Alternator and voltage problem

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firedog
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Alternator and voltage problem

Post by 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

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wally426ci
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Re: Alternator and voltage problem

Post by 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
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Re: Alternator and voltage problem

Post by 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

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Hobcobble
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Re: Alternator and voltage problem

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firedog wrote: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 :study 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.... :study :Thumbsup
John

firedog
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Re: Alternator and voltage problem

Post by firedog »

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

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wally426ci
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Re: Alternator and voltage problem

Post by 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.

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Hobcobble
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Re: Alternator and voltage problem

Post by Hobcobble »

firedog wrote: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. :Thumbsup
John

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Re: Alternator and voltage problem

Post by firedog »

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

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Hobcobble
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Re: Alternator and voltage problem

Post by Hobcobble »

Sounds like its cruising time now.... :dance :clap
John

firedog
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Re: Alternator and voltage problem

Post by firedog »

Yes it is

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PwrWgnWalt
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Re: Alternator and voltage problem

Post by 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

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Jake66
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Re: Alternator and voltage problem

Post by Jake66 »

PwrWgnWalt wrote: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.
1966 Dodge D100 Custom SC SWB
Bermuda Turquoise
And
White

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dodgeboykim
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Re: Alternator and voltage problem

Post by 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 :shame alternator cause its so much easier to do than just fix :clap :dance the problem.

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Jake66
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Re: Alternator and voltage problem

Post by Jake66 »

dodgeboykim wrote: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 :shame alternator cause its so much easier to do than just fix :clap :dance 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.
1966 Dodge D100 Custom SC SWB
Bermuda Turquoise
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Jake66
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Re: Alternator and voltage problem

Post by Jake66 »

PwrWgnWalt wrote: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!!
1966 Dodge D100 Custom SC SWB
Bermuda Turquoise
And
White

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PwrWgnWalt
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Re: Alternator and voltage problem

Post by PwrWgnWalt »

Glad it helped, Jake!

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