TM 5-2420-231-23-1
0011
Table 1. Hard Start in Cold Temperatures (50F or Below) - Continued.
011
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less - Verify
Hard Start in Cold
sure resistance between grid
that right-front chassis ground (Figure
Temperatures (50F or
heater wiring harness connector
13, Item 1) is clean and tight. If ground
Below) - Continued
(WP 0007, Figure 15) terminal 5
is OK, replace main chassis wiring
and heater grid controller wiring
harness (WP 0154).
harness connector (WP 0007, Fig-
Proceed to Test Step 9.
ure 11) terminal 10. Resistance
Resistance Greater Than 5.0 Ohms -
should be 5.0 ohms or less.
Grid heater wiring harness is open.
Replace grid heater wiring harness (WP
0161).
Proceed to Test Step 9.
Figure 13. Right-Front Chassis Ground.
0011
9. Using a digital multimeter, mea-
Voltage 4.5 to 5.5 Volts - Proceed to
sure voltage between main chas-
step 10.
sis wiring harness connector (WP
Voltage Less Than 4.5 Volts - Ground
0007, Figure 9) terminals B and C.
circuit is open. Replace main chassis
Voltage should be 4.5 to 5.5 volts.
wiring harness (WP 0154).
