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TM 10-3930-643-20
ELECTRICAL SYSTEM TROUBLESHOOTING AND MAINTENANCE. (cont)
5 - 7.
Light System Troubleshooting. (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
f .
BLACKOUT STOP LIGHT/TAILLIGHT(S) DOES NOT OPERATE. (cont)
Step 4.
Test the continuity of the blackout taillight wire assembly.
With the main harness disconnected from the intermediate
harness, connect the multimeter to Connector B and Pin T at the
main harness connector.
If the multimeter needle does not move, the circuit does not have
c o n t i n u i t y . I d e n t i f y a s a d e f e c t i v e w i r e a n d c o n t a c t D i r e ct
Support.
Step 5.
T e s t t h e l i g h t s w i t c h f o r c o n t i n u i t y . T u r n l i g h t s w i t c h to
BLACKOUT position. Disconnect instrument panel harness from
light switch, as shown. Connect the multimeter to Pin N for
the stop light and to ground.
If the multimeter needle does not move, the circuit does not have
continuity. Replace light switch, refer to paragraph 5-27.
Step 6.
Repeat step 5 at Pin E for taillight.
If the multimeter needle does not move, the circuit does not have
5-38
continuity. Replace light switch, refer to paragraph 5-27.
Step 7. Return M10A Forklift to original equipment condition.
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