Hi! this is my first time at this Mazda forum, but I came here because I could use your knowledgeable advice. I have a 2000 Mazda MPV that won't start. It starts on a warm day, but when it gets really cold overnight, the car will not start in the morning. I have to trickle charge the battery back to full in order to get the car started. This battery is a brand new Die Hard. I also went back to exchange because I thought it was faulty, however after sears tested it, it turned out to be in perfect condition. I also got the alternator checked out and it turns out to be fine. What is causing my car to lose it's electrical charge? I really appreciate your guys' advice

-Jason

 

You need to check for a voltage draw [dark current] Install a amp meter between the neg battery post and cable. read the amp draw with everything turned off. After aprox 30 mins the amp reading should be no more than 50 milliamps. Pull fuses one at a time untill the amps drop if the amps reading is high. when you pull a fuse and you see a drop in the amp reading you have found your problem circuit. good luck