Not positive on the 1999 GC but sounds like the auto shut-down relay which is controlled by the computer. If the computer gets info, which it recieves from various sensors, that in its programming its sees as harmfull to the engine, it will activate the auto shut-down relay which will turn off...
Before you go to a dealer , if you have access to wiring diagrams , you may want to check if there is a common ground for all your faulty items or maybe a relay. Grounding points can be funky especially in damp weather if they're corroded.
Jeep is still running great since I made the adjustment, knock on wood, and I heard the fix worked for one other person, so I guess that's what counts. I'm thinking that if it was a purely mechanical ignition system like the old points and distributor it would not have had the problem . If the...
Had the famous fantom stalling issue on my Grand Cherokee with codes such as Peak primary coil voltage not achieved in max dwell time and crank or cam sensor intermittent. I know from many web sites and chat forums that this is a common problem and probably several different fixes but just...