Truck has 190,000 miles. OK, I promise this is happening. First, every now and then the truck won’t start. Turn the ignition key to the start position and nothing happens - like the battery is dead. Turn the key back to the off position, wait maybe 10 - 15 sec. Try and start again - starts right up. This maybe happens about half the time I start the truck. Always seems to start first start attempt of the day. Only later does it start to behave this way. I took it into a repair shop and they claimed it was the starter relay. After the repair (about two weeks) it seemed fixed - started all the time. Then a couple of days ago it began to do the same thing again. Only now, maybe 10 - 20% of the time doesn’t want to crank (vice 50% or more before the repair). Doesn’t seem to be the battery because when it cranks it cranks very strong and starts right up. Now additionally, today, the truck just dies while driving. Doesn’t stall or run rough just before dying - just dies - like turning the ignition switch to off. Interestingly, it starts right back up after this - no extended cranking, etc., just starts right up. I have tried “jiggling” the start switch to see if maybe it is failing, but it has no effect. That is, when the truck won’t crank, “jiggling” the switch won’t make it crank, and “jiggling” the switch while the truck is running doesn’t cause it to die. Sometimes, the waiting 10 -15 secs or so between crank attempts doesn’t work - that is, it doesn’t crank, but if I open up the hood and take the starter relay out of its socket and put it back in, it cranks.
I know, I know, sounds crazy, but I have duplicated this scenario many times. Now, as to the truck just dying, that only started today and I guess maybe has nothing to do with the cranking issue.
Thanks for any assistance.