hello working on same model truck..serial # C801...unit powers on..shows ****, battery voltage, Ver 1.7, hours, then Slack Chn message on display. horn works. lift works. no travel and cannot lower. fwd/rev contactors do not close. connected 1311 handset to curtis 1243 traction controller and it works. i can see all the menus and settings etc on the Handset screen...accel POT ok...fwd input OK...rev input OK. i then connected 1311 handset to 1310-5201 master controller and shows "no communication error". this master controller was just repaired by FSIP.
thanks,
jay
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