DevilsOwn Alcohol Injection System Manual page 11

Connection to Pressure Switch
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Black wire goes from chassis ground (be sure to get a metal on
metal connection,) to the top pin labeled COM on the pressure
switch.
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Pin 1 middle pin labeled NO of the pressure switch goes to pin 85 on
the relay. This is the brown wire.
•
Pin 2 bottom pin labeled NC is not used.
•
Find an accessible vacuum line and cut it in 1/2. We supplied a tee for ¼"
hose. Your vacuum lines maybe another size, if so will need to supply
your own tee. These can be purchased at any local hardware store.
Electrical connection to Relay
*Refer to pin number not color
•
Pin 85 connects to the top pin O on the pressure switch.
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Pin 86 connects to the ignition 12v source in your vehicle
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Pin 87 connects to the Pumps Red wire.
•
Pin 30 connects to the fuse and then to the other end of the fuse to the
+12v source of the battery.
•
Pin 87a connects to nothing.
Adjusting Pressure Switch
Using your finger, turn the adjuster to adjust the turn on PSI. To raise the turn on
PSI, turn to the right. To lower the turn on PSI, turn to the left.
As a general starting point, start off with the top of the wheel adjusted to ½
of your max boost. Lower or rise as necessary.
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