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
3. Using digital multimeter
1840-04 Tractor Parking
All Readings Are as Specified
(WP 0540), measure resistance
Brake Pressure Switch
Proceed to Test Step 2.
between tractor park brake
Voltage Below Normal
One or More Readings Not as
pressure switch connector
Continued
Specified Replace tractor park brake
terminals as follows:
pressure switch.
a. Between connector terminal B
Proceed to Test Step 5.
and terminal A
(WP 0012, Figure 124).
Resistance should be less
than 1.5 Ohm.
b. Between connector terminal B
and terminal C
(WP 0012, Figure 124). There
should be no Continuity.
c.
Between connector terminal B
(WP 0012, Figure 124) and
ground. There should be no
Continuity.
d. Between connector terminal A
and terminal C
(WP 0012, Figure 124). There
should be no Continuity.
Test Step 2. Test for Shorted
Transmission Wiring Harness.
1. Disconnect connector A-C1
(WP 0012, Figure 106) from
connector J-C3
(WP 0012, Figure 101).
2. Using digital multimeter
Continuity Replace transmission
(WP 0540), test for continuity
wiring harness (WP 0266).
between connector A-C1
Proceed to Test Step 5.
terminal 17 (WP 0012, Figure 106)
No Continuity Proceed to step 3.
and all other terminals in
connector A-C1
(WP 0012, Figure 106).
3. Using digital multimeter
Continuity Replace transmission
(WP 0540), test for continuity
wiring harness (WP 0266).
between connector A-C1
Proceed to Test Step 5.
terminal 17 (WP 0012, Figure 106)
No Continuity Proceed to Test
and ground.
Step 3.
0091-8