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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Diagnostic Port Location

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Old Dec 18, 2003 | 04:08 PM
  #1  
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Diagnostic Port Location

Can anyone tell me where the diagnostic port is located on a 1996 F250? I am thinking about getting a Superchip microtuner to reprogram the chip but I want to make sure I know where the thing plugs in before I buy it.

Thanks.....
 
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Old Dec 18, 2003 | 04:17 PM
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Within 3 feet of your steering collum (Required by law, OBD-II mandate). Most likely under the driverside dash. Mines an OBD-I so I cannot tell you exactly were it's at, but I should be right.
 
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Old Dec 18, 2003 | 05:14 PM
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Just below the ashtray
 
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Old Dec 18, 2003 | 07:16 PM
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Thanks very much to both of you
 
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Old Dec 19, 2003 | 06:46 PM
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Actually guys......I didn't find anything inside the cab of the truck (either under the dashboard or ashtray) and I was upside down under the dash trying to find it.......I did find a plug in the engine compartment on the firewall that says 'EEC Test' (a "D" shaped plug) that I assume is a diagnostic connection.... Can't find anything in my Haynes service manual (like that's a surprise) about it...
 
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Old Dec 19, 2003 | 07:54 PM
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I thought the port below the ashtray was for the electric trailer brakes?
 
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Old Dec 20, 2003 | 08:09 AM
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On a 96 with OBD-II the diagnostic port was relocated to the interior by the gov't. Mine's at the bottom edge of the I/P about even with the right end of the asytray. The older models had it in the engine compartment
 
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Old Dec 20, 2003 | 10:34 AM
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strage guru is right on that, but on some fords for some reason (like some mustangs) they are located facing sideways out of the center console about the rear of the radio distance back so you gotta really look. it is normally black and compact. the old EEC one you are talking about was on pre-96 vehicles right next to the hood hinge (driverside) fender, inside compartment of course. and about 2x the size fo the new SLC connector
 
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Old Dec 20, 2003 | 07:14 PM
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So even though my truck is titled as a 1996 model, I could assmue that it was built and sold before the government mandate was effective....possibly late '95....? If so....does this also mean that the Superchip 1715 microtuner will not work with my truck?
 
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Old Dec 20, 2003 | 10:35 PM
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Since it's an F250, the OBD-II regs might not apply to it. I'm not sure when they applied to over 8500 GVWR. If the connector is under the hood, for sure it's OBD-I
 
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Old Dec 21, 2003 | 08:12 AM
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That's what I figured...thanks for the info....
 
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