Question about 1993 Lexus Es 300

2 Answers

Battery cables switched

Autozone sold my son the wrong battery. He put it in the only way it would fit and attached the cables. He got a spark but it would not start. We took it back to the store and they replaced the battery with the correct one. Installed it and still nothing. A mechanic has been trying to figure out what is wrong. Now after 4 days and extensive tests he says the computer needs to be replaced. Is this an easy fix or should we have the mechanic do it? Should we only use new parts or is it okay to replace with a used computer? Or should we just scrap the car and put our money towards something else?

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  • Meg Gloyd
    Meg Gloyd Feb 10, 2014

    By the way, they have replaced the main fuse but there still is no fire.

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  • 56 Answers

2nd hand ecu is fine just a few tricks on getting it started

Posted on Feb 10, 2014

  • Bob MacDonald
    Bob MacDonald Feb 11, 2014

    This is true, but be careful to understand the return policy of where you buy a used one.

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Make sure an OBD reader is used to make a connection to the car's ECU/ECM. If no connection can be made, then you can remove the ECU and test it for current and resistance. If either of those tests fail, your car needs a new computer.

Posted on Feb 10, 2014

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Posted on Jan 02, 2017

mkv0525
  • 358 Answers

SOURCE: Battery not charging - Lexus ES300

your problem is the main fuse is blown under hood. it will be like a 100 or 120 amp fuse bolted in from sides of fuse/relay box.

Posted on May 20, 2009

  • 199 Answers

SOURCE: Will Not start even if you jump it nothing.

it is absolutely the starter solenoid im not sure if you can replace just the solenoid but you definitely need a new starter / solenoid.

Posted on Jun 24, 2009

tunde007
  • 2382 Answers

SOURCE: hi.my son (college student/part time

Hi, causes of excessive current drain from a car battery include things like lights that remain on (trunk and hood lights, interior lights, brake lights, etc.) and also relays that may be stuck on, or modules that are not going to sleep or powering down. A fuel pump relay that sticks on may keep the fuel pump running after the engine is shut off. A switch or relay that powers a rear window defogger can stick on, pulling current from the battery after the ignition is off. An electronic suspension module, ABS module or keyless entry module may remain active long after it should have powered down.An accessory such as a DVD player, game console or cell phone charger left plugged into a rear seat power receptacle may be pulling power from the battery. So before you spend a lot of time trying to figure out where the amps are disappearing, check all of the vehicle's power receptacles to see if something is plugged in that may be using power.

FINDING THE CAUSE OF THE CURRENT DRAIN


If the key-off current reading is above specifications (typically, more than 50 mA one hour after the vehicle has been shut off), the current drain is too high. It's time to start pulling fuses and relays to find the fault. Refer to your vehicle owner's manual or a wiring diagram to identify the fuses and relays. Then pull the fuses and relays one at a time until the current reading drops. Avoid pulling the fuses for the PCM or other KAM-sensitive modules until you have checked all of the other circuits.
Once you've found the circuit that is causing the excessive current drain, check the relay, switch, module or other components in the circuit and replace as needed.
Sometimes a bad alternator diode can cause a car battery to run down. A good diode should only pass current in one direction. If it leaks current in the opposite direction, it may keep the charging circuit on when the engine is not running, causing the battery to run down.

Posted on Oct 06, 2010

astrawoid
  • 294 Answers

SOURCE: my car just stopped ....lost power. Battery is

Have your alternator tested very soon. You charge it up, it runs good, then over time, it loses power. To me, that sounds like all your electrical loads are being carried by the battery alone, with no help from the alternator.

Posted on Dec 01, 2010

mgomez0824
  • 351 Answers

SOURCE: bought new battery at autozone changed battery and

you might of blown your main big fuse and maybe a couple of fuseable leaks it will blow fuses and relay be fore irt would hurt your engine

Posted on Jan 26, 2011

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1 Answer

Son Installed new battery and now no current to anything


Measure the voltage in the new battery. It should read close to 12Volts. Some batteries need to be charged before they are sold. Perhaps yours didn't. Have you tried to charge it yourself?

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How to jump start a vehicle safely


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I plugged in a code reader into my 1996 chevy 1500 2wd 4.3L and it came up as a cam position sensor. i bought a new one from autozone and replaced it. i put it all back together. and now the truck wount...


TURN OFF RADIO.TURN OFF IGNITION SWITCH.REMOVE NEGATIVE BATTERY CABLE FOR 2 MINUTES THEN REPLACE HOOK THE NEGATIVE BATTERY CABLE BACK TO BATTERY AND TRY CRANKING THE TRUCK.

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Hi i have just had a new alternator, ignition leads and fuel filter fitted to try and cure bad misfire and flat battery, my spark plugs are wrong for my car could this be the problem as it is worse than...


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Car won't start and battery is fully charged and cables are not loose. What else should I be looking at? We just had the rear brake system completely replaced.


Items to check out Battery and battery cables (Load test battery and make sure cables are clean and tight especially the B+ cable off the starter).
Listen to the cranking speed of the starter. Does it sound normal or slow? Depending on what you hear you may want to do a starter current draw test or have a shop do it for you.
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When you put the key into the ignition and turn it to on position do you hear the fuel pump buzz?
No buzzing sound ... you could have either a bad fuel
pump or relay. Either way the vehicle is going to a shop for further diagnosis and repair.
Ignition check WET WIRES will usually give you a misfire unless the coil pack they are attached to was submerged in water. Then you may have major engine problems like a hydro locked engine.
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Pull off a spark plug attach it to its wire and ground its electrode . Crank engine and look for spark.
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Wont turn over after new starter fitted hv can only jump start by turning over at starter


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on average removing a starter isn't that bad... normally 2 bolts and the wires from the battery... BUT... sounds as though you may have a problem with the starte's friend.. the solenoid switch... i looked one up on autozone.com and the part # is SS725 and it costs right at 100 bucks... definately try to test the old one first... turn on your ignition switch car in park if auto neutral if stick (e-brake on) and get a heavy guage wire or something to conduct electricity and touch across the 2 thick posts on the solenoid switch... small black thing in line of your positive battery cable to your starter... be very careful when you touch across it will most likely spark and the engine should turn over fine... if it does,, replace solenoid switch... rather costly solenoid but better then going to a shop.. hope that's al it is

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