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Thread: Mystery DEAD Electrical System

  1. #1

    Default Mystery DEAD Electrical System

    My son is away at summer school in his '02 3.0L 6cyl Accord. He calls yesterday to tell me that he went out to find the car completely dead. Not a flicker of a dome light, no instrument panel response from turning the key, absolutely nothing. We had AAA come out and do a system test, and they put in a new battery. Alternator, starter and the rest tested fine. He goes out this morning to find the car just as dead as it was yesterday.

    Just listening to his description, it seems to me that we have gone beyond a normal battery drain, such as some device being left on (and he assures me that could not be the case - last time it was driven was in daylight, so it's not the headlights).

    Anyone have any ideas on what to look at first? It's like a total power disconnect from the electrical system. Any input would be greatly appreciated.

  2. #2

    Default

    Check the AC compressor relay. Sometimes they fail and cause the power to the compressor to stay on until the battery dies.

  3. #3

    Default

    UPDATE! So, after AAA came out with a new battery, the car was completely dead again the next morning. AAA comes out again to test the system, puts in a SECOND new battery and leaves. Son goes out later that afternoon to a dead car. We have it towed to the shop that is owned by the mechanic that came out. While my son is at the counter, receiving the bad financial news regarding basic diagnostic charges, one of the other counter guys interrupts with, "Excuse me, did you say that was an old Accord that keeps dying?"

    "Yes it is!"

    He grabs a small blister pack off of his parts rack and says he'll be right back. He's back in literally two minutes. "You're all set!" Didn't even charge him for the part, let alone the installation. The brake light switch gets old and the plastic "cap" on the top breaks off, creating a short to the brake lights that nobody noticed in the bright sunshine.

  4. #4

    Default Great news

    Thanks for sharing the solution!



    Quote Originally Posted by dlyoung1 View Post
    UPDATE! So, after AAA came out with a new battery, the car was completely dead again the next morning. AAA comes out again to test the system, puts in a SECOND new battery and leaves. Son goes out later that afternoon to a dead car. We have it towed to the shop that is owned by the mechanic that came out. While my son is at the counter, receiving the bad financial news regarding basic diagnostic charges, one of the other counter guys interrupts with, "Excuse me, did you say that was an old Accord that keeps dying?"

    "Yes it is!"

    He grabs a small blister pack off of his parts rack and says he'll be right back. He's back in literally two minutes. "You're all set!" Didn't even charge him for the part, let alone the installation. The brake light switch gets old and the plastic "cap" on the top breaks off, creating a short to the brake lights that nobody noticed in the bright sunshine.

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