Blade Posted November 19, 2021 Posted November 19, 2021 Vacant plug located between left front fender and air intake box. Any one know what it's for? 1991/4.0/automatic/4X4/factory AC delete.
Minuit Posted November 20, 2021 Posted November 20, 2021 Yep, diagnostic plug. If you have a compatible scanner, you can look at live data, trouble codes, and do some basic bi-directional tests.
ghetdjc320 Posted November 20, 2021 Posted November 20, 2021 Chrysler SCI port. As mentioned above, it’s a diagnostic port. There are a few scanners that can read it in addition to the DRB tool from Chrysler.
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