Innovate Motorsports MTX-D, EGT Gauge - Manual (Page 4)

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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 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 the WHITE wire to ground.
2.2 EGT sensor wiring
1. Fish the EGT sensor’s 2 pin connector through the firewall and to the MTX EGT gauge.
DO NOT HARNESS THE LEAD WIRE TIGHTLY ! Make long sweeping bends and
loosely guide the lead-wire to the instrument using the harness ties provided. This will
allow the wire to absorb the engine vibration along the wires length. Prevent the wire
from touching the exhaust pipe when the hood is in the down position. The warranty
does not cover burnt lead wires or wires that are smashed or twisted off.
2. Connect the sensor’s female 2 pin connector to the male 2 pin connector on the gauge.