Question about 2003 Mercury Mountaineer

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Fog lights dont work and like to know my keyless entry code

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  • Mercury Master
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Lets do the easier question first. Have you checked the fuse for the fog lamps? if not the fuse for it is located in the power distribution box located in the engine compartment (see picture below). The fuse for the fog lamps is in the number 44 position and is a 15 amp fuse (see other picture below) now as far as your keyless entry code, this will be tricky but I will do my best to explain how to find it. I'll do my best or it's a 50 dollar trip to the dealer for you. Here i go. The keyless entry code is located on the computer module. The best way to get to the computer module is look behind the right rear panel in the "truck" space. First pull off the right rear seat belt panel then pull back the lower panel. You will see a green plug and the computer module is right below it. There should be a sticker on it with your five digit code. Everything should just snap back together when putting everything back. I hope you understood that as I'm not the best at explaining things. I hope this helps and good luck. If you have any other questions about your vehicle you can email me at csautomotivecars@att.net and I will do my best to help. Here's your pictures:


fog lights dont work and - clifford224_126.gifclifford224_127.gif

Posted on Apr 10, 2011

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I have a 2002 ford f150 supercrew lariat, my power door lock on all 4 doors dont work and neither switch works, theres is no clicking sound or anything, but the lights on the switch light up, also the...


You can't figure out thing's without knowing how there work , what controls them . In this case a control module .
Principles of Operation

Power Door Locks
The central security module controls the power door lock and keyless entry system. The lock and unlock operation is carried out by supplying ground to the central security module from the door lock control switch. The normal path of the actuators is to ground through the central security module. The door lock control switch will lock and unlock all doors by grounding the appropriate circuit to the central security module. The central security module then supplies power to the appropriate common actuator circuit to lock or unlock all doors.
Plus we don't guess , we test the electrical circuits with a DVOM - digital multimeter or a test light . We use a wiring diagram so we know which part of the circuits to test .

Keyless Entry
The remote transmitter sends a frequency that is received by the central security module internal antenna. Depending on the frequency received, the central security module will lock all doors or unlock the driver door. If the unlock frequency is received again within five seconds of the first unlock, the central security module will unlock all doors.
If the frequency received is for the panic button, the central security module will cycle ground to the park lamp and horn. The park lamps and horn will continue to cycle until the panic button is pressed again or the ignition switch is turned to the RUN position or 2.75 minutes elapse.
Plus we hook up a scan tool that can read codes from the control module , not a code reader for engine codes , won't work ! Need a professional scan tool .Do you know what DTC'S are ? Diagnostic trouble codes !
Central Security Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action to Take B1309 Power Door Lock Circuit Short to Ground Central Security Module Go To Pinpoint Test C . B1341 Power Door Unlock Circuit Short to Ground Central Security Module Go To Pinpoint Test C . B1485 Brake Pedal Input Circuit Short to Battery Central Security Module Go To Pinpoint Test E . B1526 Keyless Entry Circuit Short to Ground Central Security Module Go To Pinpoint Test F . B1629 PRNDL Reverse Input Short to Battery Central Security Module Go To Pinpoint Test E . B2276 Less Than Two Transmitters Programmed Central Security Module Go To Pinpoint Test I . B2425 Remote Keyless Entry Out of Synchronization Central Security Module Go To Pinpoint Test I . - All Other DTCs Central Security Module REFER to Section 419-10 .
  • All door locks are inoperative
  • Battery junction box (BJB) fuse(s):
    • 8 (15A).
    • 115 (20A) (Super Crew).
  • Circuitry.
  • Central security module.
  • Go To Pinpoint Test C .

Seams you lack the knowledge and test equipment to tackle this type of repair . Your best bet mite be to have a qualified repair shop check it out.
So, without testing i couldn't even begin to suggest what mite be wrong . I would only be guessing , as would anyone on here would.

Jul 30, 2017 | Cars & Trucks

1 Answer

I dont know where to find the unlock code for the keyless entry on my 1993 mercury villager?


The only thing you can do is see if the dealer can get the code using the vin, otherwise you will need to replace the module for the keyless entry, i'm not sure if this year can be reprogramed.

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Keyless entry


I bought a Ford and luckily the owner knew the code. Ford told me I would have to bring it to them if I didn't have code.

Mar 17, 2010 | 1994 Ford Thunderbird

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Keyless locks dont work, Turn signals dont work,


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May 25, 2009 | 1995 Ford Mustang

1 Answer

Keyless entry for a 1999 dont work maybe its a fuse, dont no need help.


Press each button one at a time to make sure the pad lights up each time. If it does not you have a bad keypad.

Did you have your own personal code programmed into the key-less entry? If the battery went dead or was disconnected it would have reverted back to the original.

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1 Answer

Key Pad Entry does not work


does the key pad light when you press a button at night? If yes, the fuse is ok.
Do you have the plastic card with the permanent code in your owner manual packet? If yes, tryit.
report back.

Keyless Entry The keyless entry keypad is hardwired to the GEM. The GEM interprets the inputs from the keyless entry keypad and then controls the associated operation. The keyless entry keypad will be illuminated for five seconds when any button is pressed. Additionally, it will request the illuminated entry feature to turn the courtesy lamps on. If a lock all doors code is entered, the illumination will turn off, as well as request the illuminated entry feature to turn off the courtesy lamps. When pressed, the keyless entry keypad supplies the ground signal to the GEM or the GEM receives a signal from the keyless entry remote transmitter. Then the GEM outputs a ground signal to the appropriate lock or unlock relay which supplies the power to the actuator to lock or unlocks all doors, including the luggage compartment. The keyless entry remote transmitter also unlocks the liftgate or activates the panic alarm by sending a signal to the GEM.
--------------------------------------------------------------- Visual Inspection Chart Mechanical Electrical
  • Keyless entry keypad
  • Keyless entry remote transmitter
  • Central junction box (CJB) Fuse F222 (20A)
  • Circuitry
  • Generic electronic module (GEM)
------------------------------------------------------------------------
  • No communication with generic electronic module (GEM)
  • Generic electronic module.
  • Circuitry.
  • REFER to Section 419-10 .
------------------------------------------------------------------------------------

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Intermittent flashing lights when vehicle is turned off


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Oct 28, 2008 | 1993 Ford Thunderbird

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