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TM 9-2350-238-20-1
2-11. TROUBLESHOOTING INFORMATION (CONT).
Table 2-3. UNIT TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
26. SPEEDOMETER OR TACHOMETER NEEDLE DOES NOT MOVE, IS NOT STEADY, OR
DOES NOT READ CORRECTLY (CONT).
Step 4.
On engine side of driver's compartment bulkhead, disconnect speedometer
shaft assembly or tachometer shaft assembly at adapter. Check shaft core
rotation with engine running.
If core is rotating, go to step 5.
a.
If core is not rotating, replace tachometer shaft assembly or
b.
speedometer shaft assembly between adapter and engine or
transmission. Refer to page 2-1149. Connect speedometer shaft
assembly or tachometer shaft assembly to adapter.
Step 5.
On driver's side of driver's compartment bulkhead, disconnect speedometer
shaft assembly or tachometer shaft assembly from adapter. Check rotation in
adapter with engine running.
If rotation exists in adapter, replace speedometer shaft assembly or
a.
tachometer shaft assembly between adapter and speedometer or
tachometer. Refer to page 2-1149.
b. If no rotation exists in adapter, replace adapter. Refer to page
2-1149. Connect speedometer shaft assembly or tachometer shaft
assembly at adapter.
ELECTRICAL--WARNING LIGHTS AND HORN
27. MASTER IND WARNING LIGHT IS OFF AND ELECTRICAL CIRCUITS ARE OPERATING.
Step 1.
Check ground lead at left headlight disconnect for bad connection.
Tighten loose connection.
Step 2.
Troubleshoot master indicator warning light circuit. Refer to Electrical Circuit
Symptom Index, page 2-92.
2-66

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