Discussion:
Wiring Help/no reverse/forks will not go down

I have a few problems to throw at you pros to see if you can help me please.

1) on the right side, on the right side of the vehicle control module, what does the 2 green with red lines go? They plug into the side with their own plug but where are they supposed to go? I have found the same color wires coming from the shift lever, going into the left side of the VCM, so I'm assuming these wires are the out but where are they supposed to go?

2) what I am assuming is the transmissions speed sensor, there are no wires going to it. They are broke off at the sensor. This is on the right side of the transmission at the front.

3) there is another sensor located just below and to the left, towards the back. What is this?

4) the forklift will go forward but will not back up

5) the forks will go up but not come down

These problems happened at the same time. It was doing fine then after one of my guys pressure washed it, it stopped backing up and the forks will not go down. I figured a wire got cut or something but the only wires I have found not attached are the green with red. I have traced every wire through all of the harnesses and this is the only ones I have found broken.

Of course the guys all say it was running fine after pressure washing and they didn't do anything to it.

Codes F34 comes up every time it's started and F87 comes up when it chooses to upon start up.

I just replaced the VCM because the old one had rusted and was full of water after the wash but it didn't help anything.

So I am out of ideas. Can anyone help me out please?
  • Posted 25 Nov 2023 08:44
  • By Jody_Harrison
  • joined 25 Nov'23 - 1 message
  • Alabama, United States
Jody Harrison
Iron City Contracting LLC

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.

Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY
TCM FHD105Z
Yokohama, Japan
Used - Sale
UN Forklift FBRS15KQZ2
HANGZHOU, Zhejiang, China
New - Sale
Upcoming industry events …
November 27, 2025 - Jakarta, Indonesia
December 9-11, 2025 - Aktau, Kazakhstan
June 22-25, 2026 - Chicago, Illinois, United States
Movers & Shakers
Esie Cortez Esie Cortez
Vice president - IT & EP OEM parts, Big Joe Forklifts
Vice president of finance, Exotec
President - business area industrial equipment, Konecranes
Board chair, Equipment Leasing & Finance Association