Hello, I have a 2003 f150 5.4 4x4. Truck was running fine and I jumped another vehicle. After the jump my truck would not start. Tried jumping it and nothing. Replaced the starter and have a slow crank now but engine won't start. Tried jumping again and got it started. Drove it for a couple days with no problems. So we went to the lake with it. Now after sitting for a night it won' start. Slow cranking like a dead battery. Tried charging the battery but didn' work. Bought a new battery and is doing the same thing. Checked my connections to the starter and all are tight with no signs of corrosion. Terminals on battery are also free of corrosion.tried jumping it again to get home but it is not working. Any ideas?

 

This happened to mine, the cable from the starter was burned almost all the way

 

Was thinking about all that has been happening with this truck. The A/C clutch was making noise. Could it be dragging on a seized pully causing a slow crank speed?

 

I doubt it, but you could take the belt off and see.

 

Ok so I took the belt off and the engine cranks and starts. A/C pully is locked up. Found a work around to bupass A/C. Change stock idler pully to Duralast part no. 231015 and get belt 795K6 belt goes on same way as stock just bypassing A/C. Battery is charging and everything looks good. Thought I'd share if anyone else is having this problem. Thanks!

 

Wow, that's awesome. Thanks for coming back!

 

That is great info... i've been considering bypassing AC as I never use it.