Technical DIY instructions covering common issues on the Renix XJ Cherokees and MJ Comanches (1987-1990). Preventative and proactive procedures to save you headaches, time, and money.

Many of these tips were provided to me and my buddy Joe by JeepTech when I was Service Manager/Shop Foreman at a Jeep dealer from 1980 through 1992. That’s what “The Book” is all about. Our notes from back in the day. Right from the Field Service engineers. Thanks Lonnie and Big Al!!  Most were never published, until now.

Tips 1 through 5 are a great place to begin before chasing your tail with parts replacements on your 87 and 88 Jeeps.  These are pretty much “haftas” in Renix Jeep ownership. You can skip Tip 2 if you have an 89 or 90. But, do the Tips first……….Avoid firing the “parts cannon” at your Jeep!!!!!!!

The next priorities on your Renix Jeep are Tips 11, 13, 31, 25 and 26

A simple multimeter is handy along with a few other basic tools……so dive in and get to know your Renix Jeep.

Some Tips also transfer to later years, or the techniques can be adapted.

If you have a 91 or later, see Tips 1, 3, 10, 11, 12, 15, 16, 18, 19, 20, 24, 29, 30, and 36.

If you have an 84 through 86, see Tips3, 12, 15, 16, 18, 19, 20, 28, and 30.