Why wont my jeep start? even with the remote starter?

Try it with shifter in neutral ..!!

You may have a bad starter or starter relay, Check the starter relay first since its the cheapest and try to start again. Sometimes you can swap a horn relay and the starter relay to try it. As long as there is a relay with the same color and part number you can swap and try it out. The relay is located under the hood near the fender in a box. The relay box cover should have a diagram under it to show the location of the relay, if not you can find it in your owners manual. If the relay swap does not work, plan on replacing your starter, but be sure you have a good battery first. In most cases a low battery might just be the culprit.

AFTERMARKET remote start? Check the install , corrosion at spliced wires is common cause of failures.