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2003 Honda Civic Alternator (Single Wire) in a 1938 Hot Rod. Will it work ?

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Old Mar 15, 2021 | 09:55 AM
  #1  
waid302's Avatar
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Default 2003 Honda Civic Alternator (Single Wire) in a 1938 Hot Rod. Will it work ?

I hope someone on this forum can help me. I am building a 1938 Ford Hot Rod Pickup and the 2003 Honda Civic Alternator is a perfect fit on my 5.0 V8.

The voltage regulator utilizes five terminals: Ignition (IG), Control (C), Field Reference (FR), Battery, (B) and Lamp (L). The B terminal is the high current circuit that's responsible for charging the battery. The other circuits are located in a single connector and are responsible for controlling the voltage regulator located within the alternator.


Turning the ignition switch to the Run position will send source voltage to the IG terminal, which is required to energize the voltage regulator.

Since I don't have a PCM, will the alternator function if I leave out all of the wires except IG ?

Will it go in full output mode if the C, FR and L terminals are left out ?

Will it charge the battery properly and not hurt the battery or shorten the alternator life ?

Thank you


2003 Honda Civic Alternator
https://www.rockauto.com/en/moreinfo...415663&jsn=371

Ford 3G and 4G Alternator wiring:
https://www.fuelinjectedford.com/pub...ALT_wiring.gif
https://www.fuelinjectedford.com/pub...ALT_wiring.gif







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Old Mar 16, 2021 | 07:11 AM
  #2  
1992Si's Avatar
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Default Re: 2003 Honda Civic Alternator (Single Wire) in a 1938 Hot Rod. Will it work ?

Interesting.

I wonder if you have asked this question over on this Forum, https://www.ford-trucks.com/forums/forum62/

I have a 86 F150 and have been spending time there learning. There are some smart guys over there that may be able to help. I'm sure one of them has a good Electrical background.
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Old Mar 16, 2021 | 04:44 PM
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waid302's Avatar
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Default Re: 2003 Honda Civic Alternator (Single Wire) in a 1938 Hot Rod. Will it work ?

Originally Posted by 1992Si
Interesting.

I wonder if you have asked this question over on this Forum, https://www.ford-trucks.com/forums/forum62/

I have a 86 F150 and have been spending time there learning. There are some smart guys over there that may be able to help. I'm sure one of them has a good Electrical background.
The problem I have is that I am using Explorer 5.0 and it's serpentine drive. Explorer had the narrowest water pump and very narrow alternator (4G) but this system would look complexly out of place in a hot rod. After playing around with different alternators, I landed on a Honda Civic Alternator!

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