? on codes
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New User
Joined: Feb 2004
Posts: 11
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From: Lansdowne
? on codes
Went to Auto Zone and had them check the codes on my 92 Ford F-150 V-8 5.0. The y came up with the code 631-Overdrive light circuit failure. Is this just the light on the overdrive switch? If not what is it?
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Does the light come on when you push the OD cancel switch? You have to push the OD cancel switch and the brake pedal as part of the test, so maybe the guy didn't push the button during the computer's self check, and it came up erroneously. Otherwise, if the light works, I'm not sure what the code would mean.
