RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
The Troubleshooting Index is the master reference table for locating troubleshooting information. This Index contains a list of
various malfunctions which may occur during operation or inspection of the M88A1 and provides a reference to information
located within the appropriate Troubleshooting Work Package. Each Troubleshooting Work Package provides step-by-step
instructions for isolating and correcting malfunctions.
When a malfunction is recognized on the engine, transmission or hydraulic systems of the M88A1 the Troubleshooting Index
may reference STE/ICE-R method for analyzing the malfunction. The STE/ICE-R method will be the primary troubleshooting
procedure when referenced; the backup procedure should be used only when STE/ICE-R is unavailable.
Work Packages dealing with electrical troubleshooting include schematic diagrams to give insight to the harnesses involved.
See Hull Wiring Diagram (see fold-out illustration at back of this manual) for complete wiring of the entire vehicle.
Ensure MASTER switch is OFF between every step unless otherwise directed throughout troubleshoot-
ing of the electrical system or electrical components. Remove all jewelry and metal objects when
working on electrical systems to prevent injury due to electrical shock.
Certain precautions must be observed before beginning any tests on the 24-V system. Do not permit
a hot wire to touch metal parts of the vehicle at any time. Flash testing by striking a hot wire against
a vehicle ground will cause an arc that will completely destroy the connector on the lead. Accidental
contact of metal tools between battery or starter cables and frame of vehicle causes a direct circuit
resulting in arcing of tools. This can cause serious damage to tools, vehicle components, and batteries.
Overloaded batteries may explode, spraying hot acid and sharp fragments over surrounding area. The
correct procedure when removing electrical equipment, harnesses, battery cables, or starting cables is to
turn off the MASTER switch and disconnect battery ground cable. Protect ground cable from accidental
contact with battery terminal. When work has been completed, connect battery ground cable last.
The multimeter is used throughout electrical troubleshooting. STE/ICE-R can also perform as a multimeter and instruction on
its use is in TM 9-4910-57-12&P
While performing electrical troubleshooting, the black lead of multimeter must have metal to metal
contact with ground point to receive accurate reading.