LS 400 2000, Electrical and Starting Problems
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Driver School Candidate
Joined: Jan 2013
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From: ia
LS 400 2000, Electrical and Starting Problems
I have a LS 400 2000. Going well for last 13 years until last month. Starting problems. Dealer changed battery. Did not use for 3 days and car did not start. This time they changed the alternator. OK for 2 weeks. Again did not use for 4 days and car did not start. They said maybe an electrical drain somewhere they cannot figure out. All fuses are good. An independent person verified that the battery and alternator are good. By the way, they also changed a terminal on the battery.
Also the electricals on the driver side door do not work such as driver side controls for other door locks, other door glass up/down, side view mirror controls and the alarm. This happened since the battery went down the first time and I had to jump start the car. Dealer says these are unrelated. In any case they feel that there is an electrical drain somewhere and it will cost $ 1500 to diagnose. Not sure if it is worth it, because if I start the car once a day, then it is fine the next day.
Regarding the electrical issue in the door, last week, suddently all of these electrical issues were gone, and I thought it was well and good. Again it seemed to not work. This has happened 4-5 times and I have just given up. Can anone make any suggestions. Thanks very much !
Also the electricals on the driver side door do not work such as driver side controls for other door locks, other door glass up/down, side view mirror controls and the alarm. This happened since the battery went down the first time and I had to jump start the car. Dealer says these are unrelated. In any case they feel that there is an electrical drain somewhere and it will cost $ 1500 to diagnose. Not sure if it is worth it, because if I start the car once a day, then it is fine the next day.
Regarding the electrical issue in the door, last week, suddently all of these electrical issues were gone, and I thought it was well and good. Again it seemed to not work. This has happened 4-5 times and I have just given up. Can anone make any suggestions. Thanks very much !
Lexus Champion
Joined: Dec 2011
Posts: 4,078
Likes: 87
From: Birmingham, AL
when you say things like "did not use for 4 days and car did not start" do you mean that battery has gone dead, or you crank it fine but it does not start?
have you measured the battery voltage with car off after you have been driving a while, and also could you measure the voltage running at idle across the battery?
have you measured the battery voltage with car off after you have been driving a while, and also could you measure the voltage running at idle across the battery?
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Joined: Aug 2012
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From: IL
In this case you could attach a trickle to the battery or pop the connectors off the terminals when you are not going to use the car for a few days - just a workaround until you find the cause of the battery drain.
Thread Starter
Driver School Candidate
Joined: Jan 2013
Posts: 2
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From: ia
Reply
Thanks for your reply,
The car was not used for 4 days...........then the battery was down and required a jump start. Yes the battery was tested at Lexus Dealer. They said the new battery and the new alternator they installed was fine. Another new development. The electrical switches on the driver side work every now and then. To me it seems to be related to the alarm being turned on and off. When I can open the car with the key chain alarm, then the electricals work. When I cannot open the car with the key chain alarm, and I have to use the key, then the electricals do not work. Any suggestions. Thanks
The car was not used for 4 days...........then the battery was down and required a jump start. Yes the battery was tested at Lexus Dealer. They said the new battery and the new alternator they installed was fine. Another new development. The electrical switches on the driver side work every now and then. To me it seems to be related to the alarm being turned on and off. When I can open the car with the key chain alarm, then the electricals work. When I cannot open the car with the key chain alarm, and I have to use the key, then the electricals do not work. Any suggestions. Thanks
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