Question about 2003 Chevrolet Impala

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Does your car have a remote car starter installed by any chance?

Posted on Aug 26, 2010


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2005 Ford E350 Van Door locks & dome lights are going on & off on there own

Do you know anything about automotive electronic's ? Control modules ?
Vehicle Security Module
The vehicle security module receives inputs from the following:
  • Door ajar switches
  • Keyless entry keypad
  • Ignition switch
  • Remote keyless entry (RKE) transmitter
The vehicle security module uses these inputs to control an output signal to the instrument cluster which controls the battery saver relay and interior lamp relay. The battery saver relay and the interior lamp relay are internal to the instrument cluster, and are not replaceable. There could be a faulty switch input to the I/C - insturment cluster , causing the vehicle security module to activate the lock's an light's .
Interior Lighting Systems
The instrument cluster grounds the battery saver relay and interior lamp relay coils when any door ajar switch is opened, or the interior lamp (headlamp) switch is closed. The interior lamp relay then supplies voltage to the interior lamp circuit. Vehicle speed must be less than 24 km/h (15 mph) for the instrument cluster to ground the interior lamp relay. The interior lamps remain illuminated for up to 25 seconds after all doors are closed unless the instrument cluster receives an input from any of the following:
  • voltage from the ignition switch.
  • a vehicle speed signal.
  • input from the keyless entry keypad through the vehicle security module.
  • input from the RKE transmitter unlock or panic switch through
  • the vehicle security module.
Do you know what DTC'S - diagnostic trouble codes are ?
Could have DTC'S stored in the following Modules
Instrument Cluster Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1320 Driver Door Ajar Circuit Open Instrument Cluster Go To Pinpoint Test C . B1328 Passenger Door Ajar Circuit Open Instrument Cluster Go To Pinpoint Test C . B1342 ECU is Defective Instrument Cluster CLEAR the DTCs. REPEAT the self test. If DTC B1342 is retrieved again, INSTALL a new instrument cluster. REFER to Section 413-01 . All Other DTCs - Instrument Cluster REFER to Section 419-10 .

Vehicle Security Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1322 Driver Door Ajar Circuit Short to Ground Vehicle Security Module Go To Pinpoint Test C . B1330 Passenger Door Ajar Circuit Short to Ground Vehicle Security Module Go To Pinpoint Test C . B1338 Door Ajar RR Circuit Short to Ground Vehicle Security Module Go To Pinpoint Test C . B1342 ECU is Defective Vehicle Security Module CLEAR the DTCs. REPEAT the self test. If DTC B1342 is retrieved again, INSTALL a new vehicle security module. REFER to Section 419-10 . B1574 Door Ajar LR Circuit Short to Ground Vehicle Security Module Go To Pinpoint Test C . All Other DTCs - Vehicle Security Module REFER to Section 419-10 .
Your best bet mite be to take to a qualified repair shop .

Sep 05, 2017 | Ford Cars & Trucks

2 Answers

What would make my 2000 deville not to start?

Your security system may be causing a problem? Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader.
Is there a security lamp on the dash that is staying on? There might be a relearn procedure you could try if it is a security system issue?

Feb 27, 2017 | 2000 Cadillac DeVille

1 Answer

My 94 grand Cherokee jeep runs smoothly until it warms up then runs rough and the security light comes on

that is called misfire, (security lamp is 2nd problem)
misfire is bad combustion.
rough driving only or at idle too?
and is the most complex of issues on any car, (engine related)
got tools? or just want a wild guess?
1: get a tune up this decade>?
(and 50 more)

Apr 09, 2015 | Jeep Cars & Trucks

1 Answer

How di I fixes a security code my. Car won't turn at all

did you check / replace the fob key battery

Mar 17, 2015 | 2004 Dodge Neon

1 Answer

2002 ford expedition interior lights are not on what fuse is it?

Courtesy Lamps - central junction box. fuse # F1.21 that goes to interior lamp relay in the instrument cluster and F.24 this fuse powers battery saver relay .
Interior Lighting The interior light system consists of the following:
  • front map lamp assembly
  • front door courtesy lamp
  • generic electronic module (GEM)
  • glove box lamp assembly
  • central security module
  • interior lamp switch
  • interior lamp relay
  • illuminated vanity mirrors (Navigator only)
  • reading lamp assembly
  • rear courtesy lamp
  • running board lamp
  • underhood lamp assembly
  • The generic electronic module (GEM) illuminates the interior lamps when an unlock signal is received from the remote anti-theft personality central security module. The illuminated entry feature will be canceled when any of the following conditions are met:
    • 25 seconds have elapsed since the illuminated entry feature was activated and the interior lamp control is not activated (door ajar or courtesy lamp switch on).
    • The GEM receives a request from the central security module (remote transmitter lock button pressed) and the interior lamp control is not activated.
    • The ignition is in the RUN or START position and the interior lamp control is not activated.
    The GEM will illuminate the interior lamps when any door is open or ajar. The interior lamps are; the dome lamp, the rear cargo lamp, the door courtesy lamp and the side rail lamps. The courtesy lamps will shut off when the doors are closed and the illuminated entry feature is not active or when the vehicle speed is greater than 5 mph (8 km/h). The interior lamps will not be reactivated until the vehicle speed is less than 3 mph (5 km/h) and a new door open warning lamp switch is received.
    The GEM controls the interior lamps illuminated entry function by activating the interior lamp relay.
  • You have an electronic control module and relays involved in the operation of these lights also !

  • What

    Jan 08, 2015 | 2002 Ford Expedition

    1 Answer

    Why does the brakes drag on occasion?

    Have changed the brake hoses? A weak or soft hose will collapse when you release the brakes. This will slow the caliper releasing.

    Jun 22, 2014 | 1991 Lincoln Town Car

    1 Answer

    Checked all 3 fuse boxs, fuses and lights bulbs they are good. problem is no low beams lights on both sides, only high beam and parking. any ideas? also already changed out the breaker (20-30) on the...

    When you turn on your head lamp do you notice that you also have rear tail lights that are lit up as well? I have noticed on some occasion, both front headlamp assemblies could possibly be blown at the same time. One of the most important tools for checking to see if you have power on the low and high beam circuit will be a automotive test lamp, you can purchase these at most auto parts stores.

    Jun 11, 2011 | 1996 Pontiac Grand Prix

    1 Answer

    Have a 93 cadillac fleetwood, changed key cilinder and computer, but pass key fault light still comes out and does not let engine turn on.

    The security system is keeping the engine from starting. In order to manually learn the security, you should try the following. With a fully charged battery, and all accesories, including headlamps, and dome lamp off, turn the key on, crank the engine for a second, then release the key. Leaving the ignition on for ten miniutes, the security light will shut off. turn the key off, back on, then repeat. This needs to be done 3 times, after 30 mins, try starting the engine. It should have relearned, and start up. Good

    Dec 10, 2010 | 1993 Cadillac Fleetwood

    1 Answer

    2003 chev suburban.battery went dead.replaced battery,now it wont crank and security light blinks

    I have ran into this problem many times. Insert the key, and turn it to run. After 10 minutes the security lamp should go out. Turn the key off, and then back to run and let it sit another 10 minutes until the security lamp goes out again. Now repeat this one more time for another 10 minutes until the lamp goes out again. This should be a total of 30 minutes so make sure your battery is fully charged when you start the procedure. After the third time and the lamp going out you should be able to restart the vehicle.

    Jan 17, 2010 | 2003 Chevrolet Suburban 1500

    1 Answer

    I am having a problem with my brake lights coming on. I can turn on the lights and the turm signals work. I have replaced the brake switch twice with new ones. I also replace the plug that plugs into the...

    If you have changed the brake lamp switch and it has made absolutely no difference on each occasion I would be checking the earthing connection to the rear lamp clusters.

    Oct 04, 2008 | Mercury Cougar Cars & Trucks

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