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VU4 (Valve Unit) Mounting:

Valve Mounting Considerations

• These valves are 100% weather-proof and can be mounted under vehicle.

• You will need to mount the ECU near the valves, so make sure that there is

enough space for both items.

Step-by-Step

1.) Find a at location to mount the VU4. This should allow enough room for

the airlines to be inserted without too much bending.

2.) Transfer hole pattern from the VU4 Mounting Template on page 14.

3.) Drill holes with a 3/16” drill bit and bolt the VU4 down with the included #10-24

Allen head cap-screws.

4.) Place the ground eyelet from the VU4 wiring harness under one of the

cap-screws and make sure that this screw has good contact to chassis ground.

(Remove paint or coatings to expose bare metal)

5.) You may use this same location to place the ECU ground, so do not tighten

yet.

V_GND

Ground Eyelet Installation Wire Color Description

1.) Up 4 White/Black

2.) Up 3 White/Orange

3.) Up 2 White/Purple

4.) Up 1 White

5.) Down 4 White/Gray

6.) Down 3 White/Green

7.) Down 2 White/Brown

8.) Down 1 White/Blue

When using other

MFG’s valves:

1 2 3 4

5 6 7 8

AccuAir SwitchSpeed User Manual

Questions and Answers: