TM 5-2420-231-23-1
0043
Table 1. Display and/or Backup Alarm Does Not Turn On - Continued.
043
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Using a digital multimeter, mea-
Display and/or Backup
Resistance 5.0 Ohms or Less -
sure resistance between power-
Replace powershift wiring harness (WP
Alarm Does Not Turn On -
shift controller wiring harness
0167).
Continued
connector (WP 0007, Figure 20)
Proceed to Test Step 30.
terminal B1 and machine ground.
Resistance Greater Than 5.0 Ohms -
Resistance should be 5.0 ohms or
Proceed to Test Step 27.
less.
Test Step 27. Test for Open Ground
to 4WD Jumper Harness.
1. Remove front floor cover plate
(WP 0306).
2. Disconnect powershift wiring har-
ness connector (WP 0007, Figure
123) from 4WD jumper harness
connector (WP 0007, Figure 122).
3. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between 4WD
Replace powershift wiring harness (WP
jumper harness connector (WP
0167).
0007, Figure 122) terminal B and
Proceed to Test Step 30.
machine ground. Resistance
Resistance Greater Than 5.0 Ohms -
should be 5.0 ohms or less.
Proceed to Test Step 28.
Test Step 28. Test for Open Ground
to Main Chassis Wiring Harness.
1. Disconnect 4WD jumper harness
connector (WP 0007, Figure 121)
from main chassis wiring harness
connector (WP 0007, Figure 120).
2. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between main
Replace 4WD jumper harness (WP
chassis wiring harness connector
0156).
(WP 0007, Figure 120) terminal 2
Proceed to Test Step 30.
and machine ground. Resistance
Resistance Greater Than 5.0 Ohms -
should be 5.0 ohms or less.
Proceed to Test Step 29.
Test Step 29. Inspect Ground to Main
Chassis Wiring Harness Connection.
1. Inspect main chassis wiring har-
Main Chassis Wiring Harness
ness connection to ground (WP
Ground Connection Tight and Free
0007, Figure 119) for tightness and
of Corrosion - Replace main chassis
corrosion.
wiring harness (WP 0154).
Proceed to Test Step 30.
Main Chassis Wiring Harness
Ground Connection Loose and/or
Corroded - Clean and/or tighten main
chassis wiring harness ground
connection (WP 0007, Figure 119) (WP
0370).
Proceed to step 2.
0043-15
