I N S T A L L A T I O N
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 COULD OCCUR.
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
" Do not use excessive force if removal of OE
mirror button is necessary.
" 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
" Do not cut or try to modify temperature sensor
harness in any way.
" 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) REARVIEW MIRROR
CAUTION: DO NOT USE EXCESSIVE FORCE WHEN REMOVING
MIRROR FROM WINDSHIELD. THE WINDSHIELD BUTTON MAY
SEPARATE FROM THE WINDSHIELD OR THE WINDSHIELD MAY
3.1 Screw mount mirror removal
procedure. Note that there are several
versions of mirror mount systems. If unfamiliar
with mirror removal, seek
" 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 screwless
" 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:
" 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
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 POWER HARNESS
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 "A"
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
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 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
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 connection.
6.4 Reinstall and tighten the fastener.
7.0 12-VOLT (POSITIVE) WIRE
7.1 Route the 12-volt red wire to
an ignition controlled wire.
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
7.3 Using a butt connector, scotch lock or t-tap
connector, connect the red ignition wire at this
**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 step 9.0.
9.0 ROUTING THE TEMPERATURE HARNESS (inside the
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.
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 grommet access
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 radiator.
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 front,
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 well,
engine compartment, or too close to the headlamps.
keep the height no higher than the center of radiator,
no lower than 8" above the pavement. Always try
to keep the
temperature probe in the center of the vehicle;
it outside of the frame rails.
9.6 Locate the temperature sensor
9.7 Plug the probe on the connector making sure
that the gray moisture seal
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 the connector
seals. Pull the excess temperature sensor harness
back into the engine
9.9 Use wire ties to secure the temperature sensor
NOTE: Take care to route away from
the accelerator and brake area
so that the harness does not in any way interfere
9.10 Find the grommet that was
removed in order to feed the temperature
sensor harness through the firewall. Using a knife,
carefully slit the
grommet and slide the wires into the grommet and
reinstall the grommet
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
**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
10.0 12-VOLT (POSITIVE) BATTERY
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 when the
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 import
vehicles use a circuit that puts a constant +12
volts to the dome light.
When the door is opened, the door jam switch provides
a path to ground
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 wires.
11.2 Using a multi-meter, check the power at the
door switch wire(s) and
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
11.4 Use a scotch lock or t-tap to connect the
brown wire or butt connector.
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
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
NOTE: If the map light on the Gentex
mirror does not turn off and you
have changed the position of the switch (11.6),
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 ties.
" Under hood - be sure to keep wires away from moving
as steering and brake mechanisms.
" Keep away from extremely hot engine components.
" Interior - wire tie all wires out of the way, making sure to avoid
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 following:
" 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 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.