TM-5-2350-262-20-1

ARMORED COMBAT EARTHMOVER (ACE), M9

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL; VOLUME 1 OF 3

TM-5-2350-262-20-1 - Page 356 of 776

TM 5-2350-262-20-1

Change 4

3-343.2

Step 9.

Check ventilation fan resistors for continuity.

Disconnect resistor lead (6), circuit 411C, from fan switch at contact 1, and disconnect

the other end of resistor lead (7), circuit 411C, from fan switch at contact 6.

Disconnect resistor lead (8), circuit 411B, from fan switch at contact 4, and disconnect

the other end of resistor lead (9), circuit 411B, from fan switch at contact 6.

Check resistors for continuity.

If continuity is indicated, reconnect resistor lead (6), circuit 411C to fan switch

contact 1, resistor lead (7), circuit 411C and (9), circuit 411B to fan switch

contact 6, and resistor lead (8), circuit 411B to fan switch contact 4.

If an open circuit

is indicated for either resistor, replace malfunctioning

resistor (p 4-244), verify problem is solved.

MASTER

SWITCH