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Battery Light and Tail Light Out On?

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1.4K views 16 replies 5 participants last post by  brchew  
#1 · (Edited)
Hello, I've recently had an issue with my camry, I didn't drive it for a week or so. After starting it up, both of those lights stayed on and after a few miles of driving those lights turned off. The battery is new and I have checked my tail lights and they are all working, so what could be the issue here? Both of these lights never appeared prior to me leaving it for a week or so. Thanks!
 
#2 ·
Usually battery light means that the alternator isn't giving the correct voltage to the system when the car is running. If you have access to a multimeter test the voltage across the battery while the car is running. Alternatively, you can remove the negative cable while it's idling and see if the engine starts dying immediately, not 100% accurate but gives you a good clue. As far as the tail light indicator I'm not sure, I would stay testing connections to set if there's anything out of the ordinary with that circuit.
 
#3 ·
3rd brake light working?
possible shorted wire(s) in a harness somewhere. driver's door closing area, trunk closing area, etc.
assuming you don't have any CEL's, stored or otherwise, and the lights come back, gonna need to do some further investigation. start opening up wire looms and doing the sherlock holmes impression with a magnifying glass and light and see what's exposed and tape it/them up.
tony
 
#7 ·
what car you got?
if it's i4 pre '96, then yeah. jumper the 2 pins and read the flashes. assuming the cel comes back after you cleared it.
if it's a v6 post '94, then hook up the scanner and it will give you much information.
tony
 
#12 ·
Follow Taleek's earlier advice about checking the running voltage with a multimeter or taking the car to Autozone for their free battery and charging system check. Never disconnect a battery cable on a running engine on today's cars. The voltage spikes created by doing this can ruin some of the sophisticated electronics in today's cars. This was a valid way of testing the alternator many years ago. I did it myself a few times but would never do it on today's cars.

Mike