[SOLVED] Engine won’t turn off, 4wd issues

[Frenchy]

Who gets to pay for the PCM if it isn't the problem?

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[sandy_koufax]

Who gets to pay for the PCM if it isn't the problem?

Not me. It’s all being billed as warranty. I don’t care if it’s the dealer or FoMoCo.

 

[Dereku]

this is a crazy problem. Sounds the the dealer screwed something up or the short that caused it to pop into 4L also fried the PCM. I have had one PCM fry in the past. All my fault and it caused so many issues.

 

[sandy_koufax]

They made me go find a second key and drive it to them in the middle of a workday. They said if I don’t I’d need to pay $225 for a new key because the new PCM needs two keys. Surprise surprise. The new PCM didn’t fix the issue. A relay is staying energized.

Now they’re saying it will take up to another week to find the issue and trace the problem. They refused to just replace the parts (which frankly aren’t that expensive). I feel like throwing a chair off a rooftop bar. I’m getting so frustrated. I just want my truck back. It’s over 4 months now.

 

[airline tech]

It should take less than 1 hour to find the problem, if it is on that circuit, which I strongly believe it is.

 

[sandy_koufax]

It should take less than 1 hour to find the problem, if it is on that circuit, which I strongly believe it is.

They’re claiming they were able to replace just the 4WD relay and that fixed the issue. I’m picking it up tomorrow. We’ll see.

 

[TJC]

If it’s not actually this issue, well I don’t care, I’ve decided this is the issue and that’s that. I’m not picking up the truck until it runs like a 3 year old 33k mile union made truck should.

I hate to say it, but it is running like a modern 3yr old 33K mile union made Ford Truck. The more complicated the plumbing, the easier it is to stop it up!

Many of us are having different unique issues, some very serious, and a lot not so serious that are simply overlooked, or repaired at home. I have 20K miles on my 2020 Ranger, and I am leery of driving it too much before I sort out the transmission issues. I have never had this lack of confidence in a new vehicle before. I actually trust my 19 year old 2005 Ranger with 165K miles on it more than I trust my 2020 Ranger. I am hoping I can remediate the transmission issues soon without involving Ford.

And Airline Tech is a diagnostic marvel!

 

[airline tech]

I am on the fence here: and it depends on if the (1) Relay 4WD, which all the documentation and manuals show that it is (Non-Serviceable) and integral to the BJB.

So, if we back up to my post #25, this was my very first thought. But then reevaluated the issue and stayed on the circuit but more attention to the wiring to it.

So, if they replaced the 4WD-Relay, then it is indeed replicable without replacing the whole BJB.
However, it is not shown or depicted in any manuals as such.

If they replaced either the 4WD (CW) or (CCW) relays and calling it good, I do not believe this will fix the issue as you had both of these relays removed, it fixed your (no shutdown) issue momentarily and it returned.
There is no way for power to jump across those relays unless installed. (Or wiring issue)
We have proved that by removing and reinstalling those (2) relays will affect the outcome., and if with those relays removed and the issue did not return, then I would have recommended a deeper look at those for testing and or replacing both.

We are indeed on the right path for a permanent corrective action.

I would ask the dealer (IF) any wiring checks were done to confirm or are they just shot-gunning a part at it. Since they just shot-gunned an expensive PCM at it, I am assuming the answer is a big fat (NO)

 

[sandy_koufax]

Every day I wake up expecting nothing and I’m still disappointed. Today they told me the truck isn’t ready for pickup because it seems it needs a new battery junction box. Airline Tech, you were right. But get this, they’re saying it’s not a powertrain warranty part and want me to pay $1,100. FoMoCo Customer Care told me not to worry as they’ll pay for any surprise bills, but this seems like it really should be billed under warranty since the issue came up on the 35th month of warranty. Its ridiculous they can essentially say “well the issue wasn’t resolved during the warranty period so you can go **** yourself”.

 

[sandy_koufax]

@Airline_Tech was right. (if you DM me which liquor store you prefer, I’ll buy you a case of beer). They replaced the battery junction box and 4 days later truck has no issues. Kinda sucks they threw all these parts at it (BJB, PCM, 4wd motor, transfer case, driveshaft bearing) and the carfax will reflect that. Im beginning lemon law proceedings now. If they offer me $20k I’ll keep the branded lemon since it will be practically worthless. Otherwise I will make it my life goal for them to buy it back.

 

[airline tech]

No worries, glad they finally fixed the issues, just pay it forward to someone in need.

I think the only part that was truly not needed was the PCM.
The rest of the parts tie together and would be better for you (in the end) that they were all replaced.

Which specific part failure snowballed this IDK for sure, but my guess is the BJB due to the fact that it contains the controlling relays as that would be a factor in the T-Case being able to make it into 4-Low Un commanded and also tie in the other issue of no shut off.

Good Luck on the Buy-Back

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