Behind the left headlight on the side of the body with 2 10 mm bolts holding it two heavy wires and four lighter wires, one of the heavy ones is black with orange stripe.
Trouble code P1491 means: Radiator fan relay control circuit
The compressor relay on a 2003 Navigator is on the radiator support. It will be on the right side near the bottom of the support.
Mounted next to the radiator.
The horn relay on a 2003 Jeep Liberty is located in the engine compartment fuse box. To access it, open the hood and find the fuse box near the battery. The relay is typically labeled, so consult the diagram on the cover of the fuse box for the specific location of the horn relay.
The turn signal flasher relay on a 2003 jeep Liberty is in the fuse box that is below the glove compartment. Look for a large box type plug in with three prongs inside the fuse box.
The first thing to check is the radiator fan.
Fill it to within4 inches of the top and you will be good.
It says on the tag mounted on the radiator core support(of the 2002) 1.63lbs.
need wiring diagram for radiator fan control
tHERES A RELAY BEHIND THE GLOVE BOX THAT BURNS OUT THAT MUST BE REPLACED.
my fan went out on my wifes 2003 jeep liberty. i just spliced a wire from the wiring harness to another wire that turned on when the car turned on and the fan turned on.
On the V6 it is under the housing that the lower radiator hose hooks to on the engine. On the 4 cylinder it is under the housing that the upper radiator hose hooks to.