I used your wiring diagram and hooked everything up the same way in my truck, and now my battery is charging from the alternator and I dont have to leave it on a trickle charger every night. Thanks a bunch!!

[PwrWgnWalt]

Glad it helped, Jake!