Where is the 1991 Jeep Cherokee OBD port location?

I’ve inherited an old Jeep from my dad and it needs some fixing up, but I have no idea what I’m doing with an older car like this. Can you tell me where to find the OBD port on a 1991 Jeep Cherokee?

Pat Roache · Answered on Feb 21, 2023
Reviewed by Shannon Martin, Licensed Insurance Agent.
You must be pretty skilled in DIY maintenance and car repair if your dad entrusted you with his old Jeep, but it’s definitely not as easy on a car this old. You can still find an OBD port location on a 1991 Jeep Cherokee, though probably not the one you want. Instead of the current OBD-II style port, the ‘91 Cherokee only comes with an OBD-I port.
The OBD-I port is located beneath the dash, but it’s completely different from an OBD-II port. If you connect an OBD-I scanner, your 1991 Cherokee’s Check Engine Light will flash in a pattern that acts as the diagnostic codes.
OBD-II scanners weren’t standardized until 1996, but the classic Jeep Cherokee is a bit of an exception—OBD-II technology and port locations were added to this make in 1992, but that won’t help you much for a 1991 model.
Unless you’re well-versed in classic car technology, you’re probably better off taking your car to a mechanic to get a professional diagnosis.
Who knows? Someone may just be willing enough to take you under their wing and give you a lesson in OBD-I diagnostics!
View full answer 
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings — it's 100% free