AERATION DETECTOR CIRCUIT. (Cont) - TM-9-2350-238-20-10231

TM 9-2350-238-20-1

Make sure MASTER switch is OFF before repairing electrical

circuits. Failure to observe this warning could result in injury to

personnel.

Step 8.

Disconnect lead 509B from aeration detector. Place red probe on lead

509B. Ground black probe. Set MASTER switch ON. If multimeter

indicates about 24 volts, go to step 9. If multimeter indicates no voltage,

repair lead 509B. Refer to page 2-371. Set MASTER switch OFF.

Step 9.

Place red probe on aeration detector switch contact 1. Place black probe

on aeration detector switch contact 2. Coolant in radiators must be at full

level. If multimeter indicates 0 ohms, replace aeration detector. Refer to

page 2-539. If multimeter indicates infinity, repair lead 509C between

aeration detector and low engine coolant level warning light. Refer to page

2-205