I picked up both an M725 and M715 over the last several months.
I seem to be having a similar problem with both.
Blinkers and headlights seem to work intermittently.
Will work fine for a while and then just stop working.
I checked the blinker control switch in the M725 looked very good inside. I swaped the light control toggle switch out of the m715 into the m725, but it did not seem to alter the problem. Is there any common problem with these trucks that I should check 1st? I also could not find any fuses in the truck?