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Unicarriers (& Nissan) NISSAN 50:
Wiring on alternator

I am trying to help a friend of mine who has an old Nissan Forklift. The model listed on data plate is PHO2A25V.
I had the alternator tested at NAPA today and its charging. It is a 40 amp alternator.

The two wires that are cut is close to back of where a connector should plug in. One wire is a solid white wire. It has 12 volts all the time. Looks to be maybe 16 gauge wire ? I think that one should go to the sense terminal on back of alternator but not sure ?

Other one is white with red stripe. It has no power on it with or without key turned on. I believe that wire one would go to the L terminal but would need battery voltage when key is turned on ? I just need to find why no power with key on. Am I on the right track in thinking this ?
It also is grounded on the E terminal.

Thanks for any help. Mr Dillan
  • Posted 30 Oct 2024 11:32
  • Modified 1 Nov 2024 09:44 by poster
  • Discussion started by mrdillan
  • Alabama, United States
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Its fixed.
Under the dash I found a fuse missing that fed the exciter wire. Replaced with a 10 amp and wired white with red stripe to L terminal on back of alternator. That wire is now showing 11.5 volts when I turn the key on. Solid white wire has 12.6 volts all the time and I connected it to the sense terminal. Its now charging 14.5 volts. All is good.
  • Posted 1 Nov 2024 09:41
  • Reply by mrdillan
  • Alabama, United States
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