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
3. Using a digital multimeter, mea-
Hard Start in Cold
Resistance 5.0 Ohms or Less -
sure resistance between cold start
Proceed to step 4.
Temperatures (50F or
relay wiring harness connector
Below) - Continued
Resistance Greater Than 5.0 Ohms -
(WP 0007, Figure 17) terminal 2
Replace grid heater wiring harness (WP
and heater grid relay wiring har-
0161).
ness connector (WP 0007, Figure
Proceed to Test Step 9.
13) terminal 87a. Resistance
should be 5.0 ohms or less.
4. Using a digital multimeter, mea-
Resistance 30 to 40 Ohms - Proceed
sure resistance between cold start
to step 5.
relay (WP 0007, Figure 17) termi-
Resistance Less Than 30 Ohms or
nals 1 and 2. Resistance should be
Greater Than 40 Ohms - Replace cold
30 to 40 ohms.
start relay (WP 0160).
Proceed to Test Step 9.
5. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between heater
Proceed to step 6.
grid relay wiring harness connector
Resistance Greater Than 5.0 Ohms -
(WP 0007, Figure 13) terminal 86
Verify right-front chassis ground
and machine ground. Resistance
(Figure 19, Item 1) is clean and tight. If
should be 5.0 ohms or less.
ground is OK, replace main chassis
wiring harness (WP 0154).
Proceed to Test Step 9.
0011-22