Question about 1991 Lexus LS 400

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I have a 1991 Lexus 400 with a battery problem every time I would jump start the car would restart but then it goes off. Can anyone give me a good suggestion what's really wrong with it. Thank you very much

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Sounds like you have a bad altanator change it should fix it the way to check it would be with avolt meter or a load tester part store will check it for free

Posted on Aug 05, 2010

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Posted on Jan 02, 2017

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Where is the starter soenoid located on a 1991 Lexus LS400?


If the solenoid is clicking when you turn the key its very unlikely to be a relay fault, the relay controls the feed to the exciter wire which must be working for the solenoid to be clicking. If you haven't ruled out the battery completely do so by attaching jump leads, if that makes no difference you ideally need to check for a volt drop between engine and battery earth terminal and also main starter feed to battery positive, (the latter can be a problem with difficult to access starter motors tho.) if all wiring is ok its most likely the motor itself, if you can get to it give it a tap with something and see if it makes any difference. If it starts after a tap then its most likely the starter motor.

Nov 01, 2017 | 1991 Lexus LS 400

2 Answers

My battery wont start my lexus ls 400


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

Jul 28, 2017 | 1991 Lexus LS 400

2 Answers

1991 Lexus 400 - engine doesn't start - battery seems charged - 12.3 volts - makes clicking sound only - doesn't turn over at all.


Is it one click or multiple clicks. If it's multiple clicks, it sounds like a dead battery. Voltage isn't always an indicator of a good battery, you need to have enough cranking amps to be able to start an engine also. If you have dash lights and it only clicks once, you could have a bad starter. An easy way to check this is to try and jump start the vehicle. If it starts up with a jump start, you need a new battery. If it still doesn't start up and it just clicks, you probably need a new starter.

Good Luck!
~Brandon

Jun 01, 2011 | 1991 Lexus LS 400

1 Answer

Put new starter in lexus put back to gether now turn key on and dose nothing


Inspect the wiring. Make sure that the terminals are cleaned including the ground. Try to jump start it by connecting it to the battery of another car. If it runs, check your battery and your alternator as well if it is charging the battery correctly. If it does not, inspect the starter relay.

Apr 18, 2011 | 1991 Lexus LS 400

1 Answer

The battery went dead, had to jump start the car. The radio stays off & a blank screen. how do I restart the radio Thanks


GET A GOOD FUSE TESTER, TEST EACH FUSE. THERE ARE 2 FUSEBOXES. ONE UNDER THE HOOD & ONE IN THE DASH. ALL FUSES CAN BE TESTED WHILE STILL IN PLACE. THERE ARE TEST POINTS FACING OUT. TURN ON IGNITION SWITCH FOR THIS TEST. POWER ON 1 SIDE, BAD FUSE POWER ON BOTH SIDES, GOOD FUSE. POWER ON NEITHER SIDE, SPARE FUSE.

Jan 10, 2011 | 1991 Lexus LS 400

1 Answer

I have a 1991 Lexus 400. It cranks but won't start.If it does start it stalls or runs perfectly for days.Any thoughts??


Check battery cables. MAke sure they are on tight, and not corroded. Check ground wires inside the engine compartment, and even inside the car, for tightness. Try a good fuel injector cleaner, like Lucas.

Aug 27, 2009 | 1991 Lexus LS 400

1 Answer

Vehicle Vibration


when was the last tune-up?

Mar 23, 2009 | 1991 Lexus LS 400

2 Answers

Radio locked 1991 lexus ls400


do you know how to reset radio code lexus ls 400 /1991

Aug 14, 2008 | 1991 Lexus LS 400

1 Answer

My 1991 lexus ls400


The most likely problem is your alternator, the alternator charges your battery while the engine is running, if the alternator is bad you have a dead battery, but you can check with a volt meter to ensure that is your problem. Start your car (use a battery charger or jump to start it if you need to) and put your meter on the battery post's. If your reading 13volts or so your alternator is working and maintaing voltage, however if your reading starts dropping to 10 or less(may take a few moments to drop) then it's probably your alternator. You can also check your battery's voltage before starting your vechile, if the voltage increases after you start the vechile then it seem to be charging. Alternators can be repalced somewhat easily, it's only two boltsm however you do have to remove the fan belt, and re-route after installing the new alternator. If you have some expirence working on cars you can do this yourself in your driveway.
Good luck

Here's a start for you, hope this helps

Jul 18, 2008 | 1991 Lexus LS 400

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