Question about 2001 Lexus ES 300

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2001 Lexus 300 alternator repair

I was told by AAA that the alternator wasn't charging the battery. How do I remove the alternator to take it to be tested and then replace it if needed?

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  • camelfive Jul 26, 2009

    Do I use jumper cables to the Lexus from our Chevy Tahoe? How long do I leave the cables on until it is charged. AAA said to have it towed. Will it charge and be able to be driven for 5-10 miles?

  • camelfive Jul 26, 2009

    Did you receive my follow up question and how do I see your answer if you did?

  • camelfive Jul 26, 2009

    jumped the car and it is running now. I still have the cables hooked up from the Tahoe. Does that help? Should I leave them hooked up while the Lexus is running? Or shoud I have the Lexus off and the Tahoe running with the cables still attached to charge it?

  • camelfive Jul 26, 2009

    Hello, I received the 2nd e-mail... do you have an answer to my question back about the charging? Thanks, Paul

  • camelfive Jul 26, 2009

    Thank You.... I am taking it to Advanced Auto Parts about 3-4 miles away. I'll let you know what they say. They can get an Alternator for about $145 from their Fort Myers store. Does that sound right? Should I take the bad one to an auto electric place to have it rebuilt? How difficult is it to take off and replace. Looks like I would disconnect the negative terminal from the battery and then disconnect the wire connections for power and from the spark plugs and then two bolts to release it from the belt and the engine block. Am I missing something?

    Thanks, Paul

  • camelfive Jul 26, 2009

    Thank You for all the help. I took it to Advance Auto Parts on Pine Ridge Rd in Naples and they tested it and said the alternator was fine and the battery was old and bad. They took out the old battery and cleaned the corrosion off the connections and sprayed it. Great advice as it saved me a lot of work and expense. Thank You again. Paul

  • camelfive Jul 26, 2009

    This was extremely helpful. The advise to first charge the battery and get the system tested at the parts store kept me from taking out the alternator and then putting it back. Not to mention the $145 for an alternator I didn't need! So much for the AAA advise to my 20 year old daughter to have it immediately towed to a repair place for the alternator.


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First charge the battery to full capacitt with a battery charger then drive it to a parts store for testing without removing this way the can test it underload and test the battery and the voltage regulator at the same time they can also check if the battery cables are defective and for free.

Posted on Jul 26, 2009

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  • Bruce Hathcock Jul 26, 2009

    Yes you can hook the cables up for 20 minuts and drive 10 miles just be sure ac is off but you could take the battery to the store have them put a charge on it for you test the battery and then if the battery checks out take it home and drive the car, the brake lights and everthing else will work for an hours driveing before causing any problems. you can do it with thecables but the only thing is they need they battery to be at lest charged to 12 volts to really test the altanator and regulator, if it's at the store they could top off the battery and then can test the whole system and not cost you anything except for the part you buy, it is a curtsy service for auto zone or schucks and others do it as well.

  • Bruce Hathcock Jul 26, 2009

    keep the one that need the charge off do not RUN THEM BOTH LEt the Truck charge the car for 30 minutes If there is a problem with the altanator you should not have the car on till done chargeing after at least a 1/2 hour.

  • Bruce Hathcock Jul 26, 2009

    there is a belt tension-er, be sure you have a belt diagram for it. Put a half inch breaker bar or ratchet into the tension-er pull it to loosen the belt, if you don't know have them show you at the parts store. slide the belt off the alternator then disconnect the positive terminal first and then the two wires off the back of the alternator tape them so you know where they go and it should have a ground wire. your alternator will be taken as a core and buy the three year extended warranty if you plan to keep the car. While having the belt off look to see if it is cracked, if it is I would replace it now, check the idler pulley turn it and see if it feels smooth if it is don't bother with it but if it is loose or feels gritty replace it, check the water-pump pulley see if it turns smoothly if it does then install the alternator then the belt. buy battery post felts and buy battery protect-ant and spray the protect-ant on the cable ends and posts once you install the cables, this will keep it from corroding and you can forget about your car. Before you go to that store call the other stores and get a price check if there is one cheaper auto-zone will match their price. good luck.

  • Bruce Hathcock Jul 26, 2009

    your welcome please rate me and I think you have another pro that you need to accept his work with you so he gets paid, we live and die by ratings. C-ya paul, thats why I wanted you to test the whole system you just saved 145.00 bucks.


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