Need help-dash haywire-won't start. - Page 3 - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #21 of 28 (permalink) Old 04-21-2019, 11:08 AM Thread Starter
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Anyone know how to locate and troubleshoot the BCM?

2006 Mazda6, 3.0L v6, six speed auto (all stock, and loving it.)
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post #22 of 28 (permalink) Old 04-22-2019, 08:33 AM Thread Starter
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Yesterday I put a dehumidifier in the garage. This morning the car fired right up.


Moisture is getting into something.

2006 Mazda6, 3.0L v6, six speed auto (all stock, and loving it.)
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post #23 of 28 (permalink) Old 04-22-2019, 11:04 AM Thread Starter
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Tried to start it again after an hour and same problem. I removed that first ground connection (close to the negative battery terminal) and sanded away the paint. Then everything was cleaned with a wire brush and sand paper (everything.)
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post #24 of 28 (permalink) Old 04-23-2019, 02:32 PM Thread Starter
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And there it goes. Off to the shop.
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post #25 of 28 (permalink) Old 04-23-2019, 03:48 PM
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Well that sucks. Keep us posted on what it was. It may help someone else out in the future.

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post #26 of 28 (permalink) Old 04-23-2019, 05:04 PM Thread Starter
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And it's back. The shop said it was a bad terminal clamp on the positive battery cable. The part was $4.99. It looked perfectly fine to me.

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post #27 of 28 (permalink) Old 04-23-2019, 05:19 PM Thread Starter
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post #28 of 28 (permalink) Old 04-23-2019, 09:10 PM
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Originally Posted by TampaBay6 View Post
And it's back. The shop said it was a bad terminal clamp on the positive battery cable. The part was $4.99. It looked perfectly fine to me.

[]
Bad terminal clamp?!? To think that you have gone to all that hassle when it's just an easy fix!

Well, who am I to speak? I had one experience to my old car that it won't start. I left it overnight to a shop and got it the following morning. They won't charge me for the fix. After two days, the car won't run again. The lights are coming on but won't start. I called for help. The guy checked the starter and it's good. Every relay is also good. It was by "chance" when he found out that I have a loose ground terminal to my transmission.

I think that's why the shop won't charge me for the fix last time. I suspect that the car started when they checked it.

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