Wiggle connector half and pull apart; do not pull on
3. Install test harness in series with wiring harness and
arm regenerative valve (B).
4. Turn key switch to ON but do not start engine.
Indicator light must come ON, go OUT, and then ON
indicating there is continuity in the wiring harness and
there is a signal from engine and pump controller.
5. Start engine.
6. Actuate boom up and arm in functions in combined
operation. Pull both control levers to full stroke.
Indicator light must be ON and brightness must
If light goes OUT or brightness does not increase,
check wiring harnesses, solenoid coil, rear pump
pressure sensor, arm in pilot pressure sensor, and
boom up pressure switch. (See procedure in Group