I agree with joe d. Just a couple more things for you. Check for shorts to frame and correct if found. The cable for the display manager sometimes breaks where it is tie wrapped to the r/s arm outter shielding may look good but ohm it out with handle up/down. Also you may just need to run a configuration download. (Key off. Depress both deadman and lift select button, key on and push lift select 3 or 4 times) when download is done code 57 will be displayed. Rekey and download is finished.
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