Innovate Motorsports MTX-L - Manual (Page 4)

4
2 Installation
2.1 Wiring
The MTX-L has 5 stripped wire ends:
1 Connect
the RED wire to an isolated switched 12V source in your
vehicle. A switched 12V source goes ON as soon as “key on” power is
active. The circuit to which you will pull power from should be able to
support a 3 amp draw. Make sure this connection is protected with a 5A
fuse.
Circuits that share power with the vehicle’s stereo, ignition system,
ECU, lighting, or fuel pump should not be used. When in doubt, create an
additional circuit using an automotive relay available at any automotive parts
supplier. See the next section for a relay installation diagram.
2 The
BLACK wire should be grounded to a solid ground source. The
best possible ground source would be the battery ground (-) post.
If other Innovate Motorsports devices are going to be daisy-chained
along with the MTX-L, it is recommended that all devices be connected to a
single ground point, ideally the battery ground (-) post.
3 Connect
the WHITE wire to a headlight power wire (a wire that supplies
current to the headlights). 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.
4
Optionally, the YELLOW (Analog out 1) and/or BROWN (Analog out 2)
can be connected to the analog inputs of other devices such as data
loggers or ECUs. If either one or both of these wires are not being used
isolate and tape the wire(s) out of the way. The default analog outputs
are as follows: Analog output one (yellow) is 0V = 7.35 AFR and 5V =
22.39 AFR. Analog output two (brown) is 1.1V = 14 AFR and .1V = 15
AFR.