jeep grand cherokee and avital 4113

First thing I would check is at the plug end of the heavy gauge harness, is there 12 volts constant at the connector end of the two red wires. If those have 12 volts, plug the harness back into the 4113 brain, check the outputs of the pink, orange, pink/white, and purple wires while attempting to remote start. You should hopefully see 12 volts coming out of the 4113 on those wires. You might have to do this a couple of times to test all four outputs.When all else fails, Read the Instructions

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nss or brake wire being wrong will cause same issue

So that's two of us told you about testing plus pentavolvo just made some very good points. Things that will abort remote start:- Brake switch wired on input rather than bulb (output) side. Bad ground thus test. Hood switch wrong, shorting to ground. With tach not learned it will R/S but will shut down after 10-15 seconds. I once had a unit that had seemingly failed for no reason, I checked all the inputs, the owner had installed aftermarket LED rear lights, the R/S was sensing 2-3 volts on the break output. Also seen a parking (e) brake switch failed.

PROBLEM SOLVED! I was using a factory bolt under the dashboard as a ground connection but as soon as i switched it to a bolt connected to the chassis the system worked immediately. Thanks everyone for all your help! Your suggestions to check voltages and my ground connections were spot on, thanks so much!

WINNER ! WINNER!  Another chicken dinner... Glad to hear you got it going.When all else fails, Read the Instructions

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Clear case of someone not listening to the real experts here. May I pat Kregg and smokeman on the back and a small cigar for me for all pointing out the solution on the first page? OP next time you do an install please remember my signature line; the part about TESTING.