TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1269 of 1313
LOSS OF AMBER WARNING LIGHT AND/OR OVERSPEED LIGHT - Continued
STEP
4.
DOES WARNING LIGHT FLASH?
a.
Refer to point to point schematics.
T0463DAA
ECU
HARNESS
CONNECTOR
BLACKOUT
WIRE #463
CTIS WIRING
HARNESS
CTIS AMBER
WARNING LIGHT
Figure 3.
CTIS Wiring Harness.
CAUTION
Turn battery switch to OFF position before disconnecting or connecting ECU wiring
harness. Failure to do so may result in damage to ECU.
b.
Turn battery switch OFF.
c.
Disconnect blackout wire #463 from CTIS wiring harness.
CONDITION/INDICATION
DOES WARNING LIGHT FLASH?
DECISION
YES - Go to Step (5).
NO - Replace faulty CTIS wiring harness (Volume 2, WP
0322). Go to Step (7) to verify problem is solved.
TM 9-2320-272-23-1
0150
0150-4
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