TM 5-3895-370-14&P
Table 4-4. Unit Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
ELECTRICAL SYSTEM (CONT)
25.
IDENTIFICATION AND/OR TAILLIGHTS DO NOT OPERATE (CONT).
Step 3. Check resistance across ID/taillight diode.
If resistance is not 0.456 - 0.481 ohms, replace diode (para 4-74).
If resistance is 0.456 - 0.481 ohms, go to step 4.
Step 4. Check resistance across ID/taillight resistor.
If resistance is not 3.3 ±0.2 ohms, replace resistor (para 4-74).
If resistance is 3.3 ±0.2 ohms, go to step 5.
Step 5. Check voltage on resistor/junction cable at terminal strip (ID/taillight terminal) in junction box.
If 12 ±3 vdc is not measured, repair or replace resistor/junction cable
(para 4-74 and 4-75).
If 12 ±3 vdc is measured, go to step 6.
Step 6. Check voltage on junction/breaker cable (brown wire) at left side of circuit breaker box.
If 12 ±3 vdc is not measured, repair or replace junction/breaker cable
(para 4-75 and 4-76).
If 12 ±3 vdc is measured, go to step 7.
Step 7. Check voltage on opposite side of ID/taillight amp breaker.
If 12 ±3 vdc is not measured, replace amp breaker (para 4-76).
If 12 ±3 vdc is measured, repair or replace chassis wire harness (para 4-88).
26.
FLOW RATE INDICATOR DOES NOT OPERATE.
Step 1. Turn on rate indicator light switch and inspect screen.
If screen does not operate, go to step 6.
If screen operates, go to step 2.
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