490,487 code - Technical Troubleshooting discussion in Forkliftaction's forums

Crown RR5700S:
490,487 code

I have truck that intermittently displays these codes. Have replaced handle with pot 1 and access4 with latest software. Have checked harness in vulnerable places for chafing/pulling. Any ideas would be great.

Posted 5 Jul 2015 19:04
Discussion started by greg_f
Queensland, Australia

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Ok, Sounds like you have the proper book and followed it. You stated you replaced access 4?
Check POT1 power supply for a short to BNEG at ACCESS 4 CA412-5.
Just replacing pot one won't fix a short. both these codes are closely related. I would want to drive it with a meter attached so I could see what's happening at CA412 -5,7, and 8 with respect to battery pos and neg. Code 487 is CA412-5 shorted to bat. neg code 490 is CA412-8 shorted to Bat. Pos. Hope this helps.

Posted 7 Jul 2015 06:43
Reply by 1Crusader
California, United States

I didn't do it, nobody saw me and You can't prove a thing...

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