Hi, I have an older RV with a SF-25 furnace in it. It has outside access and is pretty easy to remove. The furnace was working fine, but making a lot of noise/whining when running. So I pulled it out to see if I could lube up any moving parts and to make sure nothing was rubbing. When I put the furnace back in place, it will now not turn on. I have good voltage all the way to the time delay switch. But not going from the time delay switch to the motor. When I jumper the two blue wires on the furnace, I can get it to come on. But it will shut off shortly after removing the jumper. It does not have a no spark shut off and will run without ignition. The 4 wire connection from the rv to the furnace has 3 purple wires and one green(ground). I have good voltage (13V) coming from the one purple wire that matches up to the red on the furnace. Should there ever be voltage from either of the other two purple wires that match up to the blue wires on the furnace harness. What went bad on me from pulling it out and putting it back in? What other troubleshooting should I do? Thanks for your time and input.