blown fuse22, replaced, dead engine

[arriero4x4]

Hi guys,
Yesterday I had a really bad day. I went camping to a beach next to nowhere, and guess what. My truck left me once again. I have a 6.0 2003 PSD 4x4 CC SRW. The engine died because a blown fuse. I checked and saw that was fusee 22, Engine control. I moved and checked every single plug, replaced the fuse and prayed. And it worked, for 15 miles... Then, the fuse blew again. It happened when I was driving in sand with some bumps. I replaced the same fuse again and it blew. The third time it didn't blew, but the engine didn´t start. I have full battery. I can't hear the fuel pump working, no sound. When I put the key in "on" position, everything looks fine except there no Fuel pump sound. When I turn it to Run, everything shuts down until I put the key back in "on".
At last, I had to tow my truck with an old Unimog from a fisherman, and then transport my truck on top a ramp.

Any advice on what can this problem be? Where to look? I read that it may be a bad sensor. The thing is there no place where I can connect my truck to a scanner.

Thanks a lot. On monday I´ll upload a picture to show you guys where I was going and how I save my truck.

arriero

[mhatlen]

Check the wiring harness going down to the HFCM and look for chafing and any damage to the plug. Sounds like you may have a bare wire grounding out to the fuel pump.
Its under driver side door on the frame rail.

[arriero4x4]

I´ll checkit tonight. Thanks. I had to travel more than 500 miles to get to my scan tool. I hope that it tells me whats happening.

I´ll jkeep updated.

arriero

[arriero4x4]

I just used the Autoengenuity scan tool and showed:
GEM/Central Timer
P1832 Transfer Case Differential Lock-Up Solenoid Circuit Failure
Hybrid Electronic Cluster
U1073 SCP (J1850) Invalid or Missing Data for Engine Coolant
U1059 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
U1058 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
U1262 SCP (J1850) Communication Bus Fault
U1027 SCP (J1850) Invalid or Missing Data for Engine RPM Overhead Trip Computer

Any idea where to look to resolve this issues?

I tried disconecting the Fan clutch sensor and the fuel heater and nothing...

[mhatlen]

Have you looked at the harness going down to the transmission may have hit the exhaust pipe.

[arriero4x4]

I checked it last night, look fine, no melted points nor bad connections...
The fuse is not blowing, those are the codes and there is no sound coming from the fuel pump under the drivers seat. I put my ear next to the fuse box and when I put the ignition in run, there a click coming from a relay. Thats normal?

thanks.

[mhatlen]

There is another rub point under the air filter for the harness I would look there too. If you have a volt gauge pull the plug going to the fuel pump and see if your getting 12 volts at the plug. You can also meter out the fuel pump itself if it has a burned motor there will be no resistance to it.
You may have just lost the fuel pump, checking for power at plug will tell you.

And yes the fuel pump relay will click in the cab.

[arriero4x4]

I just checked the fuel pump. The pump read 0 ohm, so its ok, but there is no 12V in the plug. I checked the fuses and are all good.
Any ideas where to continue checking?

thanks
arriero

[arriero4x4]

Checked the fuses again, I forgot to check some with the ignition ON. The only weird reading is the trans range sensor is 4.6V. Is that normal or should be 12V? everything else looks fine.

[dannyboy950]

I would suspect somehing wih the tranny selector switch. If the neutral safety circuit is shorted you will get no fuel pump also if the anti-tip over switch can be tripped breaking the fuel pump circuit.

To really trouble shoot this you will need a good wireing diagram.