2. Locate a vacuum source on the intake manifold, after the throttle
body and connect it to the hose fitting on the sensor. Use the
provided “T” and hose to make this connection if needed. To secure
the hose use tie-wraps or hose clamps.
2 Wiring
2.1
Main Gauge Wiring
1. Connect
the
RED
wire to a switched 12V source. A switched 12V source
comes ON as soon as the ignition on the car is keyed on. Make sure the
connection is fused with a minimum fuse size of 2A.
Circuits that share power with the vehicle’s stereo, ignition
system, and fuel pump are not recommended.
2. Connect the main
BLACK
wire to a ground source. Note that there are
other black wires coming out of the 2 pin and 3 pin connectors, these are
not the main gauge grounds. Avoid noisy ground sources, such as
grounds used for the radio and or ignition.
3. Connect
the
WHITE
wire to a headlight power wire (a wire that supplies
current when the headlights are on). This enables the display to dim for
better nighttime viewing. DO NOT CONNECT THIS WIRE TO THE
HEADLIGHT DIMMING WIRE. Connection to this rheostat type of switch
will cause the gauge to malfunction. If you chose not to utilize the
dimming feature, connect this WHITE wire to ground.
