Good sets of keywords in search engines can save time and money. There’s a lot of good information on publicly viewable Internet discussion boards for troubleshooting Jeeps. On Jeeps with computers, getting the trouble codes (even with the key switching combination for some year models) helps with most electronic repairs.
But sometimes, the computer’s self-diagnostic outputs don’t help much. Here’s an example. A woman’s Cherokee would turn over but wouldn’t start. She spent over $400 at a garage on random ignition work before having it towed home without a repair. After a couple of questions, an acquaintance of hers put a crank position sensor on it within a few minutes to get it going. Some men posting answers to discussion boards have experience with likely failures.
The only computer related part is the ignition module on an aftermarket distrubtor. A night and day difference.
The wiring for signals and the like is dead or very frail. Wire replace and test as I go. I would like to rig up a backup light switch that will trip when shifted. Saw a few ideas.
Heat shrink is another new friend.