1994 F 150 Codes - No Scanner
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Joined: Mar 2008
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From: South Georgia
1994 F 150 Codes - No Scanner
Is there a way to check the codes on a 94 F-150 without a code reader? There is a large and a small connector under the hood. I've used a scanner to do this but now I don't have a scanner. Thanks, Mike
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Joined: Jul 2006
Posts: 7,555
Hi Mike..
Yes,, you can.. If you jump the Signal Return and the Self-Test Input connections you can get the self test codes as CEL flashes with the vehicles check engine light. You can also use a analog meter or test light and get the codes as needle sweeps or lamp flashes straight off the dianostic connector on the Self Test Output.. Here's a simple hookup diagram to retrieve the codes..
Yes,, you can.. If you jump the Signal Return and the Self-Test Input connections you can get the self test codes as CEL flashes with the vehicles check engine light. You can also use a analog meter or test light and get the codes as needle sweeps or lamp flashes straight off the dianostic connector on the Self Test Output.. Here's a simple hookup diagram to retrieve the codes..
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