Check for power at the light, if no power and fuse ok check for power to switch and power coming out of switch when switched on if there is power to switch but no power out from switch when switched on, switch is faulty, if there is power from switch, wire is broken between switch an fog light
SOURCE: Right Side taillight and front fog light not working
If you have a test light, connect direct to wire feeding tail light and a body ground to see if there is power. If there is, take probe and touch ground wire of bulb. If you test light comes on, you have lsot ground. If this has helped, please post as helpful. For faster help, please go live chat
SOURCE: Renault kangoo Trekka 1.9dci Rear fog light not working.
hiya put your headlights on and ignition then rear foglight/s they should now operate rear and front fogs usually only operate with head dipped lights on ? this is designed
Fig. Fig. 1: Unfasten the 2 Torx® fog light retaining screws (1), making sure not to disturb the adjusting screw (2) 
Fig. Fig. 2: Squeeze the bulb and socket retaining clip prongs inward ... 
Fig. Fig. 3: ... then pull the bulb from the rear of the fog lamp 
Fig. Fig. 4: Unfasten the fog lamp electrical connector 1,255 views
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