Question about 1990 Lexus LS 400

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1990 lexus ls 400 security system went off now vehicle will not start. keys open door, turn alarm off but starter will not engage. had problem 2 months ago changed car battery. vehicle started, but the same thing happen again the doors was not locked just open the door and alarm went off and now car wont start.I chandeg the lock mecahnism in Jan 2010 car worked fine now problem with the alarm system. do anyone have a solution to this problem.

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Okay you may want to check to see if the sensor on door lock cylinder hasn't fallen off from the lock itself. Pull of the door panels and check the wires at the door lock cylinder. Hope this helps.

Posted on Mar 25, 2010

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My problem is i just recently bought this 1990 Lexus LS400 andeverything works fine but randomly the alarm will start going off wheni open the trunk or doors then i put the key in the ignition and itwill...


yer right,,,its a dam lexus??? there nothing but problems when they go wrong,,, not that they go wrong often, but when they do??????
i realy cant think of a way you could do what you wont to do,,,,, but i can think of a way to put it right, take it into the lexus dealer they will fix the alarm for you,,,only one thing that springs to mind is when did you last change the kye fob batterys?????
however when you do change them do it very very fast,, or you lose the coad for the alarm???
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