MTX-1015
12 Volt Radar Detector Power Cord
With In Line Fuse
Guidelines on Using a Voltmeter to
Locate Power and Ground
©2016 J28 Design Inc.
Manufactured in USA
WWW.MIRRORTAP.COM
15”
OVERALL LENGTH
RJ11 CONNECTOR
MTX Series
2 Amp in line fuse
“Power Up” Your Radar Detector
by TAPPING Into Your
Rear View Mirror’s Wire Harness
1. First set your voltmeter to the continuity
setting (should beep when you touch the red
and black probes together, telling you they are
shorted).
2. Find a ground on the car somewhere, like a
bolt under the dash, or a metal cross membebolt under the dash, or a metal cross member.
3. Put the black probe on that ground, and
touch the back of each exposed wire connector
in the mirror harness with the red probe.
4. For each wire that beeps, that means that
wire is grounded.wire is grounded. Turn the ignition to the on
position, then back to off, and make sure it
beeps regardless of the ignition position.
5. Put the voltmeter into VDC mode, to
measure DC volts, turn the ignition to the on
position.
6. Put the black probe on the ground wire
found in #4.
7. Touch each of the wires in that harness with
the red probe, and note which one(s) gives you
+12-14 volts, turn the ignition off to verify that
the volt readings go down to zero or close tothe volt readings go down to zero or close to
zero.
8. That should define which two ports in that
harness into which you would plug the
MirrorTap, the black Prong into #4 above, and
the Red to #7.
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