- 4 -
It is wired by connecting to the provided wires.
MeterMatch-VR requires the connection of five wires. The signals are:
Red
+12V power. The red wire is connected to a 12V power
source that is powered only when the ignition is turned on.
Typically, this can be connected to the back of the ignition
switch on the accessories terminal.
Blue
Signal from sender. The blue wire is connected to the signal
from the sender. This was previously connected to one side
of the gauge. If you aren't sure which wire it was,
disconnect them one at a time, and measure the voltage
with the ignition turned on. One of the wires will read about
5V (or a pulsing voltage), and the other will read zero volts -
that's the sender wire that you want. Connect it to the blue
wire from MeterMatch-VR.
White
Signal to gauge. The white wire connects to the terminal on
the gauge that the factory sender previously connected to.
Orange +5V to power the gauge. The orange wire connects to the
side of the gauge that used to be connected to the car's 5V
power supply. Disconnect that wire from the gauge, and
leave it disconnected, it will no longer be used. In its place,
connect the orange wire from the MeterMatch-VR.
Black
Ground. The black must be connected to a good ground.
Notes:
- The gauges installed in most early Ford/Chrysler products typically don't care if the two terminals
are reversed, both are isolated and polarity independent, but it's a good idea to connect them in the
same polarity (power and signal) as originally wired.
- Don't attempt to power more than one gauge from the orange wire from the MeterMatch-VR, it is
designed to only provide enough current for one gauge, and could otherwise overheat.
- MeterMatch-VR is provided with wires and terminals that are often used in this application, but yours
may be different. Don't hesitate to lengthen or shorten the wires or install your own terminals. If you
use the provided stainless 10-32 nuts on the back of your gauge, they may thread on with a little
difficulty since the threads on the post may be slightly deformed from the factory push-on connectors.
- Some gauges may be connected to a one-sided circuit board. In this case, you will need to isolate
the two terminals from the dash-board circuit PCB prior to connecting the MeterMatch.
TechnoVersions offers supply isolation, stepped washers for a low price.
