1999 Holiday Rambler Endeavor 5.9 cummins won't crank.

My older DP 5.9 has another solenoid that gets the power from my key to send power to the fuel valve and then sends the signal to the starter solenoid. I have had the situation where the main 12v wire terminal to the first solenoid had come apart and caused a no start or crank. I have also replaced the 12v signal wire from the steering column to that solenoid. Perhaps that could be the problem. Good luck.