Join Date: Aug 2013
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
No crank, fuse #22 blown, #320 relay
2003 F350 with 6.0. I was cruising down the road when the engine died. Will not crank over. Fuse #22 is blown. Replaced it and it blew again as soon as the key was turned on. I pulled all the relays out, replaced #22 fuse, turned the key on. Inserted one relay at a time until the fuse blew: relay #302 = PCM. I've removed the air filter and battery and looked for any chaffed/pinched wires, but have not found anything in those areas. I crawled under the truck and looked at the wiring there and could not find anything.
Went to the other side and looked there. I did find a crack in the intercooler pipe hose connector that was blowing some oil out onto the a/c evaporator box and allowing the pipe to wiggle more than normal. The pipe has rubbed through the insulation on the ground cable, but that should not be a problem. No other wiring issues that I can see on that side.
Anyone have any suggestions on where to look next? Could it be a bad PCM? I sold my other 6.0, so I don't have a PCM to swap into this one (It was a 2007 and probably was different anyhow). Suggestions?