TM 5-3805-298-23-1
0090
Table 1. 420 Secondary Steering System Diagnostic Codes - Continued.
090
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
4. Release secondary steering test
420-7 Secondary Steering
switch.
System Is Not Responding
Properly - Continued
5. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
6. Remove secondary steering
micro-relay (TM 5-3805-298-10).
7. Remove ride control relay
(TM 5-3805-298-10).
8. Install ride control relay in place of
secondary steering micro-relay on
C-C32 (WP 0012, Figure 17).
9. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
10. Within three seconds, attempt to
The Machine Steers and Secondary
Steering Indicator Is On - Return ride
steer the machine. Observe
secondary steering indicator
control relay to its original position
(TM 5-3805-298-10).
(TM 5-3805-298-10). Replace
secondary steering relay (TM 5-3805-
298-10).
Proceed to Test Step 10.
The Machine Does Not Steer and
Secondary Steering Indicator Is Off -
Replace lower cab wiring harness
(WP 0291).
Proceed to Test Step 10.
Test Step 8. Test for Faulty
Secondary Steering Relay.
1. Using digital multimeter
Voltage 18 to 26 V - Proceed to step 2.
(WP 0174), test for voltage
Voltage Less Than 18 V - Release
between secondary steering relay
secondary steering test switch.
terminal C (WP 0012, Figure 105)
Replace secondary steering wiring
and terminal B (ground).
harness (WP 0288).
Proceed to Test Step 10.
2. Using digital multimeter
Voltage 18 to 26 V - Release
(WP 0174), test for voltage
secondary steering test switch.
between secondary steering relay
Proceed to Test Step 3.
terminal A (WP 0012, Figure 105)
Voltage Less Than 18 V - Release
and terminal B (ground).
secondary steering test switch.
Replace secondary steering magnetic
switch (WP 0287).
Proceed to Test Step 10.
0090-5
