Question about 1994 Buick LeSabre

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Security Light Flashing

Yes security light is flashing,but i have done no repairs except got new battery and a spare key made because a guy put his diagnostic tool on it and it said, pass key error or data key error something like that,but it still does the same thing

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You will have to you the master key to deactivate the security system and reset the system. anytime you disconnect the battery, the security system set a code. what year is this car?

Posted on Dec 31, 2008

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Posted on Jan 02, 2017

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Fuse location for interior lighting 2007 f150 fxt4x4 also is there 2 dash lights it doesn't seem to be as bright as it used to


dash lights it doesn't seem to be as bright as it used to ???? Dimmer switch on full bright ? Visual Inspection Chart Electrical
  • Bulbs
  • Central junction box (CJB) fuse 24 (15A)
  • Circuitry
  • Vehicle security module (if equipped with RKE)
  • Instrument cluster
  • Door ajar switches

Interior Lighting The interior lamp system is separated into 2 subsystems: the interior lamp subsystem and the on-demand lamp subsystem. The dome light and front map light on-demand lamps are also part of the interior lamp subsystem.
An on-demand interior lamp will only illuminate when its specific switch is activated. On-demand lamps consist of the front map light and the dome light.
The instrument cluster illuminates the interior lamps when any door is ajar, when an unlock signal is received by the vehicle security module (if equipped with remote keyless entry (RKE) or the dimmer switch is rotated to the ON position. The instrument cluster will turn off the interior lamps when all doors are closed, the vehicle security module (if equipped with RKE) receives a lock signal, 25 seconds have elapsed since the illuminated entry feature was activated, or the dimmer switch is rotated to the OFF position.
The vehicle is also equipped with a battery saver feature. The battery saver feature provides automatic shutoff of the demand lamps, courtesy lamps, and the warning chimes after a specific period of time has elapsed in order to save battery power.

  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 cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN, ISO or UBP circuits fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for instrument cluster, refer to Section 413-01 .
    • No response/not equipped for vehicle security module, refer to Section 419-10 .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the instrument cluster.
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the vehicle security module.
  1. If the DTCs retrieved are related to the concern, go to the Instrument Cluster Diagnostic Trouble Code (DTC) Index or the Vehicle Security Module Diagnostic Trouble Code (DTC) Index.
  1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
  2. Symptom Chart Condition Possible Sources Action
    • The interior lamps are inoperative
    • Fuse
    • Circuitry
    • Instrument cluster
    • Dimmer control switch
    • Go To Pinpoint Test A .
    Pinpoint Test A: The Interior Lamps Are Inoperative
    Normal Operation On vehicles equipped with remote keyless entry (RKE), the door ajar switches are hardwired to the vehicle security module. The vehicle security module monitors the status of all door ajar switches, and when a door is opened, transmits a dome lamp ON signal to the instrument cluster through UART based protocol (UBP) circuit 1906 (PK), indicating a door has been opened. When the instrument cluster receives the dome lamp ON signal from the vehicle security module, the instrument cluster energizes the interior lamp circuits, which illuminates the interior lamps and, if equipped, the puddle lamps in the exterior mirrors.
    On vehicles without RKE, the door ajar switches are hardwired to the instrument cluster. When the driver or passenger door is opened, the instrument cluster receives a ground signal from the driver door ajar switch through circuit 344 (BK/YE), or from the passenger door ajar switch through circuit 345 (BK/PK), and the instrument cluster energizes the interior lamp circuits, causing the interior lamps to illuminate.
    The dimmer control switch can be used to turn the interior lamps ON or OFF when the doors are closed. The interior lamp defeat switch can be used to turn the interior lamps OFF when the doors are open.
      Possible Causes
    • Fuse
    • Circuit 53 (BK/LB) open or short to ground
    • Circuit 57 (BK) open
    • Circuit 402 (OG/LG) open
    • Circuit 1405 (LB/BK) short to ground
    • Circuit 3049 (BK/LG) open
    • Dimmer control switch
    • Instrument cluster
    PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE
  3. PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE Test Step Result / Action to Take A1 CHECK THE INTERIOR LAMP OPERATION AT THE DIMMER CONTROL SWITCH
    • Close all doors.
    • Operate the interior lamps with the instrument panel dimmer control switch.
    • Do any interior lamps illuminate?
    Yes
    For vehicles without RKE, REFER to Section 413-01 .

    For vehicles with RKE, REFER to Section 419-10 .

    No
    GO to A2 . A2 CHECK FOR INSTRUMENT CLUSTER OR VEHICLE SECURITY MODULE DIAGNOSTIC TROUBLE CODES (DTCs)
    • Key in ON position.
    • Carry out the instrument cluster On-Demand Self Test.
    • For vehicles equipped with remote keyless entry (RKE), carry out the vehicle security module On-Demand Self Test.
    • Were instrument cluster DTCs B2499 or B2659, or if equipped with RKE, vehicle security module DTC U1950 present?
    Yes
    For instrument cluster DTC B2499, GO to A5 .

    For instrument cluster DTC B2659, GO to A9 .

    If equipped with RKE and vehicle security module and DTC U1950 is present, REFER to Section 418-00 to diagnose the UBP network concern before attempting to diagnose the interior lighting concern.

    No
    GO to A3 . A3 CHECK CIRCUIT 3049 (BK/LG) FOR AN OPEN
    • Key in OFF position.
    • Disconnect: Instrument Cluster C220b.
    • Measure the voltage between the instrument cluster C220b-9, circuit 3049 (BK/LG), harness side and ground.
    • Is the voltage greater than 10 volts?
    Yes
    GO to A4 .

    No
    VERIFY the central junction box (CJB) fuse 21 (15A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. A4 CHECK INSTRUMENT CLUSTER CIRCUIT 57 (BK) FOR AN OPEN
    • Disconnect: Instrument Cluster C220a.
    • Measure the resistance between the instrument cluster C220a-17, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms?
    Yes
    GO to A5 .

    No
    REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. A5 CHECK CIRCUIT 53 (BK/LB) FOR AN OPEN
    • NOTE: If the fuse fails, repair circuit 53 (BK/LB) for a short to ground.
    • Connect a fused (15A) jumper wire between the instrument cluster C220b-9, circuit 3049 (BK/LG), harness side and the instrument cluster C220b-8, circuit 53 (BK/LB), harness side.
    • Do the interior lamps illuminate?
    Yes
    REMOVE the jumper wire. GO to A6 .

    No
    REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. A6 CHECK THE DIMMER CONTROL SWITCH OPERATION
    • Connect: Instrument Cluster C220a.
    • Disconnect: Dimmer Control Switch C205b.
    • Connect a fused (15A) jumper wire between the dimmer control switch C205b-4, circuit 57 (BK) and the dimmer control switch C205b-2, circuit 402 (OG/LG).
    • Do the interior lamps operate?
    Yes
    INSTALL a new dimmer control switch. REFER to Section 417-01 . TEST the system for normal operation.

    No
    GO to A7 . A7 CHECK CIRCUIT 402 (OG/LG) FOR AN OPEN
    • Disconnect: Instrument Cluster C220a.
    • Measure the resistance between the instrument cluster C220a-12, circuit 402 (OG/LG), harness side and the dimmer control switch C205b-2, circuit 402 (OG/LG), harness side.
    • Is the resistance less than 5 ohms?
    Yes
    GO to A8 .

    No
    REPAIR the circuit. TEST the system for normal operation. A8 CHECK DIMMER CONTROL SWITCH CIRCUIT 57 (BK) FOR AN OPEN
    • Measure the resistance between the dimmer control switch C205b-4, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms?
    Yes
    GO to A11 .

    No
    REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. A9 CHECK CIRCUIT 1405 (LB/BK) FOR A SHORT TO GROUND
    • Key in OFF position.
    • Disconnect: Instrument Cluster C220a.
    • Disconnect: Dimmer Control Switch C205b.
    • Measure the resistance between the instrument cluster C220a-11, circuit 1405 (LB/BK), harness side and ground.
    • Is the resistance greater than 10,000 ohms?
    Yes
    GO to A10 .

    No
    REPAIR the circuit. TEST the system for normal operation. A10 CHECK THE DIMMER CONTROL SWITCH
    • Carry out the dimmer control switch component test. Refer to Wiring Diagrams Cell 149 for schematic and connector information.
    • Is the dimmer control switch OK?
    Yes
    GO to A11 .

    No
    INSTALL a new dimmer control switch. TEST the system for normal operation. A11 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
    • Disconnect all instrument cluster connectors.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect all instrument cluster connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present?
    Yes
    INSTALL a new instrument cluster. REFER to Section 413-01 . TEST the system for normal operation.

    No
    The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation

Jul 19, 2017 | Cars & Trucks

1 Answer

2003 Jaguar X type It won't start or crank and light on center console stays flashes ,what can I do to start MY car


your security system might be on.

1. check battery.
2. using your key lock and unlock your drivers door couple of times and then try starting your car.
3.if no luck then try starting it with your spare key.
if starts with spare, then you need a new chip in your main key.
good luck.

Jul 08, 2017 | Jaguar X-Type Cars & Trucks

1 Answer

My '98 GMC Jimmy's security light flashes & I can't start my engine! I'm the owner & am using the original ignition key!


How many miles on the vehicle ? Thing's wear out , thousands of times of put the key in an turning it .

Have you tried to do a relearn ?

30 Minute Procedure
Ensure that the battery is fully charged.
Use a scan tool in order to clear the Passlock™ DTCs.
Turn the ignition switch from the OFF position to the CRANK position, and then to the RUN position.
The vehicle will start and then stall.
Leave the ignition ON until the security telltale turns OFF in 10 minutes.
Repeat Steps 3-5 for 2 more times (3 times total)
The Passlock™ controller will learn the new data on the next start attempt.
Use a scan tool in order to clear all DTCs.

Don't worry about the scan tool part , just do the relearn . If that doesn't work you will probably have to take it to a dealer .

DTC B2947 Security System Sensor Power CKT Low
DTC B2948 Security System Sensor Power CKT High
DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B3031 Security System Controller in Learn Mode
DTC B3033 Security System Indicates Tamper

If the relearn doesn't work one of these DTC'S - diagnostic trouble code's is stored .

Mar 08, 2017 | 1998 GMC Jimmy

2 Answers

The immobilizer light on my dash is flashing, and the vehicle will not start, can hear the fuel pump running when I turn the key, but no crank.


Most likely your key has failed. You should find and try your spare key if you still have it. If not, then you will require someone with a tool to scan immobilizer codes and verify if there is a fault in the immo system or if it simply is saying INVALID KEY. If its faulted, it will require repairs. If its invalid key, you can use your backup key, or have a new key programmed by a mechanic or locksmith with key programming tools

Nov 12, 2015 | 2001 Volvo V40

1 Answer

X300 steering wheel locked up. Is it the parking brake? Worked fine yesterday


sounds like a security system fault or the column lock motor has failed, try a battery reset ie, disconnect the battery for 10 mins then reconnect it, also make sure the battery is charged, is the security led. flashing? if so you need to get it on suitable diagnostic equipment.it may be the key transponder not recognising your key or the chip in the key faulty, try your spare key hope this helps.

May 17, 2015 | Cars & Trucks

11 Answers

Changed ignition switch now security light stays on and truck starts and kills


You need to relearn the passlock system (security). There are 2 ways. One is with a scanner, which most diy'er wont own an expensive one to do it this way, here is the manual way. Start the truck and let it run until it dies. The security light should then be flashing. Leave the key in the run position until the security light stops flashing (about 10-15mins). After the light stops flashing turn the key off. Try to start the truck again. It should do the same thing (run for a few seconds and then die with the security light flashing). Again wait for 10-15 mins for the light to stop flashing and then turn the key off and repeat the process one last time. That's a total of 3 times. Once you finish the process the 3rd time. Let the truck sit for a minute with the key off. It should now be programmed and start and run normally.

Jun 02, 2014 | 1999 Chevrolet Silverado 1500

2 Answers

2000 Cheverolet silverado truck will not start due to security light needing to overide. The truck drove fine until we stopped and parked it for a few minutes. Then it would not start at all. It does not...


yes, its in the security system. Get a repair manual as trying to explain how to remove the ignition cylinder is confusing. Remove key cylinder...clean real good with carb cleaner....clean the hounsing also. remove all evidence of grease. reinstall and check...if ths does not solve the problem, the key cylinder will have to be replaced. have a locksmith code a new cylinder to your key. install new cylinder and program. look up on net. Leave feedback for others to see if this helps...Thanks

Nov 08, 2009 | 2000 Chevrolet Silverado

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