2000 Millenia - New battery, new problems, ECM fuse? Please help! - Mazda Forum
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post #1 of 11 (permalink) Old 03-06-2010, 10:45 PM Thread Starter
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Our battery died on our 2000 Millenia. A neighbor offered to jump start it and when he did, he applied negative to positive and vice versa. In doing so, he blew our 120 amp fuse. We (not so easily) replaced the fuse and the battery and the car started right up. However, it is running rough, idling low, the radio will no longer come on and the CEL light is on. Every time we start it, the heater and clock go back to the setting they were in right before the battery died, even though we have reset them each time we have driven it since. We took it to Autozone and the guy could not get a code reading off of the car. Advance Auto suggested the problem may be the ECM fuse. Anyone have any thoughts or ideas as this is our main transportation to work????? Thanks so much in advance!
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post #2 of 11 (permalink) Old 03-07-2010, 12:17 AM
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I would start checking all the fuses. Fuses are good insurance but if you reverse the polarity they may not be enough. How about your neighbor? He doesnt have any damage?

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post #3 of 11 (permalink) Old 03-07-2010, 07:13 AM
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Our battery died on our 2000 Millenia. A neighbor offered to jump start it and when he did, he applied negative to positive and vice versa. In doing so, he blew our 120 amp fuse. We (not so easily) replaced the fuse and the battery and the car started right up. However, it is running rough, idling low, the radio will no longer come on and the CEL light is on. Every time we start it, the heater and clock go back to the setting they were in right before the battery died, even though we have reset them each time we have driven it since. We took it to Autozone and the guy could not get a code reading off of the car. Advance Auto suggested the problem may be the ECM fuse. Anyone have any thoughts or ideas as this is our main transportation to work????? Thanks so much in advance![/b]
The ROOM fuse is responsible for back-up memory of ECM, climate, clock and radio. Did you check it?
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post #4 of 11 (permalink) Old 03-07-2010, 09:30 AM Thread Starter
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The ROOM fuse is responsible for back-up memory of ECM, climate, clock and radio. Did you check it?[/b]
Thank you very much for your response! Only thing we need to know now is where it is, exactly! Lol! Hate to bother. Thanks.
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post #5 of 11 (permalink) Old 03-07-2010, 01:39 PM
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Thank you very much for your response! Only thing we need to know now is where it is, exactly! Lol! Hate to bother. Thanks.[/b]
The ROOM fuse located in cabine fuse box (near left drivers leg). 15 A in low row.
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post #6 of 11 (permalink) Old 03-07-2010, 01:54 PM
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Wow reverse polarity sounds very dangerous. Did the neighbor get any damage to his car?

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post #7 of 11 (permalink) Old 03-07-2010, 03:44 PM Thread Starter
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The ROOM fuse located in cabine fuse box (near left drivers leg). 15 A in low row.[/b]
Thanks so much - my husband is on his way to get a new one!
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post #8 of 11 (permalink) Old 03-07-2010, 03:46 PM
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Check all of your fuses, the one's in the cabin and the main fuse block in the engine bay

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post #9 of 11 (permalink) Old 03-07-2010, 03:47 PM Thread Starter
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I would start checking all the fuses. Fuses are good insurance but if you reverse the polarity they may not be enough. How about your neighbor? He doesnt have any damage?[/b]
No, he used a battery he had, not his car. He was half asleep and didn't have his glasses on, so he didn't catch it. Scary thing is, he's an airplane mechanic!
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post #10 of 11 (permalink) Old 03-07-2010, 03:49 PM Thread Starter
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Wow reverse polarity sounds very dangerous. Did the neighbor get any damage to his car?[/b]
No, he used a battery he had, not his car. He was half asleep and didn't have his glasses on, so he didn't catch it. Scary thing is, he's an airplane mechanic!
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