T350 Electrical Problem

[martin996uk]

Hello everybody. I hope somebody with automotive electrical know-how can help me out here. I managed to get moisture or water into my fuse box or somewhere in the electrical system. Sometimes the fan stays on with no ignition or the dash pod stays on with no ignition. If i just tapped the offending fan relay the fan would stop. If I took the dash pod fuse out and then put it back in the dash pod would stay off. I’ve put up with this for a few months now. It didn’t happen every single time I drove it. Just every now and again. Anyway, I decided to use a compressor with an air gun attachment and try to blow out any moisture in the fuse box. Then I drove off. About 3 minutes later the car cut out. I couldn’t start it. It would turn over but not start. I realised that the fuel pump wasn’t priming. I managed to push the car to a safe place. I got hold of a cheap 5 pin relay from Halfords in the same formation as the correct fuel pump relay and plugged it in. When you turn the key the fuel pump and the power steering pump continuously runs. It doesn’t stop after 2 seconds. The car starts no problem. I have since bought the correct fuel pump relay and plugged that in. Nothing happens. The fuel pump does not prime. The engine will turn but not catch. It will only start with the cheapo Halfords relay. Apparently it’s not good for the fuel pump to continuously run after you turn the ignition on. I took the fuse box out and completely took it apart and cleaned every single contact and dried it out. I put the fuse box back in the car but I’m still getting the same problem. What on earth could be going on here? How can I start the car with the wrong relay and not the correct relay? What should I be checking for to rectify this situation? Any help would be greatly appreciated.