page 5-112
TM 5-3805-262-20
3-12. SENDING UNITS TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE OIL PRESSURE SWITCH DOES NOT OPERATE.
Step 1.
Step 2.
R e m o v e e n g i n e l e f t r e a r s i d e p a n e l
(page 9-14).
Start engine and watch multimeter.
Multimeter should indicate no continuity (open circuit) .
a .
If multimeter indicates continuity, refer to page 3-36, MALFUNC-
TION 9. If engine oil pressure is okay, replace engine oil
pressure switch (page 5-112).
b .
2. FUEL LEVEL SENDING UNIT
If multimeter does not indicate continuity, refer to page 3-71,
MALFUNCTION 2.
Step 1.
Remove and
a . I f f u el
DOES NOT OPERATE.
test fuel level sending unit (page 5-117).
level sending unit tests okay, reinstall sending unit
(page 5-119) and go to step 2 below.
b . I f f u e l l e v e l s e n d i n g u n i t d o e s n o t t e s t o k a y , r e p l a c e s e n d i n g
unit (page 5-117) .
Step 2.
Check ground wire connection between fuel level sending unit and
c o v e r p l a t e.
a. If wiring connection is bad,
replace ground wire (page 5-117).
b. If ground wire connection is okay, refer to page 3-78, MALFUNC-
TION 8.
3-93
