Merry Christmas to all,

My truck has 140,000 miles on it and has started, run, driven fine most of the time. Today I had to engage 4wd to get up my driveway (snowstorm). I park it and a few hours later I go to start it and nothing. Will not turn over at all. Battery connections, battery and all related fuses and relays are good. Noticed when I turn the headlights on, there is no dimming as though there is no current even going to the starter. SN. I put it back in two wheel before I parked it last. Could this be a linkage issue with the park/neutral safety switch?

Thanks for any input.

 

Possible. Also, try swapping the starter relay, with one of the others. See what happens.