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Page Title:
LOW ENGINE OIL PRESSURE INDICATOR LIGHT DOES NOT WORK |
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 TM 5-2420-222-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
19. LOW ENGINE OIL PRESSURE INDICATOR LIGHT DOES NOT WORK
WARNING
Although ignition lock switch must be on and battery ground cable connected to test electrical circuit
voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests or
replacing parts. This will keep you from getting shocked and prevent damage to parts and equipment.
Step 1.
Pull connector (1) off of terminal (2). Using multimeter set to RX1 scale, place red probe on terminal
(3) and black probe on cowl support (4). Check for 0 ohm on multimeter.
a.
If multimeter reads 0 ohm, go to step 2.
b.
If multimeter reads more than 0 ohm, go to step 4.
Step 2.
Remove indicator light (page 2550). Using multimeter set to RX1 scale, place red probe on bulb
positive terminal (5) and black probe on bulb base (6). Check for 0 ohm on multimeter.
a.
If multimeter reads 0 ohm, go to step 3.
b.
If multimeter reads more than 0 ohm, replace bulb and install indicator light (page 2-550).
Step 3.
Check light lead (7) for cracks, breaks, and corrosion.
a.
If light lead (7) is cracked or broken, replace it. Install indicator light (page 2-550).
b.
If light lead (7) is corroded, clean using fine abrasive paper (item 20, Appendix C). Install
indicator light (page 2-550).
c.
If light lead (7) is not cracked, broken, or corroded, repair pink wire in cowl wiring harness
(page 2-137). Install indicator light (page 2-550).
Step 4.
Pull connector (8) off of terminal (9). Using multimeter set to RX1 scale, place red probe on terminal
(9) and black probe on flywheel housing (10). Check for 0 ohm on multimeter.
2-84
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