09-04-2011, 03:40 pm
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| Corvette Enthusiast Join Date: Aug 2011 Posts: 3
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|  '81 OBD I plug
I just had the ECM rebuilt in my '81 4 speed. The OBD plug is under the ashtray on the consol, but the plug does not match my meter plug and I can't find any adapter plugs. I know you can jump it for codes, but I would like to use my meter, it's easier than counting blips. Does anyone know of an adapter or can I wire in a newer plug? My plug has 5 pins in one row, the meter and all newer cars have two rows with 4 pins on top and one on the bottom row. I could get a plug from the junk yard, but I need to know how to wire it (if this would work).
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09-05-2011, 09:18 am
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| GM World Class Certified Technician  Join Date: Nov 2006 Location: New Haven Ct Posts: 5,141
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HI there, GM did issue an adapter to use with the Tech1A. You can certainly get a plug and swap the terminals, as I have done that before on a few 1981. I can get you the wiring pin locations if you can obtain it. Allthebest, c4c5 | ||||||||||||||||||||
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09-06-2011, 07:10 pm
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| Corvette Enthusiast Join Date: Aug 2011 Posts: 3
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I sure could use your help on the pin locations. I think one of my problems is the cats are removed and it has '69 sidepipes. The oxygen sensor is still in there.
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Linear Mode
