TM 5-3805-293-23-2
0022
Table 1. Cab Heating, Air Conditioning, and 12 Volt Power Inverter Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. No Power From 12 Volt
13.
Using digital multimeter, test for
Resistance 5.0 Ohms or Less -
Power Inverter Or +12
continuity between harness con-
Replace 12 volt power inverter (WP
Volt Auxiliary Port - Con-
nector R-C23 (WP 0009, Figure
0265)
tinued
277) terminal 5 and harness con-
Connect harness connector R-C2
nector R-C2 (WP 0009, Figure
(WP 0009, Figure 32) from harness
32) terminal 13.
connector A-C1 (WP 0009, Figure 31)
Resistance should be less than
(WP 0265).
5.0 ohms.
Connect cab upper wiring harness
connector A-C8 (WP 0009, Figure
276) to +12 volt auxiliary port (WP
0009, Figure 275) (WP 0275).
Proceed to step 14.
Resistance More Than 5.0 Ohms -
Replace cab upper wiring harness to
+12 volt auxiliary port (WP 0265).
Proceed step 14.
14. Turn battery disconnect switch to
the ON position (TM 5-3805-293-
10).
15. Using digital multimeter, test for
Voltage 10 to 14 Volts - Trouble-
voltage between center contact of
shooting complete.
auxiliary port (WP 0009, Figure
Voltage Less Than 10 Volts - Repeat
403) and machine ground.
troubleshooting from the beginning.
Voltage should be 10 to 14 volts.
END OF WORK PACKAGE
0022-52
