TM 5-3805-296-23-2
0091
Table 1. 1840 Tractor Parking Brake Pressure Switch Diagnostic Codes Continued.
091
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 4. Test for Shorted Chassis
1840-03 Tractor Parking
Wiring Harness.
Brake Pressure Switch
1. Disconnect connector J-C8
Voltage Above Normal
(WP 0012, Figure 100) from
Continued
connector W-C1
(WP 0012, Figure 99).
2. Using digital multimeter
Continuity Replace chassis wiring
(WP 0540), test for continuity
harness (WP 0305).
between connector J-C3
Proceed to Test Step 9.
terminal 17 (WP 0012, Figure 101)
No Continuity Proceed to step 3.
and all other terminals in
connector J-C3
(WP 0012, Figure 101).
3. Using digital multimeter
Continuity Replace chassis wiring
(WP 0540), test for continuity
harness (WP 0305).
between connector J-C8
Proceed to Test Step 9.
terminal 13 (WP 0012, Figure 100)
No Continuity Proceed to Test
and all other terminals in
Step 5.
connector J-C8
(WP 0012, Figure 100).
Test Step 5. Test for Shorted Main
Cab Wiring Harness.
1. Disconnect connector W-C12
(WP 0012, Figure 88) from
transmission/chassis ECM.
2. Disconnect connector W-C13
(WP 0012, Figure 89) from
transmission/chassis ECM.
3. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C1
Proceed to Test Step 9.
terminal 13 (WP 0012, Figure 99)
No Continuity Proceed to step 4.
and all other terminals in
connector W-C1
(WP 0012, Figure 99).
4. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C12
Proceed to Test Step 9.
terminal 45 (WP 0012, Figure 88)
No Continuity Proceed to step 5.
and all other terminals in
connector W-C12
(WP 0012, Figure 88).
5. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C12
Proceed to Test Step 9.
terminal 45 (WP 0012, Figure 88)
No Continuity Replace transmission/
and all terminals in connector
chassis ECM (WP 0495).
W-C13 (WP 0012, Figure 89).
Proceed to Test Step 9.
0091-4
