TM 5-2420-231-23-3
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RELAY INSPECTION AND TESTING
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1. Inspecting Relays
a. Check for bent or damaged pins.
b. Check for burned or damaged relay case.
2. Testing Relays
NOTE
When testing relays, always refer to the circuit diagram printed or stamped on relay case.
A 9V battery also may be used to actuate a 12V relay.
Using a multimeter, check for continuity across relay coil.
Mini Relay
Check for continuity between terminals 85 and 86.
Micro Relay
(1) Check for continuity between terminals 1 and 2.
(2) Using a multimeter, check open or closed contacts within relay.
Mini Relay
(1) With relay actuated, check for continuity between terminals 87 and 30.
(2) With relay not actuated, check for continuity between terminals 87a and 30.
Micro Relay
(1) With relay actuated, check for continuity between terminals 5 and 3.
(2) With relay not actuated, check for continuity between terminals 4 and 3.
Figure 20. Relay Schematics.
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END OF TASK
FOLLOW-ON TASKS
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Connect batteries (WP 0157).
END OF TASK
END OF WORK PACKAGE
