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DOCUMENT 19581
2.2 Connecting the wiring
1. Connect the short cable with the green 7
pin connector from the switching box to
the matching connector from the control
panel. Secure the cable inside the left
frame rail with the vehicle harness. Leave
enough slack in the cable for the cab to
tilt.
2. Connect the white 4 wire connector to
the matching connector on the interface
cable. Remove the lid on the vehicle
electrical box and feed the green wire
with the ring terminal up through the
drain hole in the box. Connect this wire
to one of the common ground rail
connections inside the box.
3. Locate the yellow wire (with weather-
pack connector) in the OEM harness
near the electrical box. Test to make
sure that there is battery voltage present
when the ignition switch is in the “ON”
position.
Interface
connection
to switching
box
To OEM 12 V ignition power
T
o compressor clutch
OEM 12 V replacement
Ground
T
o blowdown solenoid
Interface Cable
4. Connect the red wire with the weather pack
connector to the yellow wire. An additional
connector is also provided for alternative
power sources. The additional connector is
part of our interface cable and is a
replacement for OEM yellow. Fit the male
weather-pack blank plug to the additional
connector.
5. Route the grey two-core cable with the
square cap plug along the cross member and
under the vehicle to the back of the VR7000
tank Connect it to the blow-down solenoid
on the back of the tank. Make sure that the
rubber gasket is in place and fasten it to the
solenoid with the screw. Secure the cable to
the vehicle harness or other components.
6. Route the white single wire and the gray 4 pin
cable along the cross member, follow the
vehicle harness and hoses and route them
inside the right hand frame rail towards the
radiator. The white wire will be connected to
the VR7000 compressor clutch and the gray
cable to the compressor temperature probe.
Gra
7-core cable
Green 7-pin
connector Gra
4-core cable
Control
Panel
Switching Box
Male weatherpack
OEM female weatherpack
Green 4-pin
connector Compressor
clutch
Red
White
OEM 12 V yellow
Gray 3-core cable
Blow down
solenoid
Green
OEM common
round rail
Wiring Schematic
Interface Cable