What is a fan speed control inspection

Your fog and driving lights help increase the range of visibility while you’re driving. Fog lights help spread a wide beam in fog conditions, so a driver can see more of the road. Similarly, driving lights will increase the light emitted on a dark road.
To engage this system, a driver will flip a switch that tells the car’s computer to transfer battery power to the lights. The fuses will prevent the system from becoming overloaded, and they will often blow if there is a problem.
If you notice that your lights aren’t working, a mechanic can perform a few simple tests to source the cause of the problem.
First, a mechanic will look for signs of cosmetic damage, like broken lights or frayed wires, that could be the cause of the malfunction. If none of that is present, a mechanic will look at the vehicle’s fuses to see if the fuse for the fog and driving lights has blown. This can be easily replaced if necessary.
If the fuse is in working condition, the mechanic will check the light bulbs for broken filaments. Finally, if the bulbs are working, a mechanic will check the relay and use a multimeter to test the relay’s resistance. The mechanic can replace the relay and rewire it if that is the source of the problem.
Key Takeaway Fog and driving lights play an important role in increasing driver visibility—especially in poor driving conditions. If your lights aren’t working, a mechanic will check the fuse, light bulbs, and relay to determine the source of the problem.

Common reasons for fog or driving light inspections

Fog and driving lights can stop working for several common reasons:
  • Blown fuse: If the fuse that connects to the fog and driving lights gets overloaded, it will blow and cause a break in the electrical circuit that controls the lights.
  • Dead light bulbs: Light bulbs will fail over time. If only one light is out, it is likely because of a dead bulb. One failed lightbulb will not impact the rest of the mechanism.
  • Faulty relay: The relay brings power from the battery to the lights. If it stops working, it will break the connection. Additionally, if it isn’t properly wired or grounded, it could get overwhelmed by the excess charge—which also will stop the circuit.

How important is a fog or driving light not working inspection?

Working fog and driving lights are important to keeping you safe on the road, particularly in bad conditions. If your lights aren’t working, it’s smart to get this checked out when you notice a problem.
If you have trouble seeing at night or need more illumination, get this inspection done as soon as possible. You make an appointment with a mechanic, and you shouldn’t need to get your car towed to the location.

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