Question about 1991 Honda Accord

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'S' BUTTON LIGHT ON DASH

Runs well, then suddenly starts jumping, the "S" light on dash comes on, still jumping, then just dies. Boost it off, same problem. "S" button comes on by itself. Kills the battery.

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It is your transmission control unit (TCU) This is located under the passenger rug next to the main computer. I just purchased a reconditioned TCU for my 91 accord from an ebay seller called allcomputerresources. If he does not list a 91 accord TCU, then contact him to see if he can get one quickly. He will send it, and then you send the old one in as a core. My unit is running fine, and costs considerably less than from a dealer.

Posted on Nov 04, 2008

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