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Bad ECM relay?

6079 Views 3 Replies 3 Participants Last post by  dguttowsky, 
D
Been a while since my last visit to the forum. I have recently started experiencing some electrical issues. The 1st was a bad A/C compressor relay. It started to stick open intermittently. Shortly thereafter, my rpm and speedometer needles started "chattering" after I turned the key off. Today My motor suddenly shut down, all my dash lights came on for a second, then my motor regained power and I didn't have any more problems the rest of the day. I have learned that it may be a faulty ECM relay, which I am going to change. Problem is, I am not sure where or which one it is. If this doesn't correct the problem, it it possible to have a faulty battery or alternator? I checked my voltage at the battery terminals at idle and read 13.8 volts. Thanks for any help.
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Carsmak
More importantly, what's the voltage with the vehicle off, and better yet after it's been off for a while.

AC relay is a known issue, I believe Honda upgraded it with a better relay a few years later.

I've read about the speedo/tach issue, but the flashing dash lights, I have experienced and it was a battery with a dead cell, amazingly it could still start, but the rest of the electric items were all over the place, and as I have thought back, the first issue I experienced was the driver side window "AUTO DOWN" failed multiple times prior to the dash lights issue.

From personal experience eliminate the battery as a possible issue.
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E
Yes to the above. Check your batteries voltage after it has sat overnight (better yet 12hrs). Prior to the overnight test, make sure you drive a reasonably long distance and that you are seeing charging voltages (13.8 at idle is good) when the engine is running. Even better would be to put a known working battery charger on it. After sitting overnight your voltage should ideally have leveled off to around 12.7 to 12.8 volts. 12.5 or lower means your battery is weak.
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Ok , I will check the battery out. I would still like to know where the ECM elay is. Is there a link to a manual indicting where all the relays are. The owners manual only shows the fuse information.
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