Discussion:
Wiring Harness Problems on Clark C500

I just bought an old Clark C500-Y50 5000 pound pneumatic tire forklift. Runs and drives OK but the electrical wiring is a mess and none of the gauges work. The insulation is melted off a few of the original wires in the wiring harness and there are numerous extra wires run between devices as well as jumpers spliced into the wiring harness.

I want to refurbish the wiring harness and get everything working but I havent been able to find a wiring diagram yet for the Clark C500. I purchased a service manual on line but when I got it there are no wiring diagrams. It seems to have a lot of info on the mechanical repairs and sections for rebuilding the alternator and starter but nothing on the wiring.

If anyone has a copy of the wiring diagrams for the C500 models and could send me a copy that would be great. If anyone needs a copy of the service manual that I have let me know and I can send it.
  • Posted 25 Apr 2021 03:27
  • By Blueacre
  • joined 25 Mar'21 - 7 messages
  • Ontario, Canada
Showing items 1 - 3 of 3 results.
I could also use a wiring diagram having the exact same issue with a c500 y25. Jumpers everywhere, melted wiring it's a late 70s maybe early 80s model.
  • Posted 6 Aug 2025 02:39
  • By Randall_Smail
  • joined 6 Aug'25 - 1 message
  • Pa, United States
I have all of the wiring diagrams on a memory stick I will look it up and send it
  • Posted 8 Jul 2025 03:40
  • By John_Bradley
  • joined 10 Aug'22 - 237 messages
  • Texas, United States
Jb69
Basic Schematic for C500.
  • Posted 6 Jul 2025 01:18
  • By Keith_Stegath
  • joined 6 Jul'25 - 1 message
  • FL, 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.

Aichi RX07B
Yokohama, Japan
Used - Sale
SMV (Konecranes) 33-1200C
Balling, Denmark
Used - Sale

PREMIUM business

Tailift Material Handling USA Inc
Part of Toyota Industries Group - Leading manufacturer of High-quality machines.
Latest job alerts …
Ottumwa, IA, United States
St. Louis, MO, United States
Atlanta Savannah Orlando Tampa Jacksonville West Palm, United States
Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.