Last Thursday I had one of those exceptionally long days at the office and was the last one out. Looking forward to finally getting home, I hope in the truck, hit the key and .... nothing! No glow plug light, no solenoid sound, the engine cranked just fine though. It was about 30 degrees out, dark, and of course no one was around. I tried cycling the ignition about 20 times and finally gave up. I jiggled all kinds of wires, checked all of the fuses, etc.. Get back in the truck, and on the second try the plugs light up. Fortunately it didn't leave me stranded, but now I am semi worried that it will. First off, any ideas as to what happened, second will bypassing the solenoid fire the plugs? Any tips, tricks, or technical information would be appreciated.

Thanks, Chad