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TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
58. INTERMEDIATE SPEED INDICATOR LIGHT WILL NOT LIGHT.
NOTE
Refer to wiring diagram for all wiring repair steps.
Step 1. Pull instrument cluster panel light (1) out of dashboard (2).
Step 2. Remove intermediate speed indicator lamp (3) and check for continuity.
If there is no continuity, replace lamp.
If there is continuity, go to step 3.
NOTE
Vehicle MASTER disconnect switch must be ON, ignition switch set to ON, and master
light switch set to PANEL BRT, Failure to do so will cause erroneous results.
Step 3. Check for +24 VDC between wire 372 (4) and ground at instrument cluster
panel light (1).
If +24 VDC is not present, repair wiring 372 between
instrument cluster panel light and fuse box 1.
If +24 VDC is present, go to step 4.
Step 4. Set master light switch to OFF and connect jumper across intermediate
speed shift and indicator switch terminals (5). Set master light switch to
PANEL BRT and check if intermediate speed indicator light is lit.
If intermediate speed indicator light is lit, replace intermediate
speed shift and indicator switch (page 4-209).
If intermediate speed indicator light is not lit, repair wiring 222
between instrument cluster panel light and intermediate speed
shift and indicator switch.

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