Ram won't start
My son has a 1997 Dodge Ram 1500 4 x 4 - 5.9L
A week ago he went to help some friends out how were stuck in a grassy field area. There are trails on this area that are full of ruts. He was in the side that had some water but not alot but a pretty bumpy ride. He was in 2 wheel drive so not very deep.
He went through the puddle path and got onto the dry trail. The truck died on him. There were no lights or anything and it would not even attempt to start. He opened up the hood and saw that one of the wires on the positive battery terminal had come loose. He stripped the coating back and tightened down the terminal with the wire under it. The lights came on in the vehicle now and he was able to get it to turn over but it wouldn't start.
He couldn't get it started that night so the next day we had it towed into his work. He has been trying to diagnose what is causing it and here is what he found so far:
There is no spark, the fuel pump does not turn on so it is not getting any fuel, and when you try to start it, the RPM gauge does not move. The TOW truck driver thought it would be the crankshaft position sensor. He is having trouble locating that but knows the general area of it.
He changed out a blown fuse in the interior box for the cigarette lighter. He changed a fusible link in the engine box that was marked for the trailer. He changed out the ASD sensor which was actually testing good. Today he opened up the distributor and looked for moisture and found none. They tested for spark at the coil and found no power going to that so it was swapped out for a new one. It sounds stronger since that was changed but still will not start, even with starting fluid in the throttle.
Any ideas what to try next? From searching the web most people are saying crankshaft position sensor or the PCM. Another thought was the ignition switch but not sure how to test any of these to see if they are good.
Also worried that if the wire came out of the positive battery, could it have shorted out the link and fuse and possibly something else but don't know where to start to figure it out. A friend told him it appears that it may have gone into some type of safety mode since there is no spark or fuel.
Any suggestions would be appreciated. Sorry for the long post but I wanted to get all the details out.