MWO-9-2320-272-35-1
MODIFICATION OF 5-TON M939, M939A1, M939A2 SERIES FAMILY OF VEHICLES (FOV)
M939 BRAKE STABILIZATION PROGRAM (RETROFIT OF ANTI-LOCK BRAKE SYSTEM (ABS) FOR M939 FOV); MODIFICATION WORK ORDER
JANUARY 2007
CHANGE 1
MWO-9-2320-272-35-1 - Page 24 of 109
MWO 9-2320-272-35-1
22
(164)
Attach red lead conductor of power cable to fusible straight harness (15 amp) (WEL10464) connector
as shown in figure 65.
(165)
Attach white lead conductor of power cable to female connector on ground Y-harness connector
as shown in figure 65.
(166)
Attach lamp/relay lead No. 3 to remaining connector on ground Y-harness as shown in figure 65.
(166)
Attach lamp/relay lead No. 1 to black lead connector of power cable as shown in figure 65.
(167)
Attach lamp/relay lead No. 2 to purple lead connector of power cable as shown in figure 65.
(169)
Attach lamp/relay lead No. 4 to connector on fusible pigtail harness (3 amp) connector as shown
in figure 65.
(170)
Attach remaining fusible pigtail harness (3 amp) connector to yellow lead connector of power cable
as shown in figure 65.
(171)
Secure all wiring with WTS800UVBK tiedown straps as required under dash.
NOTE
NOTE
Perform steps 172 through 175 for M939/A1 vehicles.
(172)
Remove nut from bolt on passenger side frame rail beside air dryer as shown in figure 66.
(173)
Install ground lead from WEL20751 air dryer harness on passenger side frame rail bolt with
WWS1-2X125 star washer and WNHL1-2-20G8 locknut as shown in figure 66.
(174)
Connect power lead connector on air dryer harness to 28-volt heater connector on air dryer as
shown in figure 66.
NOTE
NOTE
Circuit lead 587 is located at front of vehicle above and
around engine starter.
(175)
Route positive lead of air dryer harness to front of vehicle. Remove existing plug from lead 587
and connect positive lead connector from air dryer harness to lead 587 as shown in figure 66.
NOTE
NOTE
Perform steps 176 through 179 for M939A2 vehicles.
(176)
Remove nut from bolt on from passenger side frame rail beside air dryer as shown in figure 67.
(177)
Install ground lead of WEL20750-B air dryer harness on passenger side frame rail bolt with
WWS1-2X125 star washer and WNHL1-2-20-G8 locknut as shown in figure 67.
(178)
Install power lead connector on air dryer harness to 28-volt heater connector on air dryer and
other end of harness positive lead to existing Y-connector on passenger side frame rail as shown
in figure 67.
(179)
Install WEL7982907 dummy connector in WEL8338561 shell and install shell in opening on
Y-connector at passenger side frame rail as shown in figure 67.
(180)
Secure all tubing (figure 68) and wiring with WTS800UVBK tiedown straps every 6 to 8 in.
(181)
Connect battery ground cables. (Refer to TM 9-2320-272-24.)
c.
Preliminary Inspection and Test
(1)
Connect battery ground cables (TM 9-2320-272-24).
(2)
Connect Haldex Info-Centre diagnostic tool to diagnostic connector located inside cab on
passenger side according to tool instructions.
(3)
Start engine and charge air system to normal operating pressure (TM 9-2320-272-10).
(4)
Ensure both primary and secondary reservoirs are filled.
Back to Top
