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TM 10-3930-669-20
1. DRIVE AXLE OVERHEATING (CONT).
KNOWN INFO
Engine temperature 105°F or
over.
Glow plug indicator operates.
Drive axle oil cooler ground
wire
OK.
Drive axle oil cooler OK.
Relay R7 ground wire OK.
Wire 29 to relay R7 OK.
Wire 73 OK.
Relay R7 OK.
Wire 29 to engine temperature
switch OK.
Engine temperature switch
OK.
Wire 71 OK.
POSSIBLE PROBLEMS
Parking brake dragging.
Brake fluid faulty.
Drive axle oil level incorrect.
Master cylinder faulty.
Drive axle faulty.
Axle oil pump ground wire
faulty.
Axle oil pump faulty.
Relay RB ground wire faulty.
Wire 29 to relay R8 faulty.
Wire 74 faulty.
Relay R8 faulty.
Wire 29 to drive axle
temperature switch faulty.
Drive axle oil temperature
switch faulty.
Wire 72 faulty.
TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
This question eliminates a possible
problem or group of possible
problems
determining
where
troubleshooting continues.
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