Battery Problem

[mikeyl74]

Hi Guys my battery keeps discharging on my 02 plate 4.6is, fitted a new battery and to be honest it did not let me down untill recently again so around 2/3 months! it sat for a week recently and started first turn, but since then its discharged over night twice! Any ideas???

Thanks

[kablammo]

From what I understand there may be multiple relays that can fail and lead to battery draining. They fail and in-turn keep accessories turned on and drain the battery. The Aux fan relay and anything related to the audio system could be causing the drain. Do you hear anything running when it should not be? I'd first make certain that it's not your battery and have the battery properly load tested. Any local parts store can perform this service, although it is a pain in tear to get the battery. I know you just replaced the battery but maybe it's defective. Maybe try turning off all your accessory lights as a precautionary measure until you find the root cause. Hold the middle map light switch for 3 seconds and this will disable all accessory lighting. Electrical gremlins are no fun, please keep us posted on your results as I'm sure my post will not be the the most informative.

Best of luck.

K

[mikeyl74]

Thanks Kablammo! Looking through other posts what i have noticed is that my heater fan sometimes keeps blowing when the engine is off and the key out of the ignition! To be honest i pressumed it was normal like sometimes external fans run when ignition off and never thought anything of it! Ive ordered a new Final Stage Resistor after some advise on here so i will keep everyone informed if it works!! Bloody Cars!!!!

Thanks

Mike

[mikeyl74]

Changed the FSR and all seems to be ok now!!! It was running away to itself when i was under the dash when the keys were out of the ignition!!! Beware if you do change one it gets really hot!!!! As the tips of my fingers will tell you haha