Test fuse and replace if necessary.
80 amp fuse is blown.
Check the power cables to the traction amplifiers
and perform Diagnotic Output Tests 17 and 18.
No field currrent at both traction amplifiers.
Check the condition of the cables to the main power
contactor and repair as necessary.
No battery voltage is supplied to the main power
contactor tips.
Check for foreign material between the contactor
tips. Replace the contactor tips if necessary.
Contactor tips are not passing battery voltage
when the coil is activated.
Solution
Possible Cause
No field current at both traction amplifiers when the
coil driver for the main power contactor is
energized.
TOTAL shutdown.
Criteria
Resulting Effect
MAIN POWER CONTACTOR OPEN
Fault condition
E27F
E27F
Replace system controller field fix.
Malfunction of the coil driver.
Replace coil.
Solenoid coil is open or shorted internally.
Check 15 amp fuse on main harness, wiring on all
hydraulic valve coils, repair or replace. Check for
B+ at J4 Pin 3.
If error codes 29-42 occur at the same time; 15
Amp fuse in main harness is bad.
Check and repair damaged wires to the coil.
Broken or shorted wiring to the coil.
PERFORM OUTPUT TEST 14 - LIFT/LOWER PROPORTIONAL SOLENOID.
Solution
Possible Cause
The lift/lower proportional valve solenoid coil circuit
is overheated, shorted to supply, shorted to ground,
or disconnected.
LIFT system shutdown.
Criteria
Resulting Effect
LIFT/LOWER PROPORTIONAL VALVE WIRING FAULT
Fault condition
E29
E29
E
lectric
C
ounterbalance
H
igh
O
utput
Troubleshooting
REV 12/5/99
TS.6
