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Is the Service Vehicle Soon light illuminated on the dash? If so, the BCM has detected an electrical issue in the wiring circuit to the fog lights. If the SVS light is not illuminated, it is most likely the fog light relay is stuck in the on position. Open the hood and find the fuse center located on the driver side at the front shock tower. Remove the cover, look at the schematic on the underside of the cover and identify the fog lamp relay. Remove the relay and see if the lights go out. If the lights go out, you may need to replace the relay. You can substitute a like relay in the fuse center to verify relay is bad before buying a new one.
The 15A fuse 5A in the engine compartment relay box supplies power to the foglight relay. When the headlights are on, operating the fog light switch causes the contacts of the foglight relay to close and the fog lights turn on. At the same time, power that flows through 15A fuse 4 in the engine compartment relay box causes the fog light switch indicator to light.
Power for the instrument cluster is obtained through 40A fuse 4 in the engine compartment relay box and is routed through the taillight relay in the box. When the lighting switch is set to TAIL, the relay closes and power is routed through 15A fuse 4 in a fuse box in the ECRB to some of the cluster lamps. Power passes through a rheostat that controls brightness of other cluster lamps. In addition, an illumination module controls the radio dial lamp, the A/C switch lamp, and the cigarette lighter lamp.
I'm just now seeing your question at 3pm est so I don't know when you first posted it. Your car has several different wiring systems for the lights so you may have to get a book to figure it all out. There is a fog light relay, but it has nothing to do with the rest of the lights, unless your car also has an isolation relay. The isolation relay grounds the fog lamp relay on some models. There may also be an instrument cluster microprocessor if the car has automatic light controls or daytime running lights. Its possible you popped something in the headlight switch too. I would get a book with the diagrams and start at the fog lamp and dash light fuses then go from there. See if the fuses have voltage first. Some of the diagrams can be found online, such as at autozone's website under repair help.
There are several things that can cause your fog lamps to not work. The fog lamp circuits need to be diagnosed. Your entire fog lamp circuit can be tested at the plug for the fog lamp relay located n the relay box.
PIN 5 on the relay should have battery power at all times. This power comes from Fuse #43 (15 Amp) in the fuse and fusible link box in the engine compartment. If there is power at this pin, the fuse and the circuit between the fuse and the relay is good.
PIN 3 on the relay goes to the fog lamp bulbs. There should be continuity to ground through the bulbs on this pin. If you have continuity to ground, connecting a jumper wire between PIN 5 and PIN 3 should make the fog lamps come on unless there is a short circuit to ground, which will cause Fuse #43 to blow. If there is no continuity to ground on this pin, the problem is either that BOTH fog lamp bulbs are burned out or there is a break in the wire between the relay and the bulbs.
PIN 1 Is the battery power for the primary coil in the relay. This power comes from the headlamp switch and power is only supposed to be present here when the headlamps are on and the dimmer switch is on LOW BEAM. If power is not present at this pin, the problem is a bad headlamp switch or an open circuit between the headlamp switch and the relay.
PIN 2 Is the control circuit for the primary relay coil. The control circuit should have continuity to ground when the fog lamp switch is set to the ON position. If there is no continuity to ground with the fog lamp switch on, the problem is a faulty fog lamp switch, an open between the relay and the fog lamp switch, or an open between the fog lamp switch and ground E37 (right front of engine compartment) and ground F7 (left rear of engine compartment) Please note: This circuit has redundant grounds....if one ground is not making good contact, the other ground can still make the circuit work.
PIN 4 on the relay is not used.
If all of the circuits/pins are working as described above, replace the relay.
That is pretty much it... That is all you really need to know to get your fog lamp circuits diagnosed. Let me know if you need further assistance.
You need to check the bulbs.These are known to go out a lot.Also you can check that you have power to the lights with a test light.Sounds like a bulb or wiring problem.I have had a few of these that are broken off because they are so close to the ground.Depending on if your four wheeling or in snow country.Hope this helps.Good luck.
Fog lamps are installed on the front bumper. The switch is located
to the left of the steering column on the dash panel. The fog lamps are
turned off by the circuit relay when the high beam driving lamps are
turned on. The circuit relay is located on the right front wheelhouse
panel near the blower motor.
Good luck, and remember rated this help.
Removal & InstallationFog Lamp Element See Figure 1
Fig. 1: Exploded view of a fog lamp assembly
Remove the lamp stone shields, the four bezel attaching screws, and the bezel.
Remove the reflector assembly from the lamp body.
Remove the bulb holder from the assembly. Remove the element from the bulb.
DO NOT handle elements with your bare hands, always handle with a
clean cloth. Oil from your hands will cause the element to fail.
Installation is the reverse of removal.
Fog Lamp Switch The fog lamp switch is removed and
installed by simply prying the switch from the instrument panel and
unplugging the electrical connector.
FOGLAMP BEAM ADJUSTMENT
Position the vehicle on a level surface, facing a wall
approximately 25 feet away. Remove the lamp stone shields and loosen
the adjustment nuts.
Turn the fog lamps ON and adjust as follows:
Distance between the light beam centers should be equal to the distance between the lamp assemblies on the bumper.
Height of the light beams on the wall should be 4 inches less than the center of the lamp assemblies when mounted on the bumper.
Install all previously removed items after turning OFF the fog lamps.
The light on your interior button should only come on when the lights are on, so I wouldn't worry about that until the lights are fixed. There should be a relay for your fog lights. I would check your underhood fuse relay box. switch that relay with another, such as fuel pump. I lights come on and now vehicle won't start, you know that it is the relay you have now put in your fuel pump circuit from your fog lamp circuit.
I just saw fog lights on e-bay for about $125 - $130 + shipping.
So the relays are there? I have not checked not car yet. I was told fogs need a "J relay" and a "white relay with green feet" under the driver's side knee bolster, and a "gray relay" at the fuses. Please let me know if you have part numbers in case I need to order them. (Maybe I will try a donor car from a salvage yard). Good luck.