I am looking at buying a 01 ML4390 and the AUX Lights do not work. These are the PIAA fog lights mounted on a bull bar. I have checked all the fuses and relays and all that looks fine. Can anyone give me some idea what to check next. Do you think maybe the switch is bad? The bottom portion of the switch works fine for the rear fog lights. I just cant get the front fog lights and the Aux lights to work.
Thanks for any help.
