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 3. Test for Shorted Chassis
1840-04 Tractor Parking
Wiring Harness.
Brake Pressure Switch
1. Disconnect connector J-C8
Voltage Below 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 5.
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 5.
terminal 13 (WP 0012, Figure 100)
No Continuity Proceed to step 4.
and all other terminals in
connector J-C8
(WP 0012, Figure 100).
4. Using digital multimeter
Continuity Replace chassis wiring
(WP 0540), test for continuity
harness (WP 0305).
between connector J-C8
Proceed to Test Step 5.
terminal 13 (WP 0012, Figure 100)
No Continuity Proceed to Test
and ground.
Step 4.
Test Step 4. 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 5.
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 5.
terminal 45 (WP 0012, Figure 88)
No Continuity Proceed to step 5.
and all other terminals in
connector W-C12
(WP 0012, Figure 88).
0091-9
