I'm trying to add a resistor to the positive parking light wire on a led 1157. 12volt car. I want to dim the parking light bulb so when I use the brake or turn signal I can notice the difference. Right now the brightness is about the same between the parking light and brake light on. I don't know what size resistor. I was going to cut the wire and add the resistor. I've tried a 50w 6 ohm resistor used for hyper flash and it changed it very little. Thank you. I was thinking a 400ohm. But what wattage 1?