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 - 7 of 7 results.
Gunnarlueck3113 at gmail dot com
  • Posted 4 Nov 2025 11:01
  • Modified 4 Nov 2025 19:54 by administrator
  • By Gunnar_Lueck
  • joined 3 Nov'25 - 2 messages
  • Oklahoma, United States
Can you give contact info ie email so I can send info
  • Posted 4 Nov 2025 01:11
  • By John_Bradley
  • joined 10 Aug'22 - 263 messages
  • Texas, United States
Jb69
Is it possible to get email so i can send info
  • Posted 4 Nov 2025 01:09
  • By John_Bradley
  • joined 10 Aug'22 - 263 messages
  • Texas, United States
Jb69
I'm in need of a wire diagram as well for a C500-H30. The one on this thread is exactly what I need but it's to blurry to see the little numbers. Can someone send it to me. Thank you
  • Posted 3 Nov 2025 11:19
  • By Gunnar_Lueck
  • joined 3 Nov'25 - 2 messages
  • Oklahoma, United States
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 - 263 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

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