The hot oil warning light is not for the engine oil, it's indicating the auto transmission oil is too hot. If you are climbing a long hill with the over drive engaged (button in front of shifter) it will constantly shift jumping in and out of a lower gear. With the 4hi engaged it adds addition work load to an already hot tranny. If the light comes on stop and left the engine idle in park for 5 minutes. Turn off the OD and continue on.
The light that comes on when 4 wheel drive is engaged is not the service light. It is just an indicator light that comes on to let you know the 4 wheel drive is engaged. It will go off when the 4 wheel drive is disengaged.
The 2004 Jeep Wrangler has four wheel drive.
The 2001 Jeep Wrangler has four wheel drive.
The 2003 Jeep Wrangler has four wheel drive.
The 2007 Jeep Wrangler has four wheel drive.
The 2002 Jeep Wrangler has four wheel drive.
The 2006 Jeep Wrangler has four wheel drive.
The 2005 Jeep Wrangler has four wheel drive.
The 2014 Jeep Wrangler has four wheel drive.
The 2009 Jeep Wrangler has four wheel drive.
The 2011 Jeep Wrangler has four wheel drive.
The 2012 Jeep Wrangler has four wheel drive.