bit of information on the wav BDI

the BDI will display a fault code
the code is counted from right to left
right most LED is 1
next LED is 2
next LED is 4
next LED is 8
next LED is 16
next LED is 32
next LED is 64
add all illuminated LED's , this is your fault code

Battery gauge not resetting or showing lower than expected
assuming your batteries are good
measure the voltage at the left front terminal board
terminal 2 white wire
must be within 0.5 volts of battery voltage
requires 25.6v to reset BDI (from memory)
most common cause of voltage drop here are plug connectors to service panel, keyswitch and mast cables
what we are doing is disconnecting the white wire and using the white wire to drive the coil of a 24v relay and taking a wire from the ED contactor through an inline fuse through normally open relay tips back to terminal 2 giving full battery voltage to the controller

hope this helps