AIR CLEANER BLOWER CIRCUIT. (Cont) - TM-9-2350-238-20-10150

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe this warning

could result in injury to personnel.

Step 1.

To access electrical leads, open forward air cleaner blower access cover.

Disconnect lead 345 from forward air cleaner centrifugal fan. Place red

probe in lead 345 (terminal end). Ground black probe. Set MASTER and

INST switches ON. If multimeter indicates no voltage, repair lead 345 from

centrifugal fan to INST switch. Refer to page 2-371. If multimeter

indicates about 24 volts, go to step 2. Set MASTER and INST switches

OFF. Connect lead 345 to forward air cleaner centrifugal fan.

Step 2.

Disconnect lead GND from forward air cleaner centrifugal fan. Check

continuity between lead GND (pin end) and chassis ground. If no

continuity exists, repair lead GND. Refer to page 2-371. If continuity

exists, repair or replace forward air cleaner centrifugal fan. Refer to page

2-446. Connect lead GND to forward air cleaner centrifugal fan GND.

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