battery drain 2001 rx300
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Driver School Candidate
Joined: Jun 2011
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From: Ohio
battery drain 2001 rx300
I have been having battery drain, used the test light and started removing fuses until the light went out, when i removed a white fuse, marked short in the panel box description the test light went out, started vehicle all is fine except navigator display, no radio, I can't find any other description for this fuse, any help in this matter would be appreciated, Thanks....Tom
huh? test light???
oh, you are seeing what fuses have power with the ignition off... well, it is perfectly normal for many circuits in the car to be live with the key in the off position... that fuse you removed is used for keeping radio station presets and such stored in the head unit... it is a draw on the battery, but a perfectly normal one, unless there is something wrong with the unit itself...
what you need is an Ammeter... these measure how many amps are being drawn through individual (or groups) of wires...
How fast is the battery dying? Has it been tested? A marginal battery may be enough for it to start and run a vehicle, but, left overnight, may not have enough reserve capacity... Even if the battery is new, it may still have issues... Please test it and report back...
oh, you are seeing what fuses have power with the ignition off... well, it is perfectly normal for many circuits in the car to be live with the key in the off position... that fuse you removed is used for keeping radio station presets and such stored in the head unit... it is a draw on the battery, but a perfectly normal one, unless there is something wrong with the unit itself...
what you need is an Ammeter... these measure how many amps are being drawn through individual (or groups) of wires...
How fast is the battery dying? Has it been tested? A marginal battery may be enough for it to start and run a vehicle, but, left overnight, may not have enough reserve capacity... Even if the battery is new, it may still have issues... Please test it and report back...
"Short" is the short pin... its not a fuse, it supplies power to a lot of different items. You need to do a draw test, with an DVOM, checking how many milliamps are being drawn with the key off, doors closed, security armed, and computers asleep... Anything below 50ma is good.
Thread Starter
Driver School Candidate
Joined: Jun 2011
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From: Ohio
Thanks guys, the battery is new, checked with a volt meter and when running it is reading 14.44 volts, I'll have to do a draw test and get back to you, this problem started about a year ago after we bought the car, brought it back and they replaced the battery, it lasted about a year and the it started again in Feb, brought it back and they replaced the battery again, so 4 months later it did it again and i started trying to check myself and had a friend advise me to do the test light and pull fuses, I sure appreciate the feedback on this problem, i will get back to you with the reading with the DVOM, again Thanks.....Tom
Thread Starter
Driver School Candidate
Joined: Jun 2011
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From: Ohio
I removed the short fuse and the battery has been ok, Lexus dealer said it may be the navigator unit that has to be replaced, when i am going to use the vehicle i just put the short fuse back in and go, when i get back home i remove it, not about to spend big bucks they want on a vehicle i am probably going to sell in the very near future..............
I removed the short fuse and the battery has been ok, Lexus dealer said it may be the navigator unit that has to be replaced, when i am going to use the vehicle i just put the short fuse back in and go, when i get back home i remove it, not about to spend big bucks they want on a vehicle i am probably going to sell in the very near future..............
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From: Miami, Florida
I've always had a question about this for ones that did connect to the 12v source. How long does that self-contained battery last? And if it dies, would it start feeding off the battery?
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