ELECTRICAL TROUBLESHOOTING--GENERAL INFORMATION

TM 5-2410-233-23

TROUBLESHOOTING INTRODUCTION - CONTINUED

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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.

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.

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

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.

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

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