[BRSRT8]

Hey Guys,
When trying to start the Jeep I'm getting a Single-Click and no Cranking at all. It's just Click and turn the key off. It did it one time yesterday, but then was fine the rest of the day. This morning it won't start at all. In Dec 2019, I had a new 800 CCA AGM Battery installed and a New (not refurbished) OEM Starter Motor installed (purchased right from the Jeep Dealer)- I've only put maybe 20,000 miles on the battery and starter since Dec 2019.
I'm thinking it might be the Starter RELAY SWITCH, but not sure which one is that in the under-hood fuse boxes. I found the Starter Fuse and that looks to be ok. Does anyone know which position the RELAY SWITCH is for the Starter and in which fusebox?

Thanks.

 

[BRSRT8]

UPDATE: 45 mins ago I disconnected the Negative Terminal on the Battery and let it sit. I then just gave the starter motor a couple whacks, then hooked the battery back up and there was still only a one-click and no other sign of life. So I figured what the heck I just kept turning the key on/off for maybe 5-7 times and then she just started right up like there was never a problem. Battery shows 14.68V running, and the Starter just immediately turned over, there were no signs of any struggles to start or anything like that... just turn the key and instant start, which has been the norm since installing the new battery and starter motor.
I really think it's probably the Starter Relay Switch that's getting ready to fail. Would a Starter Relay that is starting to fail cause intermittent start-ups?

 

[TD-5]

Check out this thread

2014 Still stuck with weird starting issue??? Help

So first advice was to change the 9 year old battery. ✅ Change the fob battery. ✅ Just changed the starter tonight. ✅ Issue remains the same as the video below at if the electric is being shut off, but if I keep pressing the button it eventually starts. Auto start is now not an option. It...

www.cherokeesrt8.com

 

[BRSRT8]

Check out this thread

2014 Still stuck with weird starting issue??? Help

So first advice was to change the 9 year old battery. ✅ Change the fob battery. ✅ Just changed the starter tonight. ✅ Issue remains the same as the video below at if the electric is being shut off, but if I keep pressing the button it eventually starts. Auto start is now not an option. It...

www.cherokeesrt8.com

Thanks, I'll read thru that. I was able to get the Jeep over to the Jeep Dealership and they hooked it up to a computer and it showed no issues or codes coming up. They started it up and shut it off like 10 times in a row and no problem. They told me they don't think it will do it again. He was thinking maybe I "missed" a start by turning the key and letting o to quickly or not quickly enough and the starter just had a bad spot. Not sure that sounds right, but as usual, the dealership was not able to duplicate it so sends me on my way.

 

[Renfrick1]

My ram does the same thing. I replaced the starter , Key module, battery. If I keep trying it it does start. Weirdest thing.


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[White Elemant]

Sticky solenoid?

As for battery voltage: when the engine is running, you are actually measuring the alternator voltage, not battery.