Originally Posted by OldWEB
Typically the common point is the "hazard" switch. If you can, check the connections to it, maybe spray some contact cleaner into it and just operate it numerous times to 'clean' the contacts. Good luck!
Just went through this with 2002 3500 HD classic, same issue.
Dealer for new switch including cruise, turn signal etc. $550.00 plus
O Reillys, Approximately $130.00
Anywhere non dealer item just the switch itself, everywhere less than $20.00.
However, be sure and watch some YouTube videos FIRST!!!!!!
The switch itself is marginally more work than the whole assembly. But there are some tricks of the trade that make it impossible without the YouTube instructions.
I'm short term memory challenged to I had to watch the video as I did it. The other thing was I had to go to Harbor Freight for some picks.
OOPS I see yours is a Ford. all bets off.