TM-9-2320-338-10
TRUCK, CARGO, 8X8, M977A4
TECHNICAL MANUAL; OPERATOR'S MANUAL
OCTOBER 2008
TM-9-2320-338-10 - Page 169 of 1120
Table 1.
Instrument Panel Controls and Indicators. - Continued
Key
Control/
Indicator
Function
CENTER (middle) - Blackout markers located in the compo-
site lights illuminate.
UP - Blackout markers and blackout driving light illuminate.
Blackout stop lights illuminate when Service Brake Pedal is
applied.
50
Anti-Lock
Brake System
(ABS) Disable
Switch
Disables vehicle anti-lock brake system. The automatic trac-
tion control (ATC) indicator (45) will also illuminate steady
(amber) when ABS is disabled.
51
Engine Brake
High/Medium/
Low Switch
(Three-Posi-
tion)
The engine brake high/medium/low switch becomes active
when the engine brake ON/OFF Switch is set to on position.
The amount of engine braking provided is dependant on the
position of the engine brake high/medium/low switch:
(1) - High position (full up) provides maximum engine braking.
(2) - Medium position (center) provides less engine braking.
(3) - Low position (full down) provides least amount of engine
braking.
52
Engine Brake
On/Off Switch
Turns the engine retarder on/off which provides engine brak-
ing to the vehicle. The amount of engine braking provided is
dependant on the position of the Engine Brake High/Medium/
Low Switch.
TM 9-2320-338-10
0020
0020-11
Back to Top
