back to the basics.
1 key up truck and check the voltage at the distribution board CA 205-3 (should be 0 volts)
2 check voltage at both the master and slave controller. CA 401-3 and CA403-3 if you have over 18 volts then the calibrate the ACC and brake pot you need a handset and manual to do this. It's the regular handset used on all EV 100 systems.
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