Ford 1700 - Voltage Regulator replacement

   / Ford 1700 - Voltage Regulator replacement #31  
Swapping in an alternator with an internal regular fixed it!

Here's external vs. internal:

IMG_1708.JPG


They are virtually identical. Even the little booklets are clearly from the same place:


IMG_1717.JPG


There is no need to change the wiring on that little T-connector on the alternator.

The N terminal (labeled S for Sensor on the new alternator), goes to 12V from the ignition.

The F terminal (labeled L for Lamp on the new alternator), goes to the Charge Light.

To accomplish both of the above, all you have to do is to cut the connector off the old regulator and then jumper a couple of the pins together like this:

IMG_1711.JPG


N is jumped to IG to provide 12V to the Sensor input on the new alternator.

F is jumped to L which allows the Lamp signal from the new alternator to control the charge lamp in the dashboard.

Works like a champ now. When the ignition on and engine not running both the low pressure and charge lights are on. Once engine is running, the charge light goes out and I get around 14.6 volts across the battery terminals.

Just waiting on my new T-connector pigtail to come in, and I'll swap out the original one and complete the wire loom.

IMG_1719.JPG


Hope some will find this useful in the future. Oh and the alternator came with unlimited lifetime warranty.
 
   / Ford 1700 - Voltage Regulator replacement #32  
Thanks for posting your fix so that other will benefit in the future and great pictures!
 
   / Ford 1700 - Voltage Regulator replacement #33  
Hope some will find this useful in the future.

pclausen, you didn't have to wait too long; I found it very useful. This was my exact problem on a Ford 1700 I'm bringing back to life. Thanks for sharing everything! Links were all very helpful, as well as your guide to the pigtail for the voltage regulator. I thought I'd be done with the swap tonight but I bent the old top mount bolt pulling the old alternator off - next time I'm at the shop I'll be able to check everything.

To offer even more help to the next guy, I found the alternator pclausen ID'd on rockauto by looking up a Nissan 620. No warranty on their website, but you can get the alternator for $35-$45. I tried the PureEnergy offering.

RockAuto 14231 Alternator for 1978 Nissan 620 Pickup

Seems like a $45 alternator upgrade is the ideal fix for a bad $65 external voltage regulator.

-- Aaron
 
   / Ford 1700 - Voltage Regulator replacement #34  
pclusen,

Thanks for posting the information. It is great for future reference. I have never had that issue to even research but you never now.

JC,
 

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