RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURE
Tools and Special Tools
Electrical system malfunctioning.
Battery-generator indicator reads in yellow or lower red region with main engine running and main generator in
system (generator cutout switch closed). Do steps 1 and 2.
Battery-generator indicator reads in yellow or lower red region with APU engine running and APU generator
switch on (main engine not running). Do steps 3 thru 5.
Battery-generator indicator reads in bottom of lower red region (no deflection) with master switch on. Do step 6.
All circuits dead except personnel heater, master relay lamp, and slave receptacle. Do step 7.
Infrared system (driver's periscope) fails to operate. Do step 8.
Check for defective switching relay box.
Repair or replace switching relay box.
Check for defective main generator armature relay.
Repair or replace main generator armature relay.
Check for defective APU generator switch.
Replace switch, if defective.
Check for defective hydraulic pressure switch.
Check for defective master relay.
Repair or replace master relay.
Check main power bus.
Repair or replace defective components.