No PATS light

[Jadday]

Hi everyone,

I've been having a "no crank no fuel situation".

My 2001 Ford Ranger 4.0 automatic was running without any issue. Went to a store then it wouldn't crank anymore. Towed it home and starting to diagnose. Found out the following:
- Swapped the starting relay, no crank. Then I took the starter relay out and jumped it with a wire and the car cranks but won't start.
- I do hear the fuel pump run a few seconds when putting the key to on position (normal). But then I don't hear it anymore.

I've also checked the cables beneath the starting relay. Found out that the positive is receiving signal but the negative wire is not receiving signal (ground). If I remember good it was the blue/orange one and I've read that it comes from the PCM.

What I'm thinking now is that it has a problem with the PATS system. The problem I have is that the "Theft" light will not come on at all... No blinking, nothing... So, I can't find the code (if there is one with the PATS) it's giving.

Can this be a ground issue? Or a fuse that needs to be replaced?

Any help will be much appreciated.

 

[Jadday]

Update: Solution

Went to try to start the car at night. Due the darkness I saw the theft engine light barely blinking, it was very dimmed. So, I did count the blinking and it was code 11.

This code is about the "Pats Transponder Transceiver/Antenna" that is having issues not connecting/talking with the PCM.

I went to the dealer and they don't have it in stock. Went to the junkyard and found one from a Sporttrack (not sure which year it was). Was pretty much the same technically outside but the parts number was not. Mine was 1L5T-15607-AE and the one I found was 3W1T-15607-AA. Everything looked the same except the plug. It had a green plug instead of a grey one. Got home, replaced the 4 wires of green plug with the grey one. Installed it and it started with the first try!

Had to share this and hopefully it might help someone here.

 

[Kira]

5 months 11 days after.....
So the green and grey plugs were shaped differently? The wire colors were the same?

 

[Jadday]

Yes, the colors are red, white, blue and green.