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Question

HELLO, GARY HERE, I HAVE A 1994 LS 400AND IM SURE YOU KNOW ABOUT THE DASH LIGHTS FLICKERINGANDGOINGOFF AND ONWITHTHISMODEL , I HAVE A FREINDWHO HAD THE SAME PROBLEM WITH HIS AND HE WAS ABLE TO TAKE IT TO HAVE IT REPAIRED, THEY SAID IT WASA FUSEOR SOMTHING THAT NEEDED TO BE REPLACED ,CAN YOU PLEASE TELL ME HOW TO FIX MINEMYSELFASIDONT HAVE THE$$$TOTAKE MY CAR IN TO HAVE IT DONE,HOPEFULLYYOU CAN HELP ME, IF CALLING IS BETTER FOR YOU PLEASE FEEL FREE TO DO SO, THANKYOU AGAIN,GARY

Submitted: 265 days and 14 hours ago.
Category: Lexus
Value: $30
Status: CLOSED
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Posted by Peter 265 days and 14 hours ago.

Info Request

Hello and thank you for using just answer.

Yes this is a common issue on this year range LS.

Are you referring to the red indicators for the gauges flickering or the backlighting on the display flickering?

265 days and 14 hours ago.

Reply

HELLO PETER AND THANKS FOR BEING SO FAST IN RESPONDING , AND NO WHAT IM REFERING TO IS THE WHOLE DASH PANEL , WHEN I FIRST START THE CAR IN THE MORNING THE DASH IS WORKING FINE THEN USUALLY ABOUT 10 MIN LATER THE DASH WILL FLICKER FOR A FEW MIN THEN IT WILL GO COMPLETLEY DARK AND I CAN SEE NOTHING , THEN USUALLY AFTER ABOUT 30 OR 45 MIN IT WILL COME BACK ON AGAIN AND USUALLY STAYS ON TILL I TURN THE CAR OFF

Posted by Peter 265 days and 14 hours ago.

Info Request

Thank you for the reply.

I need 1 more clarification here now.....when you say "the whole dash panel" do you just mean the gauge area behind the steering wheel or is this the radio/climate control/door switches/shafter/etc.....lighting?

265 days and 14 hours ago.

Reply

BOTH WILL GO BLACK BUT USALLY IT IS ONLY BEHIND THE STEERING WHEEL , IT JUST DEPENDS ON ITS MOOD

265 days and 13 hours ago.

Reply

IM SORRY NOT TO HAVE AN EXACT ANSWER TO YOUR QUESTION BUT THAT REALLY HOW IT HAPPENS ,

Posted by Peter 265 days and 13 hours ago.

Info Request

Thank you for your replies, sorry for so many questions but I like to give acurate answers and information.

Does this seem to have gotten worse with time or just a steady issue?

Does temperature seem to hav a contributing factor in this issue?

If you ball your fist and smack the dash above the cluster will it alter or flicker the lighting if the condition is hapening?

265 days and 13 hours ago.

Reply

ITS COOL , IM OK WITH THE QUESTIONS , NO IT DOSNT SEEM TO BE GETTING WORSE WITH TIME BUT I DO THINK IT SEEMS TO ACT UP MORE IN THE WINTER TIME AND NO HITTING THE DASH DOSNT MAKE ANY DIFFERENCE , I ALREADY TRIED THAT TOO

Accepted Answer

Thank you for the reply.

I thought you might state exactly that.

this is a very common concern on this specific year range LS400. What happens is over time the printed circuit board inside the instrument cluster develops slight cracks that cannot be detected by the naked eye....as temperature rises/falls the circuit board expands/contracts and the electrical connections have a tendancy to open up on the board, a a result the cluster and lighting to the dimmer circuit is cut off. Typically (as you stated) this is worse and more noticibel when the car is in colder climate but can also be noticed more also when it's extremely hot inside the car.

Unfornutely there is no "cheap" solution or fix on this one. To remedy and resolve this issue the printed circuit board within the cluster OR the entire cluster will need to be replaced.

As far as repair options I advise against used/salvaged parts as this si a common issue and too many of my customers have purchased used parts that had the same issue and symptoms and end up purchasing a new component.

Note also that the circuit board should only be serviced by a technician familiar with this setup as it is basically a small computer and very sensitive to procedures.

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Expert: Peter
Pos. Feedback: 99.7 %
Accepts: 
Answered: 3/2/2009

Former Lexus Master technician

Master Certified with lexus, 6 years experience

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