Table 3-6. Unit Troubleshooting Table. -- Continued
Test or Inspection
HORN DOES NOT WORK.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical circuits, a
direct short may result. Damage to equipment and injury or death to personnel may occur.
Check for 24 Vdc on wire 180 at horn (1) when switch (2) is pressed (refer to FO-3).
If 24 Vdc is present on wire 180, replace horn (1) (Para 19-7).
If 24 Vdc is not present, check wire 180 for continuity. Replace wire harness as necessary
Check for 12 Vdc on wire 190 at switch (2) (refer to FO-3).
If 12 Vdc is present on wire 190, replace indicator arm (3) (Para 12-26).
If 12 Vdc is not present, check wire 190 for continuity. Replace wire harness as necessary