Instructions for Universal Harness
These instructions have been prepared to provide you with
details necessary for complete installation of the Gentex
Automatic Dimming Mirror, Gentex Automatic Dimming
Compass/Temperature Mirror, or Gentex Auto
Dimming/Compass/Temperature Mirror with Map Lights. Be sure to
read all instructions prior to beginning the installation.
Follow all the safety guidelines outlined in this instruction
book as well as those set forth by industry and government.
Please direct all operational or troubleshooting questions to
our MITO Customer Service Department toll-free at (800)
433-6486. This Gentex Rearview Mirror Universal Harness is
designed for use in applications where a custom harness is not
available for your vehicle.
IT IS IMPORTANT THAT YOU OBTAIN THE CORRECT
INFORMATION FOR YOUR VEHICLE, OR DAMAGE TO THE WIRING SYSTEM
One (1) Mirror
One (1) Harness
One (1) Temp Probe Harness (only on comp/temp mirrors)
One (1) Temp Sensor (only on comp/temp mirrors)
One (1) Hang Tag
Tools Required for Proper Installation:
DC Voltmeter Trouble light or
Crimping Pliers Power Drill
Torx Driver #20 9/16" Drill Bit
Phillips screwdriver Knife
1.1 Inspect mirror for damage
1.2 Check Parts List for accuracy.
2.0 PREPARATION FOR ROUTING THE HARNESS
(Inside the Driver's Side Area)
2.1 Remove the "A" pillar (windshield post)
trim molding, upper windshield
trim molding (if applicable), and kick panel trim.
" Do not use excessive force when removing OE
mirror from windshield. The windshield button may separate
from the windshield or the windshield may break.
" Do not use excessive force if removal of OE mirror button is
" Do not route wiring over sharp metal edges or allow to be
pinched behind trim to avoid causing an electrical short or
break in the wire.
" Manufacturer/distributor not responsible for
" Contact original purchase source if additional information
is desired regarding these products.
" For installation situations that installer is not familiar
with, a qualified installation technician or mechanic should
be consulted for assistance.
" Use wire ties to hold wires away from hot engine and
critical parts such as brake and steering systems.
" Do not cut or try to modify temperature sensor harness in
" Contact your local auto dealership or auto sound center to
obtain detailed information pertaining to your specific
automobile wire color information.
3.0 REMOVE ORIGINAL EQUIPMENT (OEM)
CAUTION: DO NOT USE EXCESSIVE FORCE WHEN REMOVING MIRROR FROM
WINDSHIELD. THE WINDSHIELD BUTTON MAY SEPARATE FROM THE
WINDSHIELD OR THE WINDSHIELD MAY BREAK.
3.1 Screw mount mirror removal procedure. Note
that there are several
versions of mirror mount systems. If unfamiliar with mirror
" Using a Philips screwdriver or a #20 torx bit, loosen the
screw in the base of the mirror.
" After loosening screw, gently lift upward to slide mirror
off of mirror mount.
3.2 Wedge mount mirror removal procedure: (Common Method for
" Using a small 1/8" (4 mm) flat-blade
screwdriver, insert the flat end into the opening at the
bottom of the mirror mount at the windshield.
" Slide the screwdriver into the center of the mirror mount
until resistance is felt.
" Gently apply a small amount of additional upward force to
lift away locking spring in the mount.
" While still applying upward pressure with the screwdriver,
grasp the mirror bracket and wiggle side to side. Lift mirror
up toward the headliner and off the windshield mount button.
3.3 Camlock Mirror Removal procedure: (Common
" Grasp the base of the mirror.
" Rotate 90 degrees left or right.
" Slide mirror downward toward dash to remove.
4.0 INSTALL NEW INTERIOR MIRROR
4.1 Wedge Mount Mirror Installation:
" Slide the mirror bracket over the mirror
button on the windshield.
" Rock mirror side to side to aid installation until mirror
fits tightly onto mirror button.
" Use #20 Torx screwdriver to tighten locking screw through
hole in center of compass pod below mirror mount.
NOTE: If Gentex Mirror does not fit button on your windshield,
it is possible that one of our adapter plates may, i.e. for
some foreign manufactured vehicles. It may also be possible
that the mirror button will have to be replaced with one that
is compatible with the Gentex mirror, i.e. Fords built prior
to 1996. If you need information concerning one of our Gentex
adapter plates or a mirror button kit, please contact your
Gentex mirror retailer.
5.0 ROUTING OF THE GENTEX UNIVERSAL
NOTE: Locate the Gentex power harness. It will
have a flat 7 or
10-pin connector which plugs into the mirror.
5.1 From the bottom of the driver's side dash,
near the post location, feed this
connector up along the side of the dash to the opening at the
pillar near the base of the windshield. Pull the harness up
far enough to
reach the mirror location.
5.2 Plug in the harness connector to its mirror counterpart.
Route the harness
straight up to the headliner.
5.3 Gently pull down the front edge of the
headliner and tuck the harness up
under the edge of the headliner.
5.4 Continue tucking the harness under the headliner along the
top of the
windshield working your way over to the driver's side "A"
pillar. Dress the
harness along the "A" pillar down to the dash opening.
NOTE: It will probably be necessary to tape
these wires in place,
or wire tie them to the existing factory harness.
|+12V supply switched by ignition
|+12V reversing signal (back-up lights)
|+12V constant power (battery)
|Connected to +12V dome light circuit
6.0 GROUND WIRE CONNECTION
6.1 Locate an existing bolt or screw that is
in contact with the vehicles metal
body in the area of the driver's step well.
6.2 Route the mirror ground wire (black) to the ground point.
6.3 Remove the bolt or screw from the ground point and install
the ring terminal over the ground bolt/screw. Scrape off paint
from mounting surface, if necessary, to obtain a solid
6.4 Reinstall and tighten the fastener.
7.0 12-VOLT (POSITIVE) WIRE CONNECTION
7.1 Route the 12-volt red wire to an ignition
NOTE: If mirror remains on at all times, it
could eventually drain the car's battery.
7.2 Power source - Using a multi-meter, check
for wire exiting fuse block that tests positive for being
controlled by the ignition switch. The power must turn off
when the ignition is in the OFF position.
7.3 Using a butt connector, scotch lock or t-tap connector,
connect the red ignition wire at this time.
8.0 12-VOLT (POSITIVE) REVERSE LAMP
8.1 Route the white wire to a reverse
8.2 Using a multimeter, check for a wire at fuse block or in
driver's step well area that tests for positive when shifting
the vehicle into reverse.
8.3 Using a butt connector, scotch lock or t-tap connector,
connect the wire to the reverse circuit wire at this time.
NOTE: The use of this optional wire is at your
discretion. When vehicle is in reverse, it un-dims the mirror
for better visibility.
**READ** - If you are installing a
50-9053781M, proceed to step 12.0. If you are
installing a 50-9050549001M or 50-9050620001M, continue with
9.0 ROUTING THE TEMPERATURE HARNESS (inside the engine
9.1 Open the hood of the vehicle.
9.2 Locate the temperature sensor portion of your harness. It
is the section with the green wires.
9.3 Locate a grommet in the firewall near the interior harness
location and remove it.
NOTE: If a grommet is not available, drill a
9/16" hole in a safe and
convenient place to feed the 2-pin connector through. Take
care not to cause damage to objects in the passenger
compartment when drilling.
9.4 Locate the temperature probe harness and
lay it out with the 2-pin connector
toward the firewall. Pass this connector through the hole or
to just inside the passenger compartment.
NOTE: It is important that the 2-pin connector
be inside the vehicle to
prevent moisture from coming in contact with it.
9.5 Route the rest of the harness towards the front of the
vehicle over the fender well to an area in front of the
NOTE: The preferred location for the
temperature probe is in the center
of the grille or some place where it will be in free air in
or to the side, of the radiator. Down near the bumper may also
be used. Avoid locating it inside or in front of the wheel
engine compartment, or too close to the headlamps. Try to
keep the height no higher than the center of radiator, and
no lower than 8" above the pavement. Always try to keep the
temperature probe in the center of the vehicle; never locate
it outside of the frame rails.
9.6 Locate the temperature sensor probe.
9.7 Plug the probe on the connector making sure that the gray
seats inside the probe collar.
9.8 Clip on the temperature sensor probe. Do not install it
pointing toward the
rear of the car or pointing downwards, as water may get past
seals. Pull the excess temperature sensor harness back into
9.9 Use wire ties to secure the temperature sensor harness.
NOTE: Take care to route away from the
accelerator and brake area
so that the harness does not in any way interfere with their
9.10 Find the grommet that was removed in
order to feed the temperature
sensor harness through the firewall. Using a knife, carefully
grommet and slide the wires into the grommet and reinstall the
back to is original position in the firewall.
9.11 If you have not already plugged the temperature sensor
harness into the
main power harness mating plug, do so at this time.
**Read** - If you are installing a
50-9050549001M, proceed to step 12.0.
If you are installing a 50-9050620001M, continue with step
10.0 12-VOLT (POSITIVE) BATTERY WIRE
10.1 Route the yellow wire labeled battery to
a constant power source.
10.2 Power source - Using a multi-meter, check for a wire at
the fuse block
that tests positive for +12 volts. The power must be present
ignition is in the OFF position.
11.0 MAP LIGHT WIRE CONNECTION
11.1 There are two (2) types of dome light
circuits used in automobiles.
Type A. All General Motors, most Chrysler, and some Ford
vehicles use a circuit that puts a constant +12 volts to the
When the door is opened, the door jam switch provides a path
and the light comes on. In this case the wire at the switch
will have +12 volts when the door is closed and 0 volts when
the door is open.
Type B. Most full-size Ford and some Chrysler vehicles use a
circuit that has two wires at the door jam switch. When the
door is closed, there is +12 volts on one wire but not the
other. When the door is open, there is +12 volts on both
11.2 Using a multi-meter, check the power at the door switch
determine if the circuit is Type A or Type B. Contact your
local auto dealership or auto sound center to obtain detailed
information pertaining to your specific automobile wiring.
11.3 Route the brown wire to a location so it
can be connected to the proper wire at the door switch. The
wire at the door switch must change from +12 volts to 0 volts
or 0 volts to +12 volts when the door is opened or closed!
11.4 Use a scotch lock or t-tap to connect the brown wire or
11.5 Test the map lights on the mirror and compare it with the
vehicle's dome light. Both the map lights and dome lights
should turn on and off together.
11.6 If the mirror map lights work opposite of the dome light,
open the black box connected to the brown wire and change the
position of the switch inside.
NOTE: If the map light on the Gentex mirror
does not turn off and you
have changed the position of the switch (11.6), disconnect
brown wire and repeat step 11.2.
12.0 SECURING WIRE HARNESS
12.1 Now that all wires from temperature probe
harness and the main harness
have been installed, they will need to be secured with wire
" Under hood - be sure to keep wires away from
moving parts such
as steering and brake mechanisms.
" Keep away from extremely hot engine components.
" Interior - wire tie all wires out of the way, making sure to
steering and brake components.
13.1 Turn the ignition switch to ON.
13.2 With the vehicle in a fairly well lit area, perform the
" Push and hold temperature switch for 15
seconds ON/OFF. Auto dimming is enabled when green LED is on.
" Cover the forward-looking photocell located on the back side
of the mirror (a dark cloth or towel will work).
" After a few seconds, the mirror will begin to darken (the
time may vary with ambient light levels).
" Remove the cover from the forward photocell and the mirror
will begin to clear.
" With car in garage facing back wall, shift into reverse with
foot on brake.
" Mirror should un-dim to verify optional reverse safety
feature. (Will function only if white +12V reverse trigger was
connected during installation.)
" Mirror testing is now complete.
14.1 You are now ready for final assembly of
removed components and calibration of your mirror. Operating
instructions for your mirror are located on a hang tag
provided with your mirror kit.
Complete Parts List Required for Installation
|E.C. Electronic Rearview Mirror - Alternating Display
E.C. Comp Temp (Dual Display)
E.C. Only Mirror
E.C. Comp/Temp and Map Lights
|Temperature Sensor Harness (only on comp/temp mirrors)
Temperature Sensor (must be used with the
|Hang Tag for Mirror Operations (Auto Dim)
Hang Tag for Mirror Operations (Auto Dim/Comp/Temp)
Hang Tag for Mirror Operations (Auto Dim/Comp/Temp/Map
|Wire Harness (2-pc) With Mounting Hardware
to Automatic Dimming Mirror