oleblue

First let me say that I have replaced the multifunction switch twice myself and the dealer replaced it once with no luck. The high beams and windshield wiper spray button on my truck work only about 5% of the time if that much. They don't come on at all the rest of the time.

When I drive down the road with just my headlights on and the driving beams turned off, they will flicker on and off by themselves as I'm driving. I am also having some trouble with my turn signals.

I have tried everything that I know how to do short of taking everything aftermarket, gauges, amp power steps, etc. off the truck and starting from there. The dealer is clueless so I don't know where to go from here. I can't even drive the truck at night on the count of flashing people with the lights. If someone could help me out I would really appreciate it.

2006Mega

have you checked any and all grounds, since it randomly turns on and off it sounds like a ground it going bad.
or some of these switches turn things on and off by grounding out a wire, maybe a wire or two has the insulation scraped off or has worn off some how.

oleblue

I took a quick look and didn't notice anything out of the ordinary. I will take a look again at the grounds and wires around the lights.

davidj54

There's two white/yellow wires running from the MF switch to the cluster Connector C3 terms 8 & 9. It depends on resistance to turn on the appropriate function. If these wires short to each other, to ground, or to hot, it would cause things to go haywire, especially if it's intermittent.

oleblue

Where can I locate cluster Connector C3 terms 8 & 9?? I would definitely like to check that out.