TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 SERVICE STOPLIGHT DOES NOT WORK—Continued 0042 00 2Y 1. Install bulbs in stoplight-taillight (WP 0278 00). 2. Disconnect circuit 75 lead (1) and circuit 75A lead (2) from stoplight switch (3). 3. Measure resistance between circuits 75 and 75A on stoplight switch. Multimeter should read infinity. 4. Depress switch arm and measure resistance. Multimeter should read continuity. 5. Are readings correct? YES NO 2YN 1. Replace faulty stoplight switch (WP 0274 00). 2. Verify no faults found. 3Y 1. Connect circuit 75 and 75A leads to stoplight switch. 2. Remove circuit 22 plug (1) from left taillight or circuit 23 plug (2) from right taillight. 3. Turn main light selector switch lever on light switch to STOP LIGHT. 4. Measure voltage between circuit 22 (left) plug (1) or circuit 23 (right) plug (2) and ground with brakes applied (on M548A1 both right and left steering levers locked in park position). 5. Does multimeter read less than 17 volts? YES NO 3YN 1. Install circuit 22 and 23 plugs on left and right taillights. 2. Replace service or blackout stoplight bulb (WP 0278 00). 3. Verify no faults found. 0042 00-2