COMPASS REFERENCE GUIDE
Is there a display in
compass window?
Does the compass
display read “C”?
Is the incorrect direction
displayed?
Is the mirror receiving
+12V?
Press compass
display button (if
available).
SET ZONE:
1. Press and hold compass display /
power button (if available).
2. Release button when zone number
(1-15) is displayed.
3. Use zone map to verify your
location.
4. Use compass display / power
button to select correct zone.
5. Allow selected zone to clear from
display.
6. Press and hold compass display /
power button until “C” is displayed
ENSURE:
1. EC mirror harness power wire
is securely tapped into OEM
harness.
2. Ignition wire is receiving +12V.
3. Ground wire is securely
attached to vehicle ground.
Contact OEM dealership
for replacement harness.
Is the zone location set to
your location?
*OEM = Original Equipment Manufacturer (ex. Ford, GM, etc)
* This is intended as a tool for self-diagnosis. Gentex advises
contacting your local dealership for assistance.
YES
STILL NO
NO
NO
CALIBRATE:
Follow calibration
instructions listed.
YES
Compass functions to design
intent.
YES
YES
NO
NO
START
Make sure vehicle is
running or key is turned
to the “on” position
to ensure mirror is
receiving power.
NO
YES
HowtoTroubleshootYourCompassMirror
Calibr
ationinstructions:
1) Ifthecompassdisplayreads“C”thecompassfeaturemustbecalibrated.
a) Tocalibratethecompass,drivethevehicleinupto3completecirclesatlessthan5mph.
SettingtheCorrectZone
1. Pressthepowerbutton(ifavailable)formorethan9seconds,oruntilthecurrentZone.
2. FindyourcurrentlocationandvarianceZoneNumberonthezonemaponthepagesbelow.
3. Pressthepowerbutton(ifavailable)untilthenewdesiredZoneNumberappearsinthe
display.
4. Withinafe
wsecondsacompassdirectionwillbedisplayedandthenewzoneisset.
Note:Itisrecommendedtotakeyourvehicletoyourlocaldealershipifyourmirrordoesnothave
apowerbutton.
Note:Installingitemssuchasaskirack,antenna,luggagerack,orrecentbo
dyrepaircancause
changestothevehicle’smagneticfield.Thismayrequirethatthecompassberecalibratedby
performingtherecalibrationprocedure
15
14
14
13
13
13
12
12
12
11
11
11
10
10
10
9
9
9
8
8
8
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
2
2
2
1
15
1
1
3
GNTX
NOAA/NCEI
World Magnetic Model, Epoch 2020−2025
Generated for 2025 at 0m AMSL
© 2016, 2019 Gentex Corporation
USGS
National Atlas of the United States
World Boundary Data Bank II
(For Reference Only)
Compass Zone Map
15
14
13
12
11
10
9
8
7
6
5
4
3
GNTX
Magnetic Zone Variation Map
Map Data (for reference only): USGS,
National Atlas of the United States,
World Boundary Data Bank II
Magnetic Field Data: NOAA/NCEI
WMM2020 (Data for 2025)
© 2016, 2019 Gentex Corporation
14
13
12
11
10
9
8
7
6
5
4
3
GNTX
Magnetic Zone Variation Map
Map Data (for reference only): USGS,
National Atlas of the United States,
World Boundary Data Bank II
Magnetic Field Data: NOAA/NCEI
WMM2020 (Data for 2025)
© 2016, 2019 Gentex Corporation
11
10
9
8
7
6
5
4
3
GNTX
Magnetic Zone Variation Map
Map Data (for reference only): USGS,
National Atlas of the United States,
World Boundary Data Bank II
Magnetic Field Data: NOAA/NCEI
WMM2020 (Data for 2025)
© 2016, 2019 Gentex Corporation
13
12
11
10
9
8
8
7
7
6
6
5
4
3
2
1
GNTX
Magnetic Zone Variation Map
Map Data (for reference only): USGS,
National Atlas of the United States,
World Boundary Data Bank II
Magnetic Field Data: NOAA/NCEI
WMM2020 (Data for 2025)
© 2016, 2019 Gentex Corporation