Sounds like a relay may need to be replaced. Check all of your fuses. Check the relays. I believe the Jeep has a relay for the headlights I could be mistaken. It would be my guess. But also, how long since you replaced the bulbs. A friend of mine had hers flicker when it was a "friendly reminder" to replace. But when you change something, it's always smart to replace the fuse that goes with it.
Best of Luck
On
these issue, there are few solved help links for troubleshooting the
issue easily.-------
Click
the link below: ---
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
-----------
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
-------------
http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html
--------------
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
------------
http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html
----------
http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
----------
http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html
----------
Traction
control switch will not engage on 4WD High or Low
http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html
-----------
4WD light
flashing and 4WD will engage after few minutes
http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html
------------
http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html
----------
http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html
-------
-------------
http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html
----------
http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html
-------------
These
details will help.
Thanks.
4X4
On
these issue, there are few solved help links for troubleshooting the
issue easily.-------
Click
the link below: ---
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
-----------
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
-------------
http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html
--------------
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
------------
http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html
----------
http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
----------
http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html
----------
Traction
control switch will not engage on 4WD High or Low
http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html
-----------
4WD light
flashing and 4WD will engage after few minutes
http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html
------------
http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html
----------
http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html
-------
-------------
http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html
----------
http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html
-------------
These
details will help.
Thanks.
On
these issue,there are few solved help links for troubleshooting the
issue easily.-------
Click
the link below:---
No 4x4 light on dash?
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
-----------
4X4 Truck makes roaring
noise in the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
-------------
Car will not go into 4WD
high or 4WD low?
http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html
--------------
No 4x4 light on dash?
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
------------
4 wheel drive system will not disengage?
http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html
----------
4WD light is flashing and
beeping? NO 4WD high?
http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
----------
2002 Jeep Wrangler: 4WD Idiot Light is ON?
http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html
----------
Traction
control switch will not engage on 4WD High or Low
http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html
-----------
4WD light
flashing and 4WD will engage after few minutes
http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html
------------
2008 Toyota Tundra: 4x4 Wheel Drive Light is Flashing?
http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html
----------
4x4 front differential will not engage the
axle on ford?
http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html
-------
4x4 will not engage on Ford F150?
http://technoanswers.blogspot.in/2012/02/4x4-will-not-engage-on-ford-f150.html
-------------
Dodge Ram 4x4
light keeps flashing
4X4 LOW LIGHT
IS FLASHING ON DASH
http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html
----------
Ford 4x4 front wheels will not engage?
http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html
-------------
These
details will help.
Thanks.
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