Electrical 579 Family
Peterbilt Motors Company 7-2
BODY BUILDER CONNECTION POINTS
Becoming familiar with the various connectors available to the aftermarket installer is important. This section contains
reference information for the connectors that are used to add equipment.
Harness Design
The 579 and the vocational 567 are designed and manufactured with a cab harness that is chassis specific. The new
design minimizes the number of connectors which improves routing, reduces electrical problems and reduces diagnostic
time when servicing. The new design, however, changes the way electrical components are added to the vehicle for final
use customers. The after-market installer will have several options available:
1. Ensure that the vehicle is ordered and specified with the equipment installed or at least have ‘furnish by owner’
provision.
2. Install electronic accessories outside of the CECU network, direct power from the power distribution center and no
splicing into the cab harness.
3. Route new wires and install pins to the designated pin location on all connectors.
It is imperative that the installer never splice into a cab harness for signal or power purposes.
Remote Throttle and Remote PTO Control
The body builder will need to find the 12-pin remote throttle connector, located in the engine compartment on the engine
harness. See the PTO Section for additional information
FIGURE 7-2. 12 Pin Connector
Spare Power
Spare power is located at the fuse panel or connector P001.
Air Solenoid Ground
Air solenoids are grounded to connectors P157 and P185 which are located behind the overbell between the air manifold
and the chassis node.
Cab Switch Backlighting
Splice blocks P011 and P013 provide power for switch lighting. These are located behind the panel to the right of the
steering column. In some instances, you may need to remove the instrument cluster.
