Wire harness to driver-side headlight disconnects repeatedly.
Several parts were lying loose inside and outside the headlight housing, including a hard plastic collar (F4DB-13N019-AC) and a soft rubber end cap (4S4X-13N168-A). Lamp is fine. A diagram of the assembly would be helpful.
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That Uhaul harness is the first thing to check. Next would be the ground wire/s at the rear lamp. Your problem is that when the head lights are off, the rear light is grounded the the headlights(no power to the headlights). When you turn the head lights on, you loose the ground because the headlights over power the rear ground. Your flasher is not the problem. Use the OHM part of the meter(lowest setting) to check for ground. Anything above 5 Ohms is a wire replacement.
When looking from the outside of the headlight at the bulb, can you see the bulb clearly?? These lenses are notorious for dulling very badly. If it has you can use a regular headlight 'restoring' kit sold at most auto part locations.
If it is not a lens issue, you may have a wiring/supply issue. Then you would need to find the troublesome wire/connection. I am not the best at wiring issues, but I would try to find a power source wire with the same amperage rating, run a bypass jumper from a known good voltage source and see if the light changes. If no change, your problem may be the harness or plug at the rear of the headlight bulb. Hope I could help GL
Locate the two headlight lens assembly retaining screws at the top of each side of the assembly.
Remove each screw with the ratchet and a suitable socket.
Place the screwdriver behind the lens assembly to assist in prying out the guide pins that secure and align the headlight assembly. Hold the lens assembly from the outside edge (marker light/directional light section) first and pry from behind with the screwdriver to unseat the guide pins. Pry from the inside end of the lens assembly to unseat the other guide pin.
Pull the lens assembly out far enough to reach behind it and disconnect the headlight bulb wire harness from the back of the bulb. Or simply remove the bulb by twisting the harness and retaining ring counterclockwise and remove it as an assembly.
Turn the marker light/directional light socket and wire counterclockwise to remove it from the headlight lens assembly.
Remove the assembly from the front of the Stratus.
Act like you are going to turn on the headlights while doing so push in on the switch and it should now be able to be pulled out...look at the wires and make sure none of them are loose, verify contacts are still hitting the actual inside of the switch....verify no fuses are blown and check the contacts in the wiring harness at the headlight.
Since it's on the passenger side you'll need to remove the air filter housing & filter to get to the housing for the bulbs. Right behind that bulb housing there are two rubber coated caps (those caps are where the bulbs are located) that you'll need to remove. They can be tough to remove so it should be ok to use a flat head screwdriver to GENTLY pry the caps. Just make sure you are GENTLE with it and once it is loose use your hand to turn it counterclockwise about 1/4 turn. Gently pull it out then unplug the wire harness to it.
**** IMPORTANT*** Like most headlight bulbs, DO NOT TOUCH THE NEW BULB WITH YOUR BARE HANDS. Halogens are ruined by our natural oils and it will make your new bulb burn out extra fast. Also: The outside bulb should be the LOW BEAM and the inside should be the HIGH BEAM. Let me know if you have any other questions and I'll be happy to help.
since i've not personally had a chance to get my hands on this model of vehicle yet, i'm going to make an educated guess based on how it is done on the 02 sierra, since both are gm products. On the sierra there are 2 rods right at where the headlights are under the hood. Remove those rods to release the light bezels, the bezels should be able to be easily removed. from there just remove the bulb from its' socket, disconnect it from the wire, put in the new one and reassemble. Hope this helps
Disconnect the negative battery cable.CAUTION After disconnecting the negative battery cable, wait 2 minutes for the driver's/passenger's air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
Remove the instrument panel by performing the following procedure:
Remove the trim from the right and left door sills.
Remove the trim from the right and left cowl side inner panels.
Remove the steering column opening cover from the instrument panel.
Remove the 2 hood latch release handle-to-instrument panel lower reinforcement screws and lower the release handle to the floor.
Disconnect the driver's side air bag module wire harness connector.
If equipped, disconnect the overdrive lockout switch harness connector.
Do not disassemble the steering column but remove the assembly from the vehicle.
From under the driver's side of the instrument panel, disconnect or remove the following items:
The screw from the center of the headlight/dash-to-instrument panel bulkhead wire harness connector and disconnect the connector.
The 2 body wire harness connectors from the 2 instrument panel wire harness connector that secure the outboard side of the instrument panel bulkhead connector.
The 3 wire harness connectors from the 3 junction block connector receptacles located closest to the dash panel; 1 from the body wire harness and 2 from the headlight/dash wire harness.
The plastic park brake release linkage rod-to-rear parking brake release handle lever. Disengage the linkage rod from the handle lever.
The stoplight switch connector.
The vacuum harness connector from the left side of the heater/air conditioning housing assembly.
Remove the instrument panel center support bracket.
Remove the instrument panel wire harness ground screw located on the left side of the air bag control module (ACM) mount on the floor panel transmission tunnel.
If you are replacing the headlight bulbs, rotate the bulb retaining lock ring counter-clockwise, pull retainer out of headlight housing and disconnect electrical connector. On the drivers side, you have to remove the fuse and relay box screws and move the box to the side to access the headlight bulb.
If you are replacing the headlight housings, there is a push pin and 2 screws on the inside, behind the hood and one screw on the outside at the bottom. Remove these and pull the housing out enough to remove the bulb retainers.
Remove the upper headlight housing mounting bolt and pushpin
Remove the lower headlight housing mounting bolts
Pull out the headlight housing assembly and disconnect the electrical connector.
Its pretty easy. Just raise the hood, see the two silver 8mm cap screws on top of the cross member that supports the radiator and fan assembly. Two screws on each side above the headlight housings. The outer screw is right next to the corner of the fender when the hood is raised. Remove the two screws, then the headlight assembly is loose. Just gently pull the headlight assembly forward enought to see the three lamp socket holders on the back side of the headlight assembly. From the outside corner to the inside are first, the parking turn signal, then the low beam lamp and finally the last, the high beam lamp. To remove the lamp socket, push the small plastic locking tab and turn the socket assemby counter clockwise about a half turn and remove the lamp. Now you can replace the lamp and install it back the same way you took it out. Don't touch the new lamp glass with your bare fingers. Oil from you skin will absorb into the glass causing the glass to turn dark and shorten the lamp life.