Installation Manual

MN-333

NOTE

3. Connect wiring harness #1 to the back of the gauge panel (Fig. 4).

a. With your thumb against the front side of the switch, connect the wire by pushing

the female connectors onto the blade connectors on the switch.

b. Push the air line onto the “T” tting until the air line completely covers the barb (Fig. 4).

Lubricating the air line with soapy water will ease pushing the air line over the barb.

c. Do not connect the power wire at this time.

d. Wiring harness #1 also connects the gauge panel to the low pressure sensor

assembly. The low pressure sensor protects the air springs from failure resulting

from low pressure in the unloaded condition. The sensor is preset to maintain a

MINIMUM pressure of 10 PSI in the air springs. The sensor measures the pressure

in each spring and turns on the compressor if the pressure falls below 10 PSI.

The low pressure sensor is preassembled onto wiring harness #1. The sensor should be

located under the dash inside the vehicle and secured with the provided tie straps.

4. Attach harness #2 to the compressor unit.

a. Push the air line completely over the barbed tting on the compressor and connect

the power wire (red) (Fig. 7).

5. Route wiring harness #2 from the compressor.

a. Use existing grommets in the oorboard or rewall to route the harness from the

compressor to the low pressure sensor.

b. In some cases, a hole may have to be drilled to allow access for the harness. Drill

a 5/8” diameter hole and install the provided grommet (Fig. 8). It will be necessary

to seal any grommets or holes that have been cut, drilled or removed so as not to

allow elements to enter the cab area of the vehicle.

c. When routing wiring harness #2 from the compressor, it should not be routed so as

to lay on, or near, the exhaust pipe/mufer/catalytic convertor of the vehicle. Routing

along the top of a crossmember or over a heat shield is recommended.

g. 6

Compressor

Floor plan

Frame

L-bracket

Supplied self

tapping screw

1/4” Bolt and nut will

need to be provided if the

L-bracket is fabricated.

Barbed fitting

Ground Power (red) wires

Air line

to air springs

Harness #2

Load Controller II