Interior and Exterior lights pulsing Dead Short Possibility?
I have a 2000 Lexus ES300. I have replaced both the Battery and the Alternator. Testing the battery with no load it reads 12.33v
With the Alternator running I tested the votage at the Battery and it reads between 13.77v and 13.89v. I never have a problem starting the car as the battery is being sufficiently recharged. The car will drive perfectly for 100 miles or more and then it begins acting up ie. All dash, interior lights and headlights will pulse on and off in a rhythmic fashion, becoming stronger until the idiot lights on the dash come on along with the Battery light and it tries to shut the engine down. It has done this on several occassions. When the lights are pulsing the transmission shifts very hard and erratic and the engine seems to miss a little. No codes show up for the transmission when I last had it checked. It seems to me to be some type of internal short. Is there any inexpensive way to locate this problem?
I have same problem on a 1999 Camry with only 65k miles on it. Replaced battery and a 500 dollar alternator.Every light flickers and is a real annoyance. I have same problem on a 1999 Camry with only 65k miles on it. Replaced battery and a 500 dollar alternator.Every light flickers and is a real annoyance.
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Usually that fuse powers the alternator and the fuse box. It would have to be a big short to ground to blow that fuse. Its possible the main wire to the alternator is touching a metal spot, or the alternator is shorting out inside when it is running. What is draining the battery may be something else, or the battery could be discharging after the fuse blows if the alternator is not charging it.
Two 8mm bolts secure this fuse to fuse box. They are accessed from under the fuse bx which will require removing the box itselt from location near battery and inverting to undo.
take a test light and check your fuses , make sure both sides of the fuse is hot ! check power at alternator if no power gos in no power will come out.
In most car models I have had to remove the fuse box retaining bolts and lift the fuse box up and go under the fuse and remove 2 small bolts that retain the heavy alternator fuse in place, it is the only fuse that is bolted in to the box from under the box. Always disconnect the battery negative cable before you start work.
Hi Susie, Turn on the head lights and get someone to observe them while trying to start. If they dim during trying to start, replace the battery. Regards John
You definately have a short draining the battery- Try pulling the fuse to interior light/radio memory then hook up a 12v test light between the unhooked positive + cable and battery post{ leave the fuse out when testing other fuses} - If it still lights start pulling fuses 1 at a time and if your lucky it should go out when you find the faulty circuit- Then you have to diagnose that circuit for a short... If it still stayes on with fuses pulled have the alternator checked for bad diodes...Hope this helps
Unfortunately, with a dead battery you can't diagnose where the power drain is, it could be a door switch leaving the interior lights on, or a short circuit somewhere. Before purchasing a new battery, you could put a charge on the existing battery to get the car started. Also check for corrosion around the battery cables and posts. This would prevent you from jump starting your car. Once started, you can check things like the alternator for problems.
i would say that the regulateur on the altentor under pressure can not supply the charge. it might test good but it's not just have a shop replace your alternateur and that should solve your problem.hope this works for you .
I have same problem on a 1999 Camry with only 65k miles on it.
Replaced battery and a 500 dollar alternator.Every light flickers
and is a real annoyance.
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