Discussion:
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
  • By mrdillan
  • joined 30 Oct'24 - 2 messages
  • Alabama, United States
Showing items 1 - 1 of 1 results.
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
  • By mrdillan
  • joined 30 Oct'24 - 2 messages
  • Alabama, United States

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Manitou M50-4
Braeside, Melbourne, Victoria, Australia
Hire
SMV (Konecranes) 20-1200B
Balling, Denmark
Used - Sale
Upcoming industry events …
January 28-30, 2026 - Bangkok, Thailand
March 4-5, 2026 - Detroit, Michigan, United States
March 24-26, 2026 - Stuttgart, Germany
Movers & Shakers
Jett Chitanand Jett Chitanand
President EPG Americas, Ehrhardt Partner Group (EPG)
CEO, Duravant
Manager of automated solutions engineering and implementation, MHS Lift
President and CEO, Manitou Group
Global Industry News
edition #1260 - 11 December 2025
In this week’s Forkliftaction News we report on DHL Supply Chain signing a deal to deploy autonomous mobile robots (AMRs) at its Mexican retail operations and look at Guidance Automation’s successful trial of an AMR with a hydrogen fuel cell... Continue reading

PREMIUM business

Shenzhen Wellwit Robotics Co., Ltd
The Largest AMR/AGV ODM/OEM Manufacturer in China.
Fact of the week
Foundling hatches are safe, anonymous drop-off points for unwanted infants, allowing parents in crisis a way to surrender a baby safely without fear of punishment, ensuring the child is rescued and cared for. The concept started in the 12th century, was abandoned in the late 19th century, then reintroduced in 1952. It has since been adopted in many countries.
Manitou M50-4
Braeside, Melbourne, Victoria, Australia
Hire
SMV (Konecranes) 20-1200B
Balling, Denmark
Used - Sale
Movers & Shakers
Jett Chitanand Jett Chitanand
President EPG Americas, Ehrhardt Partner Group (EPG)
CEO, Duravant
Manager of automated solutions engineering and implementation, MHS Lift
President and CEO, Manitou Group