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7
Electrical 579 Family
Peterbilt Motors Company 7-22
#
Function
Interlock
Default
Range
Options for
Interlock
30
Wheel Diff. Lock Axle
(Rear Rear) w/ Speed
Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable
31
Wheel Diff. Lock Axle
(Dual Rear) w/ Speed
Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable
32
Wheel Diff. Lock Axle
(Front Drive) w/ Speed
Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable
33
Air Accessory (Non-
Latching) w/ Park Brake
Interlock
Park Brakes Set
Optional Add
34
Air Accessory (Non-
Latching)
None
Standard
35
1
Aux Trans 3-Position
Control (AT1202)
None
Standard
36
1
PTO 2-Position
(Fwd/Rev)
None
Standard
37
PTO #1
None
Standard
38
PTO #2
None
Standard
39
Trailer Dump Gate
(single)
None
Standard
40
Trailer Belly Dump
(Center)
(not currently used)
None
Standard
41
Trailer Belly Dump
(Forward)
None
Standard
42
Trailer Belly Dump
(Rear)
None
Standard
43
Trailer Tow / Pintle
Hook
None
Standard
44
Truck Dump Gate
None
Standard
45
Wheel Diff. Lock Axle
(Single Rear)
None
Standard
46
Wheel Diff. Lock Axle
(Forward Rear)
None
Standard
47
Wheel Diff. Lock Axle
(Center Rear)
None
Standard
48
Wheel Diff. Lock Axle
(Rear Rear)
None
Standard
49
Wheel Diff. Lock Axle
(Dual Rear)
None
Standard
50
Wheel Diff. Lock Axle
(Front Drive)
None
Standard
51
Winch Clutch
None
Standard
52 *
All Brakes/ Work
Brakes w/ Speed
Interlock
(a.k.a Winching Brake)
Under Speed Threshold
7
0-10
Standard
53 *
All Brakes/ Work
Brakes
(a.k.a Winching Brake)
None
Standard
54 *
Double Acting PTO
(not currently used)
None
Standard
55 *
Double Acting PTO
Park Brake
Optional Add