× Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

1999 Ford F150 4.6 4x4 no crank, no start

  • tom.davis
  • Topic Author
  • Offline
  • New Member
  • New Member
More
03 Sep 2019 11:38 - 03 Sep 2019 12:53 #33383 by tom.davis
1999 Ford F150 4.6 4x4 no crank, no start but if I take my little test light and touch the starter/ ignition fuse # 21 under the dash the truck will crank start and run. So basically I am grounding out that starter/ ignition circuit when I do this. What does that indicate the problem is?
Last edit: 03 Sep 2019 12:53 by tom.davis. Reason: Misspelled word

Please Log in or Create an account to join the conversation.

More
03 Sep 2019 13:42 #33389 by jreardon
Replied by jreardon on topic 1999 Ford F150 4.6 4x4 no crank, no start

File Attachment:

File Name: 1999fordf1...cuit.pdf
File Size:66 KB


If I understand correctly, you're missing power at Fuse 21 in the crank position?
Attachments:

Please Log in or Create an account to join the conversation.

  • tom.davis
  • Topic Author
  • Offline
  • New Member
  • New Member
More
03 Sep 2019 14:18 #33390 by tom.davis
Replied by tom.davis on topic 1999 Ford F150 4.6 4x4 no crank, no start
no the power is there the test light glows when I touch the fuse and the test light is grounded to the body.

Please Log in or Create an account to join the conversation.

More
03 Sep 2019 14:24 #33391 by John Curtis
Replied by John Curtis on topic 1999 Ford F150 4.6 4x4 no crank, no start
On both sides? With Key off? Or key on?

Thinking out loud always helps me in the process.

Please Log in or Create an account to join the conversation.

  • tom.davis
  • Topic Author
  • Offline
  • New Member
  • New Member
More
03 Sep 2019 14:43 #33392 by tom.davis
Replied by tom.davis on topic 1999 Ford F150 4.6 4x4 no crank, no start
key in the crank position

Please Log in or Create an account to join the conversation.

More
03 Sep 2019 15:09 #33393 by jreardon
Replied by jreardon on topic 1999 Ford F150 4.6 4x4 no crank, no start
Perhaps it's bad fuse contacts. Instead of using a test light, try pushing the fuse in with your finger while your crank.

Please Log in or Create an account to join the conversation.

More
08 Sep 2019 23:18 #33493 by Southern_Ways
Replied by Southern_Ways on topic 1999 Ford F150 4.6 4x4 no crank, no start
Ignition switch not going to ground in the cranking position (Bad contacts)? Will it do the same thing in the run position?

Please Log in or Create an account to join the conversation.

  • tom.davis
  • Topic Author
  • Offline
  • New Member
  • New Member
More
09 Sep 2019 12:57 #33507 by tom.davis
Replied by tom.davis on topic 1999 Ford F150 4.6 4x4 no crank, no start
no power to the fuse #21 during run but once started truck runs fine. Power windows, blinkers, radio all work fine when Ignition is on.

Please Log in or Create an account to join the conversation.

  • Chad
  • Chad's Avatar
  • Offline
  • Moderator
  • Moderator
  • I am not a parts changer.
More
09 Sep 2019 16:53 - 09 Sep 2019 16:56 #33515 by Chad

tom.davis wrote: no crank, no start but if I take my little test light and touch the starter/ ignition fuse # 21 under the dash the truck will crank start and run. So basically I am grounding out that starter/ ignition circuit when I do this.


If I understand correctly, the engine does not crank when the key is turned to the "START" position. But, if you test the fuse with a test-light like this:


while the key is in the "START" position, the engine will crank, start, and run.

If that is the case, then I second what jreardon said:

jreardon wrote: Perhaps it's bad fuse contacts. Instead of using a test light, try pushing the fuse in with your finger while your crank.


"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
Attachments:
Last edit: 09 Sep 2019 16:56 by Chad.

Please Log in or Create an account to join the conversation.

  • tom.davis
  • Topic Author
  • Offline
  • New Member
  • New Member
More
10 Sep 2019 08:36 #33524 by tom.davis
Replied by tom.davis on topic 1999 Ford F150 4.6 4x4 no crank, no start
I inspected and cleaned the fuse receptacle replaced with a new fuse still the same problem.

Please Log in or Create an account to join the conversation.

  • Chad
  • Chad's Avatar
  • Offline
  • Moderator
  • Moderator
  • I am not a parts changer.
More
10 Sep 2019 17:59 #33529 by Chad
Have you checked farther down the circuit? Do you have power at the DTR sensor, on the transmission, when in the START position?

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."

Please Log in or Create an account to join the conversation.

More
10 Sep 2019 19:58 #33535 by Southern_Ways
Replied by Southern_Ways on topic 1999 Ford F150 4.6 4x4 no crank, no start
Will your test light light if you connect it to the positive side of the battery then test the ground connection on the control side of the relay?

Please Log in or Create an account to join the conversation.

  • Not Allowed: to create new topic.
  • Not Allowed: to reply.
  • Not Allowed: to add attachements.
  • Not Allowed: to edit your message.
Time to create page: 0.786 seconds