TM 5-3805-292-23
0006
ELECTRICAL TROUBLESHOOTING - FUEL GAUGE INOPERATIVE/INACCURATE
0006
Disconnect instrument panel (IP) (WP
Disconnect fuel sender (WP 0150).
Check for continuity between IP
connector C23-1, circuit 234B (Y),
Continuity
Perform Open Harness Test for
NO
harness side and fuel sender
present?
circuit 234 (WP 0173).
connector, circuit 234A (Y), harness
Console and Frame 19.
Miscellaneous Circuits).
YES
Check continuity between fuel
sender connector, circuit 178FK
Continuity
Repair circuit 178FK (B) or replace chassis
(B), harness side and ground
NO
present?
wiring harness in question (WP 0146).
Miscellaneous Circuits).
WARNING
YES
DO NOT smoke or permit any open flame in area of SSL while you are servicing
o
fuel system. Be sure hose nozzle is grounded against filler tube during refueling to
prevent static electricity.
DO NOT perform fuel system checks, inspections, or maintenance while smoking or
o
near fire, flames, or sparks. Wear fuel-resistant gloves and eye protection when
handling fuels. If exposed to fuel, promptly wash exposed skin and change fuel-
soaked clothing.
ALWAYS shut down engine before refueling.
o
Failure to follow these warnings may result in injury or death to personnel or
o
damage to equipment.
Remove fuel sender (WP 0150).
Measure resistance between fuel
sender connectors, sender side.
Resistance should increase smoothly
Resistance
as float arm is moved through the full
Replace fuel sender (WP 0150).
NO
okay?
range one way and decrease smoothly
as float arm is moved the opposite
Miscellaneous Circuits).
YES
Install fuel sender (WP 0150).
Replace instrument panel (IP) (WP 0155).