Replace low beam headlamp, passenger side, 2004 Navigator

On the inside of the lid is a diagram .
The headlamps may be turned ON 2 different ways. First, when the driver places the headlamp switch in the HEADLAMP position, for normal operation. Second, with the headlamp switch placed in the AUTO position, for automatic lamp control (ALC). During ALC, the headlamps will be OFF in daylight conditions, or low beam operation in low light conditions. Battery positive voltage is supplied to the low beam relay and the high beam relay in the underhood fuse block. When low beam headlamps are requested, the body control module (BCM) supplies ground to the coil side of the low beam relay. This activates the relay and the relay supplies voltage to the left hand low beam headlamp through the LH LOW BEAM fuse and to the right hand low beam headlamp through the RH LOW BEAM fuse. Ground for the left hand low beam headlamp is provided at G101. Ground for the right hand low beam headlamp is provided at G102. When high beam headlamps are requested, the body control module (BCM) supplies ground to the coil side of the high beam relay. This activates the relay and the relay supplies voltage to the left hand high beam headlamp through the LH HIGH BEAM fuse and to the right hand high beam headlamp through the RH HIGH BEAM fuse. Ground for the left hand high beam headlamp is provided at G101. Ground for the right hand high beam headlamp is provided at G102.

check fuses in box near coolant reservoir.fuses should be marked on box cover.hi/lo and left and right fused individually for atotal of four fuses for headlamps.

Did you ck fuse F1.40? 20 amps.

Change the bulb/globe or whatever you call them.

Check old one most likely filament is broken in it.

1. Open and support the hood.
2. Remove the grille.
3. Pull up on the retaining tabs in order to remove the headlamp assembly from the headlamp panel.
4. Disconnect the headlamp leveling electrical connector from the motor/actuator if equipped.
5. Disconnect the headlamp electrical connector from the headlamp assembly.
6. Remove the side marker socket from the headlamp assembly.
7. Remove the park/turn socket from the headlamp assembly.
8. Remove the headlamp assembly from the headlamp panel.
9. Remove the access cover from the rear of the headlamp.
10. Disconnect the electrical connector from the socket.
11. Rotate the bulb and socket counter clockwise in order to remove the bulb and socket from the housing.
12. Disconnect the electrical connector from the socket.
13. Remove the bulb and socket from the headlamp.

Replace the low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a grey socket.

HEADLAMP BULB REPLACEMENT

REMOVAL PROCEDURE

CAUTION: Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments. To help avoid personal injury:

• Turn off the lamp switch and allow the bulb to cool before changing the bulb.
• Leave the lamp switch OFF until the bulb change is complete.
• Always wear eye protection when changing a halogen bulb.
• Handle the bulb only by its base. Avoid touching the glass.
• Keep dirt and moisture off the bulb.
• Properly dispose of the used bulb.
• Keep halogen bulbs out of the reach of children .

NOTE : Avoid touching the bulb or letting the bulb come in contact with anything damp. Oil from your skin or moisture on the bulb can cause the bulb to explode when the bulb is turned on. If either comes in contact with the bulb, clean the bulb with alcohol or a suitable degreaser and wipe the bulb dry.

1. Open the hood.
2. Remove the headlamp. Refer to Headlamp Replacement .

1. Remove the access cover from the rear of the headlamp.
2. Disconnect the electrical connector from the socket.
3. Rotate the bulb and socket counter clockwise in order to remove the bulb and socket from the housing.
4. Disconnect the electrical connector from the socket.
5. Remove the bulb and socket from the headlamp.

INSTALLATION PROCEDURE

IMPORTANT :

• Replace a high beam bulb with another high beam bulb. The high beam bulb has a black socket.
• Replace a low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a grey socket.
  
  1. Position the bulb and socket to the headlamp.
  2. Connect the electrical connector to the socket.
  3. Install the bulb and socket to the housing by rotating the bulb and socket clockwise, locking the retaining tabs to the housing.
  4. Install the access cover to the rear of the headlamp assembly
  5. Install the headlamp

REMOVAL PROCEDURE

1. Open the hood.
2. Remove the headlamp.
3. Rotate the bulb and socket counter-clockwise in order to remove the bulb and socket from the housing.
4. Remove the side marker bulb (3) or turn signal/park bulb (4) from the socket.

INSTALLATION PROCEDURE

1. Install the side marker bulb (3) or turn signal/park bulb (4) to the socket.
2. Wipe the bulb with a clean cloth to ensure the bulb is free of any dirt or oil.
3. Install the bulb and socket to the headlamp by rotating the bulb and socket clockwise, locking the retaining tabs to the headlamp.
4. Install the headlamp.

high beam or low beam? or both of them on one side.

• One low beam headlamp is inoperative

• Central junction box (CJB) fuse 23 (10A) (RH headlamp).
• CJB fuse 25 (10A) (LH headlamp).
• Circuitry.
• CJB.

• Go To Pinpoint Test C .

• One high beam headlamp is inoperative

• Circuitry.
• Headlamp assembly.

• Go To Pinpoint Test D .

• The high and low beam headlamp is inoperative on one side

• Circuitry.

• REPAIR ground circuit 57 (BK).

• Headlamp switch
• Multifunction switch
• Vehicle Security Module

• Central junction box (CJB) fuse(s):
  • 17 (15A)
  • 23 (10A)
  • 25 (10A)
  • 35 (20A)
  • 40 (20A)
• Circuitry
• Headlamp bulbs
• Daytime running lamp (DRL) relay

your owner manual will list the bulb. It is expensive. tascafordparts.com for discount from Ford Dealer

here's 2003, don't have 2004

Navigator high intensity discharge (HID) headlamp

1. Remove the front radiator air deflector.

1. Remove the three bolts and the headlamp assembly.
• Disconnect the electrical connectors.

8. Remove the headlamp bulb protective cover(s).

• Remove the HID lamp cover.
• Remove the high beam cover.
• Disconnect the electrical connector and push the grommet into the headlamp assembly.

1. Release the spring tabs and remove the HID low beam bulb.

switch your #45 relay for cooling with #46 for HDM. I just had this problem with my blazer and we just fixed it but doing that.

Your headlamps [lowbeams] work with the alarm system under the passenger seat. Any malfunction with the alarm devices under the seat will interfere with your headlights [lowbeams] functioning . I used to have the same problem with mine until I changed my alarm devices. I will advice you to go to a junckyard near you and remove the passenger seat from an 84-89 300zx and with a 14mm socket remove the seat,then; used a 10mm socket to remove the alarm devices. Do not worry, the wirings are the same on all of them. Good luck!