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TM 5-2410-233-23
TROUBLESHOOTING INTRODUCTION - CONTINUED
0004 00
ELECTRICAL TROUBLESHOOTING--GENERAL INFORMATION
NOTE
Refer to Electrical General Maintenance Instructions (WP 0177 00) for instructions on using a multimeter to
check for continuity or shorts and to perform voltage checks.
1.
Analyze the symptoms and conditions and use common sense and logic to determine the most likely cause for the prob-
lem, then troubleshoot that circuit first. The more information you have concerning the problem, the easier it will be to
troubleshoot.
2.
Isolate to the subsystem level (in cases where more than one subsystem is involved); next isolate the problem to a single
circuit within the subsystem; then, isolate the problem to the faulty component using the troubleshooting symptom index
3.
Frayed, broken, loose or corroded wiring is a common source of problems in any electrical circuit. Always make visual
inspection before starting detail troubleshooting. Observe in particular contacts to ground. Components with case
grounds are especially troublesome.
CAUTION
When making continuity checks, ensure the test equipment is isolated from power source.
4.
Most of checks made are voltage checks. Pay particular attention to voltages being checked in procedures. This equip-
ment is a 24 volt system. Instructions prior to the step instruct to disconnect at test point from the potential malfunction-
ing component. Once the check has been made, either repair the component or go to the referenced step. If going to
another step, reconnect connection or do as otherwise instructed, such as install jumper wires using jumper wire kit.
When ready to make the prescribed check, apply power to the circuit (if required). A helper may be required if the
switch or power source is out of reach. Release the power function prior to going on, to avoid damage to equipment.
END OF WORK PACKAGE
0004 00-2

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