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. Crank engine (TM 5-2420-231-10).
Hard Start in Cold
Temperatures (50F or
9. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Proceed to
Below) - Continued
sure voltage between heater grid
step 10.
relay wiring harness connector
Voltage Less Than 10 Volts - Proceed
(WP 0007, Figure 13) terminal 85
to step 15.
and machine ground. Voltage
should be 10 to 14 volts.
10. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
11. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between heater
Proceed to step 12.
grid controller wiring harness con-
Resistance Greater Than 5.0 Ohms -
nector (WP 0007, Figure 11) termi-
Proceed to step 13.
nal 8 and machine ground.
Resistance should be 5.0 ohms or
less.
12. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between cold start
Proceed to Test Step 8.
relay wiring harness connector
Resistance Greater Than 5.0 Ohms -
(WP 0007, Figure 17) terminal 1
Proceed to step 13.
and machine ground. Resistance
should be 5.0 ohms or less.
13. Disconnect grid heater wiring har-
ness connector (Figure 17, Item 1)
from main chassis wiring harness
connector (Figure 17, Item 2).
14. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between engine
Replace grid heater wiring harness
wiring harness connector (WP
(WP 0161).
0007, Figure 16) terminal 4 and
Proceed to Test Step 9.
machine ground. Resistance
Resistance Greater Than 5.0 Ohms -
should be 5.0 ohms or less.
Verify that right-front chassis ground
(Figure 16, Item 1) is clean and tight. If
ground is OK, replace main chassis
wiring harness (WP 0154).
Proceed to Test Step 9.
0011-18
