After removing my passenger side head, I've realized that the firewall ground strap next the PCM was not connected to anything anymore.

I've tried searching but every forum I found doesn't actually say where it connects to. I'm putting my engine back together now so I would greatly appreciate any help!

 

The ground strap that is located to the right of the PCM is connected to the back of the passenger cylinder head. There is a double threaded stud that is used to hold the heater tube to the back of the head. The ground strap is grounded there.

The bigger nut is 13 mm and the smaller nut that tightens down the ground strap is 10 mm.

 

How to get to it ?

 

I believe on my 2007 F150 with a 4.6 the ground connection is at the trans fluid dipstick bracket. As stated above the double stud is on my trans bracket.
That ground connection is very important - did you truck run with this disconnected?

 

I have 2009 f ford f150 lariat. I noticed it disconnected but it was running for awhile but now it doesn't start at all I changed my throttle body and my alternator and my serpentine belt with no difference I even changed my ignition switch still nothing so I'm thinking it have to be the ground strap or my crankshaft position sensor, I hooked it to a scanner and getting a lot of no communication cods like U0100 and U2013 and U0253 and U0155. It's been almost a month and I can't figure out what is the problem. If you can help me it will be much appreciated

 

I am not surprised you are getting a lot of communication codes. I did not think the truck would run without that ground connected. BTW you can connect the ground to any metal portion of the block and that should work. For testing purposes you could just run a wire to the firewall

 

I am not surprised you are getting a lot of communication codes. I did not think the truck would run without that ground connected. BTW you can connect the ground to any metal portion of the block and that should work. For testing purposes you could just run a wire to the firewall

 

I just tried that with a jumper wire still no start

 

How do the ground wires down at the fuse box look? Connected and secure? What's your rust situation?

Describe your no start condition in detail.

 

I cleand the battery ground wire and other ground wires just to make sure. The truck have a lot of rust underneath as I live in Buffalo NY. When I try to start it all it does is the starter motor spinning without engaging, the serpentine belt doesn't move at all.