Help: 2007 No Crank - Ford F150 Forum - Community of Ford Truck Fans
Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 2004 - 2008 Ford F150
Sign in using an external account
Register Forgot Password?


Help: 2007 No Crank

Reply
 
 
 
 
Thread Tools Search this Thread
Old 03-07-2015, 11:34 PM   #1
Junior Member
 
Join Date: Mar 2015
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default Help: 2007 No Crank

Ok, guys, I need some serious help here. I've searched the forums for days and I'm not finding my exact problem; if I'm wrong about this, please link to the fix for me.

History:
I backed the truck into the driveway, one week later I came out to drive to work, no crank, only clicking in the fuse box

I checked the battery, charged it, and confirmed the load with a load tester. Checked and cleaned all connections from battery down through to starter. CAN jump wires at start relay location in fuse panel to kick start over. CAN NOT get codes from computer, just getting error from scan tool.

Oddities; when turning the key to the run position, the ignition switch puts 6v-8v to the starter relay, lights go out, speakers do not output sound. When I turn the key to start, the ignition switch shows output (the wire that goes the to DTR) goes up to 12v, but it does not make it to the starter relay, it stays at 6v-8v. The schematic for this truck shows that the blue/orange wire should be hot when in start on the DTR plug, but it doesn't not get anything down to it, however, we do continue to get the 6v-8v to the [85] side of the relay even when the DTR is unplugged.

We've done tons of tests, but I'm willing to redo any that we need to.

Please help, it's been weeks trying to get this truck up and running.

thank you,

Daniel
Pantera61 is offline   Reply With Quote
Join F150 Forum

Join F150Forum.com Today - It's Totally Free!

Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that F150Forum.com is a great community to join. Best of all it's totally free!

Join F150Forum.com Today! - Click Here JOIN FOR FREE


-->
Old 03-07-2015, 11:46 PM   #2
Junior Member
 
Join Date: Mar 2015
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Oh, some additional data:

4.6 liter
Automatic
F150

Checked all fuses, swapped multiple relays

Quote:
Originally Posted by Pantera61 View Post
Ok, guys, I need some serious help here. I've searched the forums for days and I'm not finding my exact problem; if I'm wrong about this, please link to the fix for me.

History:
I backed the truck into the driveway, one week later I came out to drive to work, no crank, only clicking in the fuse box

I checked the battery, charged it, and confirmed the load with a load tester. Checked and cleaned all connections from battery down through to starter. CAN jump wires at start relay location in fuse panel to kick start over. CAN NOT get codes from computer, just getting error from scan tool.

Oddities; when turning the key to the run position, the ignition switch puts 6v-8v to the starter relay, lights go out, speakers do not output sound. When I turn the key to start, the ignition switch shows output (the wire that goes the to DTR) goes up to 12v, but it does not make it to the starter relay, it stays at 6v-8v. The schematic for this truck shows that the blue/orange wire should be hot when in start on the DTR plug, but it doesn't not get anything down to it, however, we do continue to get the 6v-8v to the [85] side of the relay even when the DTR is unplugged.

We've done tons of tests, but I'm willing to redo any that we need to.

Please help, it's been weeks trying to get this truck up and running.

thank you,

Daniel

Last edited by Pantera61; 03-08-2015 at 12:17 AM.
Pantera61 is offline   Reply With Quote
Old 03-08-2015, 09:22 AM   #3
Member
 
Join Date: Dec 2014
Location: Toronto, Ontario
Posts: 77
Thanked 16 Times in 15 Posts
Feedback Score: 0 reviews
Default

Could it be acting like this?...

The activating part of the relay is 85 and 86. 86 gets its signal from the key then DTR 12V+. The 85 gets a ground signal from the PCM. If the PCM detects a problem it won't provide a ground signal to 85.
30 terminal is live 12V+ all the time. 87 terminals goes straight to the starter. These two circuits 30/87 do all the heavy lifting.

Does it start when you crank it manually?

Check the two big connectors for corrosion on the outside of the frame rail under the drivers seat behind a plastic panel. It sounds impossible that the problem could be there but the PCM needs input from some of those wires in order to provide a ground to 85 on the starter relay.
__________________
Check my car building blog; http://jimdinner.wordpress.com

Last edited by jdinner; 03-08-2015 at 09:26 AM. Reason: adding stuff
jdinner is offline   Reply With Quote
Old 03-08-2015, 05:38 PM   #4
Junior Member
 
Join Date: Mar 2015
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Actually, just found the problem, I noticed a frayed ground strap and then some more wires.

A squirrel got down in there and chewed the harness, the ground strap, and the windshield washer sprayer tube. I'll have to remove the battery, the battery box and the dead squirrel and see what other damage that bushy-tailed rat did.
Pantera61 is offline   Reply With Quote
Old 03-08-2015, 06:15 PM   #5
Member
 
Join Date: Dec 2014
Location: Toronto, Ontario
Posts: 77
Thanked 16 Times in 15 Posts
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by Pantera61 View Post
Actually, just found the problem, I noticed a frayed ground strap and then some more wires.

A squirrel got down in there and chewed the harness, the ground strap, and the windshield washer sprayer tube. I'll have to remove the battery, the battery box and the dead squirrel and see what other damage that bushy-tailed rat did.
Well that was unexpected...
__________________
Check my car building blog; http://jimdinner.wordpress.com

Last edited by jdinner; 03-09-2015 at 10:21 PM.
jdinner is offline   Reply With Quote
Old 03-08-2015, 07:42 PM   #6
Senior Member
 
powerranger262's Avatar
 
Join Date: Jun 2011
Location: Hartford, WI
Posts: 2,887
Thanked 265 Times in 214 Posts
Feedback Score: 0 reviews
Default

At least the little bastard is dead, one less problem.
__________________
2007 F-150 SCREW 5.4L 4wd
K&N drop-in, Pioneer AVH-3300BT, Kenwood 6.5 components, Infinity coax., 800W Kenwood to JL Stealthbox, MBRP XP Series, Drilled/slotted rotors, Bully Dog GT, 2.5" HBS level, Advance Cover, Weathertech liners, 325/60/18 Terra Grapplers, EZ down tailgate damper, LED swap, LED puddle lights
powerranger262 is online now   Reply With Quote
Old 03-08-2015, 07:42 PM
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT -4. The time now is 07:23 PM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.