Whether fog lamps before or after the fog lamps, as long as it is not lit, that means that the light bulb has burned, must be replaced. But if not broken, just reduce brightness, dim the light is red, also absolutely cannot treat STH lightly, because it could be an early sign of failure, and reduce the performance of the lighting is also great hidden trouble of safety. Brightness reduce several reasons, the most common is the astigmatism there is dirt on glass or mirror product of lamps and lanterns, then need to do is clear the dirt with flannelette or lens paper clean can. Another reason is loss of battery charging, lead to power shortages in brightness is not enough, so you need to replace a new battery. There is also a wire aging or may be the line carefully, resistance increase caused by power supply, this kind of situation not only affects the work of the light bulb, serious even lead to overheat and cause a fire. When there is no fog driving in the city at night, do not use fog lamps, front fog lamps without the hood, can make the car lights, affect driving safety. Some drivers not only use the front fog lamp, even after the fog lamps are open together. Because the fog light bulb after power bigger, to the back of the car driver form the dazzling light, easy to cause eye fatigue, affect driving safety. Circuit installation 1 only when the position lamp (light) opens, the fog lamps to open. 2 after the fog lamps shall be independent closed. 3 after the fog lamps can work continuously until the position close lamp. 4 before and after the fog lamps can share front fog lamp switch in parallel, should increase the fog light the fuse capacity at this time, but the added value of not more than 5 a. 5 no car front fog lamp, fog lamps should be parallel in position on the lamp, after another set up after the fog lamp switch, switch should be a series of 3 to 5 a fuse tube. Fog lamps switched on after 6 suggested configuration instructions. 7 from the fog lamp switch after driving indoor place after the fog lamps to the power cord along the original vehicle wiring harness always go after car rear fog lamp installation location, through a dedicated car after splicing and fog lamps, reliable connection lead choose the thread diameter of 0.8 mm or more dedicated car low-tension wire, wire length should be set for 4 to 5 mm in diameter PVC pipe protection (plastic hose) do. Replace the fog lamps 1 unscrew the screws and remove the light bulb. Unscrew the four screws removed 2 cover shell. Take off your cap spring 3. 4 for halogen bulbs. 5 mount holder spring. 6 install four screws and cover. 7 to tighten the screws. 8 adjusting screw to light. In this paper, by the DANYANG YIKAI AUTO PARTS FACTORY