Here is a mod to do for the new S40 / V50. You can add the right (passenger) side rear fog light bulb in about 10 minutes. First remove the light cover in the trunk and push both tabs on the white plastic piece to pull the bulbs out of the rear light. All of the bulbs are on the same white plastic assembly. When you have this removed you will see the holes where the bulbs came out of. One of these holes (at the bottom) will still have a black piece of plastic covering it. I used a pair of needle nose plyers to remove that and it came off easily. Be sure not to drop it into the tail light. Simply put a P21W bulb in the empty socket on the white assembly and replace everything.
Now ... After I did this, the bulb worked for a few minutes then quit. I checked with a multimeter and there is now juice to the socket. I dont have any blown fuses and cannot figure out why this would work for a few minutes then stop. Would the ECM recognize the light? There is so little out there on the new S40 that I am at a loss.
Here is the legal disclaimer...Make sure it is legal to do this in your area...

Now ... After I did this, the bulb worked for a few minutes then quit. I checked with a multimeter and there is now juice to the socket. I dont have any blown fuses and cannot figure out why this would work for a few minutes then stop. Would the ECM recognize the light? There is so little out there on the new S40 that I am at a loss.
Here is the legal disclaimer...Make sure it is legal to do this in your area...

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