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New battery won’t start

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New User

Nov 1, 2018, 5:43 PM

Post #1 of 2 (400 views)
New battery won’t start Sign In

I have a 2008 Mazda Tribute that I replaced the battery in 3 months ago. The vehicle sat idle for about a week and a half and now will not start.

Hammer Time
Ultimate Carjunky / Moderator
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Nov 1, 2018, 7:06 PM

Post #2 of 2 (393 views)
Re: New battery won’t start Sign In

You probably have a parasitic drain on it.

There is a procedure for finding a battery draw like that.

You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 30 to 40 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.


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