Question about 1991 Lexus LS 400

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My battery wont start my lexus ls 400

I changed the altenator and put a old battery in my car it worked for a day but now when i go out to start some of the lights will come on then no crank... i have to jump the get going then im fine. Every acouple of hours i go out to start the car. If the car sits for more that like 7 hours then i have to jump again. Can i put the wrong battery into the car or is there a certain battery i need? please help

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  • Lexus Master
  • 4,048 Answers

Original battery was/is lexus
ES250.
Group 35 Battery
Voltage: 12
CCA: 520
CA: 650
RC: 80 Min.
Length: 9.50"
Width: 6.75"
Height Over Terminals: 8.62" Terminals: SAE Auto Post
Chemistry: Maintenance Free - Flooded Lead Acid
Batteries don't last long 3 years at most, an old battery will not hold charge over time as the cell become clogged, this is the info of the 1991 battery that was originally fitted.

Posted on Jul 28, 2017

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  • Lexus Master
  • 15,575 Answers

More then likely your vehicle has a parasitic drain on the battery . A control module may not be powering down or something is on in the vehicle. Testing the electrical system like in this video is the way to find out .
The BEST Way TO Perform Parasitic Draw Test

Posted on Jul 28, 2017

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6 Suggested Answers

6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: all dash warning lights came

Hatterasnc,

You're alternator has gone bad and the vehicle was running on battery power. The "clicking" sound is your now dead battery that does not have enough power to turn over the starter. You might also want to check your power steering pump for leak. This is a know problem with early LS400s and will most likey be the cause of the alternator failure. I just dropped $1050.00 to fix the very same promblems you have.

Posted on Jul 21, 2008

  • 1 Answer

SOURCE: 1994 lexus ls 400 problem with dash board light

Try rotating the ignition switch slightly after you turn it to on and see if the lights come on...had the same problem and changed the switch fixed the problem...

Posted on Feb 14, 2009

mkv0525
  • 358 Answers

SOURCE: My 1993 Lexus LS 400 won't start.

seperate problems. you starter is under intake manifold and is most likly the problem and the dash lights go bad on older lexus ls400's.would have to be replaced.

Posted on May 21, 2009

mecanica03
  • 918 Answers

SOURCE: 1993 lexus LS 400 speedometer works sometimes

the plastic gear on speed sensor is broken , replace , this is on transm. rear case

Posted on Jun 18, 2009

GARYca
  • 672 Answers

SOURCE: My lexus ES 300 (97) wont start. When I tried to

your battery is dead!! Even if jumped, if the battery is dead celled it will not have sufficient power to crank. Dead celled batteries will hold a charge momentarily then slowly die again. I recommend temporarily swapping a battery from another vehicle to try and start your ES300. This is to make sure it isnt the starter or alternator thats the problem. To test the alternator, use a voltmeter at the battery terminals (w/car started and running) to check voltage should be (13.5-14.5 volts). If you do not have a voltmeter,(old school way) simply start the car, while engine running pull the positive terminal off the battery(make sure NOT to ground the positive terminal). If the vehicle dies, possible alternator or alt circuit failure. Bring it to autozone or advance auto to test for free. Hopefully this helps...please rate...thanks

Posted on Aug 08, 2009

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Looks like it needs adaptation/relearning.

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I would say change the alternator out. Start with the simplest and cheapest factor first. Without the alternator keeping the engine running its hard to put it any gear.

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is your wires on the alternator good and tight? try there good luck.... wait!!!! why did you replace them? have you had them tested? it could just be simply your starter. if so go get your money back

Aug 27, 2010 | 1992 Lexus Sc 400

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1990 Lexus LS400, Runs on a 4, 6, 8 system. Ran in 4, but would not change to 6, or 8. Replaced computer, engine did not fire. Put old computer back in and it still wont start. any suggestions?


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Apr 18, 2010 | 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...


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.

Mar 25, 2010 | 1990 Lexus LS 400

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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???
then it wont go at all,,, its a lexus!!! yuck!

Nov 05, 2009 | 1990 Lexus LS 400

1 Answer

Alternator


well Jennifer there is a quick way to do this start the engine lift the hood and remove the positive battery cable if the engine shut's off your altenators regulator is bad. Please note that is how I have always checked them. some mechanics believe that there is a potential for a battery to explode by doing this, however i never had this happen in 25 years of being a mechanic. you should still use caution when working on a vehicle . if the vehicle doesn't shut off then your battery is probabl;y no good. another altenative is take the vehicle to an auto parts store like Oreilly's and they will test the battery and altenator for you this is free of charge. please rate this thanks

Oct 02, 2008 | 1994 Lexus LS 400

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