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Okay, this truck has been causing issues for over 4 mechanics now, and has been passed my way. It has been burning out RH drive motor encoders. They might last anywhere from 2 weeks to 2 months. It's currently on it's 7th motor. When testing the encoder outputs, the voltage is around 5.5v on each channel, but when it fails, the voltage drops down to 2-3v and the truck freaks out. However the "input" voltage to the encoder remains a constant 11.2v.

So far, besides motors, the truck also has had a "known good" access3 module installed, and an entirely new wiring harness per NewBremen tech support. Now they want me to install another access3 claiming a bad wiring harness could have damaged the access3 causing the issues. However the LH drive motor has never had an issue, and they both recieve the same "input" voltage but give off different outputs.

Today I installed yet another brand new drive motor assembly, and the output voltage is only putting out 4.6 volts, and should be 5.5v. The LH (good side) motor does put out 5.5v exactly.

So both left and right sides are receiving 11.2v signal but the RH is only giving 4.6 back to the access3 module. Has anyone else in the world had a similar issue. Or anything else that I should check. Tomorrow I plan on switching the input leads between the 2 motors and see if the problems follows, or stays with the same motor.

Any input would be helpful.
  • Posted 14 Feb 2013 09:11
  • By griffman_23
  • joined 5 Aug'09 - 28 messages
  • Michigan, United States
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