1991 Lexus LS 400 Logo
Anonymous Posted on Jun 01, 2011

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

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This could be a problem with your starter -- if you know a bit about engines try tapping the starter with a wrench while someone turns the key (not too hard so you don't damage it if this is not the problem). If your starter motor has a "dead spot" tapping it can get it to free itself up and might help. If this DOES help, please consider changing your starter so you don't have to keep going through this problem. If tapping the starter does not help, it might just be dead altogether. If you are doing your own work, try replacing it and hopefully that should help. If you are not going to do your own work on the car, a mechanic should be able to give you a proper diagnosis and repair the issue without too much hassle.

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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

  • Anonymous Jul 11, 2011

    I had such a problem and I thought it was a bad starter. Paid for taking it to a service centre and it turned out to be a positive wire connecting plate. There are 2 wires coming on to a positive pole of the battery. Those 2 wires are bolted together. All you have to do is clean the plates that are bolted together with a metal brush. Worked 4 me. Starts as new.

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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.
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I have '91 lexus 400 im only getting a clicking

More than likely the battery needs to be charged or replaced. If the battery is over five years old this is a strong possibility that it is bad. AAA will come to your location and test your battery, and charging system for free, if you are a member. They will also replace the battery at your location at a costs. I recommend that you become a member of AAA, as one towing, or service call more than pays for the annual membership fee.
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The car was running fine one day then the next day it would not start. We tried jumping it thinking the battery might be dead and it still would niot start. The car has power until we take the jumper...

Sounds like you have a toasted battery or alternator. Have you performed a load test on the battery? Have you tried to charge the battery? First remove the battery and charge it externally from the vehicle. If the battery won't hold a charge, or won't hold a charge of 12 volts, replace it. Once you have the vehicle started, test the operation of the alternator. It should be putting out at least 13 volts back to the battery to keep it charged - if it is putting less than 13 volts or more than 16 volts, replace the alternator.
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My alternator won'charge and it and the battery

batteries will show 12 v and still not have enough amps to start the vehicle, clean all the connection points on the battery , and charge it fully, start the vehicle and check again for voltage at the battery posts, you should have a reading of 13.5 to 14.5 volts, if not, yes you have a alternator malfunction,
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I try to start the vehicle (2001 Suburban) and rapid clicking sound is what I hear. Just parked it monday and tuesday wouldn't start. Battery operates all systems fine and doesn't seem weak - but...

rapid clicking usually indicates a weak battery. There may be enough power to turn on the accessories but the starter requires much more power to get it to turn over.

You can check the battery connections for corrosion and clean or tighten as necessary.

You can also use a volt meter on the battery. you should see 12.5 volts with everything turned off. When you try to start it should not drop below 12 volts. if it drops below ten volts replace the battery.

you can also try jump starting the vehicle. if it starts replace the battery.

One last thing you can do is pull the battery and bring it to just about any parts store and they will test it typically for no charge. Some shops will also do this for no charge.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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Car wont start

have you checked all the grounds and did you replace the starter?
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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.
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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
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