Generally, main headlights are to be used in low visibility conditions. Fog lights should be used only when the visibility falls to less than 100m. 6. Why should you turn your fog lights off when visibility improves? The important point here is about obscuring brake lights. Rear fog lights are brighter than standard tail lights, so when you brake, other motorists may not be able to see your brake lights illuminate. I’ve read a few posts recently, in which people are asking “where is the rear fog light?” or alternatively “where is the rear fog light switch?” This is my response to reading those posts, and it may turn into a small rant but I hope it is useful all the same. It may also help answer the question I see being asked many times: “what is this extra switch for on my dashboard?” I have isolated the OEM wiring circuit diagrammes for the rear fog, including the position of the relay.

I am convinced by multi-meter readings and continuity tests that the rear fog light relay inside the MFU is unable to latch "on". It is triggered by the r/fog light switch grounding a power transistor inside the MFU. The MFU is the red box behind the interior fuse panel. All relevant wires into the MFU indicate as expected, but no 12v out. The fog light switch is sound (same as a substitute in fact). I get the same problem and readings with a secondhand MFU. As the relay is not latching on, there's no voltage to the rear fogs, nor to the fog guard lamp in the instrument panel. How I get 12v into the "on light" of the fog lamp switch when it's depressed is a mystery.. Earlier on in this article I suggested you walk away if your prospective Japanese import vehicle has a MOT but no rear fog light. But what if it’s a bit late for that, because you’ve already bought it? An LED strip on the front of some cars are called Daytime Running Lights (DRL) and have been fitted to all new cars in the UK since 2011. They turn on whenever the car is switched on and are there to make the car more visible to other road users. They do not perform the same function as front fog lights. Now - I have not been successful yet in my search for a right side stalk with both rear and front fogs, and it may be that it was only designed for left hand drive cars in russia and some parts of asia. As mentioned earlier, you should not use your fog lights when the visibility is fine, in normal conditions, after the fog has cleared. This is because fog lights can dazzle other road users.Having problems deciding what could be wrong. The car is a 1996 Mk1 VVC - with rear fog lights not working. Tthere are no front fog lights fitted. Can anyone point me in the right direction please? i respect what you have advised, but, according to my reading of the instructions to MOT inspectors, those regulations are not part of the MOT inspection !

watch out for snowploughs which may throw out snow on either side. Do not overtake them unless the lane you intend to use has been cleared It would also be great to use the proper wiring loom and have the fuse and relay easily servicable. I'm convinced the clue to the problem is the dim light in the foglight switch that's always on with the ignition, but extinguinguished when the stalk light switch is turned on. TOP TIP: If you don’t have a helper, park next to something reflective. A wall or garage door will do. It is legally required to have at least one rear fog light, in the UK, so every car will have at least one rear fog light. Since front fog lights are not a legal requirement, most car manufacturers only offer them in the high-end models. They can be found below the headlights. What Is The Difference Between Daytime Running Lights And Fog Lights

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In the case of the 2016 Volvo S60 (pictured), a couple rear lights illuminate when you push the button, making the Volvo much easier to spot on the highway in the fog and other poor conditions. Volvo lights are one of the most common examples of rear fog lights. The rear fog lamp is a useful safety feature, but issues arise when drivers are unaware of the feature and switch on the fog lights in normal driving conditions. Sure, you might get a little extra forward road illumination, but you’re also unknowingly blinding drivers behind you and sometimes even making them think you’re braking. Therefore, these optional fog lights should not be used as normal driving lights. If your vehicle has rear fog lights, only switch them on when you are driving in fog, snow or other conditions that may prevent another driver from seeing your vehicle. Does Your Car Have Fog Lights in the Rear? I have confirmed via the russian owners manual that their lighting stalk is on the left and includes the rear fog position (you have to pass through the front, so front is always illuminated if rear are) Using fog lights in drizzle and rain is not allowed, and you are even eligible for a fine from the police if caught. So, make sure that you switch off your fog lights once the fog has lifted. How Should You Use Your Car’s Fog Lights? I see both sides of the argument, and I can see merit in both reasoning. But it is strange that people like us live in europe and embrace things differently than we do.

The switched circuit of the relay gets 12v live feed from a splice into the n/s rear side-light wire, the switch "on" terminal connects to a splice into the n/s fog-light wire. The symbol for the rear fog lights is an oval-shaped lamp with three horizontal lines bisected by a wavy vertical line on its right. When Should You Turn Your Fog Lights Off? If you choose only one rear Fog for your reasons, thats fine. If you choose no rear fogs at all, again thats fine.Full compliance with this guide doesn’t guarantee a pass. You’ll need to view the IVA Inspection manual for the full requirements and testing procedures needed to get your vehicle passed.

Fog lights are also not to be used when it is wet, as the extra brightness of fog lights can result in their reflection off a wet road surface, and can cause unnecessary dazzling reflections, which is not good.i bought a universal fog light wiring loom kit as a plan B,to run the new loom right up to the original bulb holder,instead of trying to find a correct led bulb,that i can put into the place,i take the original bulb holder out of...