I have a Honda Accord 2006. The battery is a 45amps. If i leave my car untouched during the day for 4-5hrs, nothing happens and it starts at first kick. But if i leave it over the night for like 8hrs, the battery runs down and i sometimes cant even open the doors. I've tried isolating some circuits( doors, CD player) and it still ran down by morning. i've been adviced to get a bigger battery (55amps) but i dont know if that is really the solution to it as it might still run down if left for 10-12hrs. I've doing so many traces and no mechanic has been able to discover anything left on when the car is off.
Any advice please?
Have you done the tried & true method of connecting a test light in between your + battery connection & battery post? Simply remove battery+ connection, attach test light from it, to post at battery. As long as test light is lit, you have a draw. Brighter the light, bigger the draw. Of course you'll have radio memory etc, so I just pull those out from the start. If you know where they all go back to, I pull them all out, and when light is out, I start reinstalling them one by one, when light comes on, I note it, remove it, then replace next one, until I've recorded all the draws & noted which one(s) that made the light come on the brightest, then do my research around that or those particular circuits. Quite often you can watch light & pull one at a time & will suddenly see light dim quite a bit, and that is a good indicator of big draw circuit.
Hi mate. From what you are saying, to me you have a short some where in the wire harness.
the best way is to have use a test meter on the batterys negtive lead ie,(black) from the battery to the body. Take each fuse out one at a time and check the ready on your meter, and replace if that fuse is not doing nothing to the reading. You should find the short that way. if all else fails you will have to sell the car or disconnect the battery, over night.
DON'T PUT A BIG AMPED BATTERY ON YOUR CAR!!!!!! it with blow all the fuse's and damage the starter.
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