[jkudave]

Unless your Jeep's wiring was modified, the front turn signal bulbs are 3157NA and the front fender side markers are 168.

From the 2015 Full Owner Manual:

Headlamps (2) - H13
Front Park/Turn Signal Lamps (2) - 3157NA
Front Side Marker Lamps (2) - 168
Fog Lamps - PSX24W
Rear Stop/Tail/Turn Lamps (2) - 3157
Center High-Mounted Stop Lamp - L.E.D.
Backup Lamps (2) - 3157
License Lamp - 194

NOTE: Numbers refer to commercial bulb types that can be purchased from your local authorized dealer. If a bulb needs to be replaced, visit your authorized dealer or refer to the applicable Service Manual.

 

[jkudave]

Front Park/Turn Signal Lamps (2) - 3157NA

that is the reason for my post.. no change from factory on any of the wiring.. which this is not in question.
It is actually the receptacle ..
The 3157 NA bulb is centered for the alignment stubs on the bulb base..
the 2015 turn signals have staggered receivers in the receptacle..
Not sure why the books show the 3157NA and it doesnt fit..

I ordered a couple of amber turn signal lights for the front from a 13 and it is the 3157NA bulb. it has centered grooves for the bulb..

interesting dilemma..

3057, 3157, 4057, 4157 should all be interchangeable. Try another number and see what you get.