Question about BMW Cars & Trucks

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My car wouldnt start, and thought it was the battery. when i took out the battery to replace it the car alarm went off. now it wont stop how do i disable it?

My 1991 bmw 525i, wouldnt start one morning.. when i turned the key it didnt do anything except turn on the lights in the dashboard and everything electrical worked except starting the car. i replaced the battery and the alarm started going off but it still wont start. when i disconnect the battery the alarm stops, but when i connect the battery again the alarm goes back on. how do i disable the alarm in order to find the solution to get my car to start?

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  • BMW Master
  • 803 Answers

Disconnect the battery, have the ignition key turned to the "on" position then reconnect the battery.

Posted on Feb 03, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

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SUL827
  • 93 Answers

SOURCE: My car alarm is blinking

You need to first look under the drivers side dash area near the hood release/fuse panel area and see if there is a valet switch. The switch will look like a little toggle or a push switch. After you locate it, turn the ignition switch to the on position(dont start it) and flick the valet to the opposite position it is in now. If done correctly in most cases the red system light will stay a constant instead of off or blinking indicating you are in valet mode. Next try to start the engine. If this doesnt work you need to remove the alarm system and repair the ignition switch wiring or replace the electrical portion of the ignition switch. The aftermarket alarm cuts into the ignition switch wires and bypasses the start circuit through the alarm module. When disarmed the alarm completes the circuit and allows the car to start. Good luck hope this helps and please rate this.

Posted on Nov 27, 2008

beauman
  • 60 Answers

SOURCE: My car alarm is blinking

you can try switching the key to the "on" position then open the hood and disconnect the negative terminal of the battery and reconnect after 2minutes. this will allow the alarm to be '"reset" and will recognize that you have the key for the vehicle.

Posted on Aug 16, 2008

  • 4 Answers

SOURCE: My car alarm is blinking

Your Central locking wire is short from any one door side. Please check it properly.

Posted on Nov 17, 2008

  • 14 Answers

SOURCE: Car alarm stopped working.. Car wont start

the jetta has a faulty alarm system from the factory i have been working on one in my shop. the alarm moddule is inside the dash behind the light switch and has a 10 pin connector and a 6 pin connector. this can be bypassed if you disconnect both connectors and jump the two large wire on the 6 pin connectors, these wires operate your starter. the car will start and run but your alarm will no longer be active. the door locks and everthing else will still work. the only issue i am having is the factory radio isn't working because it is controlled by the alarm. but worse case scenario i can use an aftermarket radio if need be.

Posted on Feb 28, 2009

  • 1 Answer

SOURCE: 1995 BMW 525i. Car will not start or turn over.

I had the same problem, after having the car towed to four Seasons, it was discovered that the electrical portion of the ignition switch was defective. Works like a charm. Part number 61 32 8 356 026 Hope this will help.

Posted on Nov 16, 2010

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