Engine will not crank, anti-theft

Tiny
JCPHILLIPS21
  • MEMBER
  • 2002 FORD F-150
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 300,000 MILES
I was working on truck had it idling in the yard then all of a sudden it shut off. Now every time I put key in theft flashes rapid for minute then gives code 16. I tried both the main key and the spare key both coded to that truck doesn't work truck just turns over but no start.
Friday, March 18th, 2022 AT 2:56 PM

13 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
This code comes up when the cluster is not working when you turn the key on does the cluster work. You could have popped a fuse which could cause this issue. Let's start with the easy stuff first. These guides can help also I have included the fuse locations:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-reset-a-security-system

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 19th, 2022 AT 4:34 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
Yes, fuse is good, and I tried the little tricks to bypass the pats. Nothing worked.
Was this
answer
helpful?
Yes
No
Saturday, March 19th, 2022 AT 6:38 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
This first started when something was overcharging my battery, and someone reseated the cable and I guess instead of overcharging the battery it sent all those volts to everything else. Someone said that could have damaged the computer could it?
Was this
answer
helpful?
Yes
No
Saturday, March 19th, 2022 AT 6:39 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yep, that can do it, have you run a CAN scan on it? Here is the link:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Please run down this guide and report back.
Was this
answer
helpful?
Yes
No
Saturday, March 19th, 2022 AT 6:53 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
Tool the computer out of its casing and there's a burn spot assuming that's the problem. Do I need the exact same computer for it to work in my truck? And what could be causing the overcharging issue? I've already replaced the voltage regulator.
Was this
answer
helpful?
Yes
No
Saturday, March 19th, 2022 AT 11:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
As you can see from these wiring diagrams the cluster has a voltage gauge that interrupts the charging system so if the cluster is bad, it will cause charging issues. Check out the diagrams (below). Please let us know what happens.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 10:26 AM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
Thanks I'll look into that. Could this be the cause?
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 2:38 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yep, it looks like you may have found the issue, you can fix that by soldering over the break.
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 3:18 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
Really all I have to do is solder over where the strips are broken. To fix the overcharge issue so I need to check all of those wires in that ground for a naked wire.
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 3:39 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
It didn't fix it still gives me theft code 16.
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 6:05 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Does the cluster work now? Also did you clear the codes? This guide should help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 6:59 PM
Tiny
JCPHILLIPS21
  • MEMBER
  • 12 POSTS
Yes, everything on the cluster works other than mileage is all dashes. No, I haven't cleared the codes, I'll try that.
Was this
answer
helpful?
Yes
No
Monday, March 21st, 2022 AT 8:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Okay, please let me know.
Was this
answer
helpful?
Yes
No
Thursday, March 24th, 2022 AT 9:53 AM

Please login or register to post a reply.

Related Engine Not Cranking Over Content

Car Not Cranking? Try This | EASY
VIDEO
Car Not Cranking? Try This | EASY
Instructional repair video
Starter Not Working
GUIDE
Starter Not Working
This guide is designed to help you identify whether the issue with your non-working starter motor is due to an electrical problem or a fault within the starter motor itself...
VIEW MORE