Lamps/Lighting - Exterior: Headlamps

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

CONDITION	POSSIBLE CAUSES	CORRECTION
ONE HEADLAMP DOES NOT ILLUMINATE	1. Faulty or missing fuse.	1. Test and replace headlamp fuse as required.
	2. Faulty or missing bulb.	2. Test and replace headlamp bulb as required.
	3. Faulty ground circuit.	3. Test and repair open headlamp ground circuit as required.
	4. Faulty supply circuit.	4. Test and repair open headlamp low beam, high beam, or DRL relay output circuit as required.
BOTH LOW OR HIGH BEAM HEADLAMPS DO NOT ILLUMINATE	1. Faulty or missing relay.	1. Test and replace low beam, high beam, or DRL relay as required. (Note: Vehicles with a DRL relay do not use a high beam relay. The DRL relay cannot be tested. Replace DRL relay with a known good unit and check operation. Replace DRL relay as required.)
	2. Faulty control circuit.	2. Test and repair open low beam or high beam relay control circuit as required.
	3. Faulty switch.	3. Test and replace multi-function switch as required.
	4. Faulty BCM inputs or outputs.	4. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to BODY DIAGNOSTIC PROCEDURES .
HEADLAMPS DO NOT EXTINGUISH	1. Faulty supply circuit.	1. Test and repair shorted headlamp low beam, high beam, or DRL relay output circuit as required.
	2. Faulty control circuit.	2. Test and repair shorted low beam or high beam relay control circuit as required.
	3. Faulty relay.	3. Test and replace low beam, high beam, or DRL relay as required. (Note: Vehicles with a DRL relay do not use a high beam relay. The DRL relay cannot be tested. Replace DRL relay with a known good unit and check operation. Replace DRL relay as required.)
	4. Faulty switch.	4. Test and replace multi-function switch as required.
	5. Faulty BCM inputs or outputs.	5. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to BODY DIAGNOSTIC PROCEDURES .
HEADLAMPS WILL NOT SWITCH FROM HIGH TO LOW BEAMS, OR FROM LOW TO HIGH BEAMS	1. Faulty relay.	1. Test and replace low beam, high beam, or DRL relay as required. (Note: Vehicles with a DRL relay do not use a high beam relay. The DRL relay cannot be tested. Replace DRL relay with a known good unit and check operation. Replace DRL relay as required.)
	2. Faulty switch.	2. Test and replace multi-function switch as required.
	3. Faulty BCM inputs or outputs.	3. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to BODY DIAGNOSTIC PROCEDURES .