Question about 1990 Lexus LS 400

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Dash light lexus ls400

I have 5 icons that come on the dash one is batter,oil, radiator,parking brake,brake light, do I need a new alternator?

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Posted on Jan 02, 2017

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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

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SOURCE: '01 Lexus GS 300,My dash tail lights warning just

check you tail bulbs as you have a broken circuit

Posted on Jun 10, 2009

subytech1
  • 251 Answers

SOURCE: My 1991 Lexas LS400: All of the dash icons light up and radio goes on/off (at the same time) when applying the brake and/or while the `car has stopped. Had new battery checked, the battery is good.

I've seen this before, the problem ended up being the brake light bulb lead contacts touching each other on the dual filament bulbs allowing back feed voltage to travel through the park/dimmer switch circuit causing the lights to activate while pressing the brake pedal. I would pull all the brake light bulbs out and look at the back of each one, if you see nothing unusual, I would still replace them all only because it could be internal to the bulbs as well. Let me know if this fixes your problem.
I hope this info helps!~subyguru~

Posted on Jan 19, 2012

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My 1991 Lexas LS400: All of the dash icons light up and radio goes on/off (at the same time) when applying the brake and/or while the `car has stopped. Had new battery checked, the battery is good....


I've seen this before, the problem ended up being the brake light bulb lead contacts touching each other on the dual filament bulbs allowing back feed voltage to travel through the park/dimmer switch circuit causing the lights to activate while pressing the brake pedal. I would pull all the brake light bulbs out and look at the back of each one, if you see nothing unusual, I would still replace them all only because it could be internal to the bulbs as well. Let me know if this fixes your problem.
I hope this info helps!~subyguru~

Jan 19, 2012 | 1991 Lexus LS 400

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The dash trac light stays on and the radiator icon is on. What is the problem


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My (brake) light turns on in the dash and wont go off what can it be?...


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All dash warning lights came on while driving. oil light, brake light, coolant light, battery light. car continued to run. once home turned off and now wont start. warning lights still come on and car...


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.

Jul 21, 2008 | 1990 Lexus LS 400

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