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Electronic compass for overhead console does not work. How do you access?

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These units are poorly designed and fail frequently. Removal instructions are on the website: www.autoclockrepair.com
We offer a repair service with a lifetime guarantee. Drop us a note if you have any questions, thanks!

Posted on Nov 25, 2011

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Compass not working on 2006 Mercury Grand Marquis


Electronic Compass The compass display and module are contained in the overhead console and are replaced as an assembly. For additional information, refer to Section 501-12 . The compass display can be turned off and on by pressing the MODE button in the overhead console. The vehicle heading is displayed as one of N, NE, E, SE, S, SW, W, or NW.
Inspection and Verification
NOTE: Press the MODE button to turn on the display.
  1. Verify the customer concern by operating the vehicle along roads of known direction to duplicate the customer concern with the compass.
  1. Visually inspect for obvious signs of mechanical or electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Compass module
  • Central junction box (CJB) fuse 15 (7.5A)
  • Circuitry

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the fault is not visually evident, determine the symptom and GO to Symptom Chart .
Pinpoint Test A: The Compass Is Inaccurate/Inoperative
Normal Operation The compass receives battery voltage from the central junction box (CJB) through circuit 964 (DB/LG). Ground for the compass is supplied through circuit 676 (PK/OG).
    Possible Causes
  • fuse
  • circuit 676 (PK/OG) open
  • circuit 964 (DB/LG) open or short to ground
  • compass zone setting
  • compass calibration
  • compass module
PINPOINT TEST A: THE COMPASS IS INACCURATE/INOPERATIVE NOTE: Always set the zone and calibrate the compass before replacing an inaccurate compass.
NOTE: After installing a new compass, always set the zone and calibrate.
Test Step Result / Action to Take A1 CHECK THE OVERHEAD COMPASS DISPLAY
  • Key in ON position.
  • Check the overhead display.
  • Does the overhead compass display remain on after prove out?
Yes
GO to A3 .

No
GO to A2 . A2 CHECK THE COMPASS MODE
  • Press and release the SELECT switch on the overhead console.
  • Does the overhead compass display turn on?
Yes
If the compass display turns on correctly, GO to A3 . If the compass display turns on, but the heading is inoperative/inaccurate or the display indicates VAR, GO to A4 . If the compass display turns on, but it does not display all directions, or indicates CAL, GO to A5 .

No
GO to A7 . A3 CHECK THE COMPASS DIMMING
  • Turn the headlamp switch to the parking lamps ON position.
  • Does the compass display dim?
Yes
TURN the headlamp switch to the OFF position. GO to A4 .

No
TURN the headlamp switch to the OFF position. GO to A8 . A4 CHECK THE COMPASS ZONE SETTING
  • Set the compass to the correct zone for your location. Refer to Compass Zone Adjustment in this section.
  • Does the zone adjustment set correctly?
Yes
GO to A5 .

No
INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation. A5 CALIBRATE THE COMPASS
  • Calibrate the compass. Refer to Compass Calibration in this section.
  • Is the compass calibrated correctly?
Yes
GO to A6 .

No
INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation. A6 CHECK THE COMPASS ACCURACY
  • Position the vehicle at each of the 8 directions (N, NE, E, SE, S, SW, W, NW) and verify that the displayed heading is accurate. The vehicle must be stationary for at least 10 seconds at each direction.
  • Is the compass display accurate in each direction?
Yes
The compass is OK. REVIEW the operation of the compass with the customer.

No
INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation. A7 CHECK THE VOLTAGE SUPPLY TO THE OVERHEAD CONSOLE
  • Key in OFF position.
  • Disconnect: Overhead Console C930.
  • Key in ON position.
  • Measure the voltage between the overhead console C930-1, circuit 964 (DB/LG), harness side and ground.
  • Is the voltage greater than 10 volts?
Yes
TURN the key to the OFF position. GO to A9 .

No
VERIFY the CJB fuse 15 (7.5A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. A8 CHECK THE DIMMING CIRCUIT
  • Key in OFF position.
  • Disconnect: Overhead Console C930.
  • Turn the headlamp switch to the parking lamps ON position.
  • Measure the voltage between the overhead console C930-4, circuit 484 (OG/BK), harness side and ground while rotating the instrument panel dimmer switch.
  • Does the voltage vary between 0 and 10 volts?
Yes
GO to A9 .

No
REFER to Section 413-00 for further diagnosis of the instrument cluster and panel illumination. A9 CHECK CIRCUIT 676 (PK/OG) FOR OPEN
  • Measure the resistance between the overhead console C930-2, circuit 676 (PK/OG), harness side and ground.
  • Is the resistance less than 5 ohms?
Yes
INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

Nov 30, 2017 | Mercury Grand Marquis Cars & Trucks

1 Answer

WHERE IS THE REMOTE COMPASS MODULE ON A 2008 JEEP COMMANDER


wow no symptoms stated just the boring where is it...
but great question, names car and year, clearly
we've posted the full fsm online here 100s of times.
here we go again.
down load it, then type , (after opening it)
control F, the type compass.
i wonder if a compass car has compass , omg.
i have 2010 and have same book.
did you scan the PCM yet, i bet not.
and its guess what, telling why it fails right now.
see page 8M-6 in book FSM.
the dtc shows car needs degaussing,, now.... see?
and if that error happens the compass goes blank, RTM?

8m-20
calibration, RTM
replacing first is "overthetop", why go there.
first are scans then tests.
or needs just a degaussing... (a tool)
page 27
"NOTE: In addition to the Universal Transmitter
operation the Electronic Overhead Module (EOM)
is responsible for some of the compass functions.
Anytime the EOM is replaced the compass variance
value must be set, (Refer to 8 - ELECTRICAL/
OVERHEAD CONSOLE/ELECTRONIC VEHICLE
INFO CENTER - STANDARD PROCEDURE - COMPASS
VARIATION ADJUSTMENT)."
not only that the PCM can lose commmications with this OEM.
so not scanning all modern cars, is a road to doom.
why skip scanning the car first and checking fuses.?????

scan first
ask questions 2nd.
my motto.... and WIN

Dec 31, 2015 | 2008 Jeep Commander 5.7

1 Answer

The overhead compass/temp gauge is not working. how can I fix it? I have a 2002 ford expedition sport trac. thanks


If the overhead lights are working but the console is not then it is a bad console. I offer a repair service in which I replace all of the faulty electronic components, and it includes a lifetime warranty. I have a bunch of tech info there; how to remove the console, etc. Check it out and drop me a note if you have any questions, thanks! www.autoclockrepair.com

Feb 22, 2011 | 2001 Ford Explorer Sport Trac

1 Answer

Light for odometer and compass does not work 2006 f-150


If the overhead lights are working but the console is not then it is a bad console. I offer a repair service in which I replace all of the faulty electronic components, and it includes a lifetime warranty. I have a bunch of tech info there; how to remove the console, etc. Check it out and drop me a note if you have any questions, thanks! www.autoclockrepair.com

Jan 09, 2011 | 2006 Ford F-150

1 Answer

The overhead console compass, and outside temperature gauge's light either went out, or it isn't working anymore. How do I fix it?


This is a very common problem with many of the mid 2000 Ford truck and SUV overhead consoles. The console is very prone to internal failure. If the dome lights work but the compass unit does not then it is a faulty computer unit. I offer a reasonable repair service with a lifetime guarantee, check it out: www.autoclockrepair.com
There is a bunch of useful info there. Drop me an email if you have questions, thanks!

Dec 18, 2010 | 1998 Ford Explorer

1 Answer

My electronic compass/temperature in the overhead console quit working. I was wondering if it could be a bulb or a fuse or if it was something else


This is a very common problem with many of the mid 2000 Ford truck and SUV overhead consoles. The console is very prone to internal failure. I offer a reasonable repair service with a lifetime guarantee, check it out: www.autoclockrepair.com
There is a bunch of useful info there. Drop me an email if you have questions, thanks!

Aug 03, 2010 | 1998 Ford Explorer

2 Answers

Readout in overhead console not working


This is a very common problem with many of the mid 2000 Ford truck and SUV overhead consoles. The console is very prone to internal failure. If the dome lights work but the compass unit does not then it is a faulty computer unit. I offer a reasonable repair service with a lifetime guarantee, check it out: www.autoclockrepair.com
There is a bunch of useful info there. Drop me an email if you have questions, thanks!

May 19, 2010 | 2002 Ford F250 Super Duty SuperCab

1 Answer

Display - outside temperature and compass


The overhead console is quite prone to internal failure. Dim, intermittent, or dead displays are a common symptom of an internal failure. We offer a reasonable repair service with a lifetime guarantee. Check it out: www.autoclockrepair.com

Jan 23, 2010 | 2002 Ford Expedition

1 Answer

2000 ford explorer overhead console temperature and compass ded


The overhead console is quite prone to internal failure. Dim, intermittent, or dead displays are a common symptom of an internal failure. We offer a reasonable repair service with a lifetime guarantee. Check it out: www.autoclockrepair.com

Jan 29, 2009 | 2000 Ford Explorer

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