2015 fiesta electrical issues no crank no fuel pump

[Fuelsmoke1]

I'm going to go over fuses again tomorrow. I can't remember if I only checked fuses with multimeter or if I checked them with a test light. I may have only checked across the fuses with the multimeter. I'm going to double check everything tomorrow and see what works,what doesn't, etc. I'm hoping to figure it out. Tomorrow is pretty much the last day I'm putting into it. I will pull the power distribution box under the hood and see what's going on there. Id love to get it fixed but I've already put a lot of time into it and I no longer need the car for its intended purpose anymore as some things have changed.
If I can gain any ground tomorrow I will keep plugging but if I forget anywhere after a few more hours she's headed to never never land 😂. I'd rather save it but I don't have time to keep playing with this thing. I'll keep you posted.

 

[PapaJim13]

I don't want to throw parts at it but I'm getting to a point where if I don't get some sort of results here pretty soon I'm just going to haul it to a junkyard and get my $500 and be done with it.

If you go this route, save the trans and engine for me! Or just the trans.

 

[Fuelsmoke1]

If you go this route, save the trans and engine for me! Or just the trans.

Where are you located? I'm not sure the direction I'm headed just yet but junkyard quoted me $550 for the car. I'm still poking at it but only for a bit this afternoon. If you are close by you could be the new owner today 😆

 

[Fuelsmoke1]

So today I started testing again. Here's what I found. I have the fuel pump relay supply power, and a few fuses related to the PCM and emissions systems that only have 4.2 volts vs 12 that I think they should. The fuses have no voltage when key off, and 4.2 when key on. I have to double check but I think the fuel pump relay had 4.2 whe6key on or off but I'll verify. So if all those fuses in the fuse box under the hood requires 12v, I'd say I have found the issue. Now to find the actual cause. Lunch first 😆.

 

[Fuelsmoke1]

So what I think is going on is that a 12v power supply is actually dead. The side of the fuses and fuel pump relay that I am getting 4.2 volts from comes from the "fused" side of the fuses and the switched side of the relay. So I'm thinking that it's back feeding voltage with key on. I'm pulling fuse box out to see if I can find where the power supply is coming from. I'm thinking it must have a fusible link or simply a corroded connection to the battery lead. I'll keep updating as I find anything

 

[Fuelsmoke1]

I've made some ground. My fuse box issues are in the PCM relay. Not the relay itself, but something isn't triggering the relay. I pulled the relay, I put a jumper wire across relay power and port that would be given power if relay worked. The fuse panel then has power where it didn't before. Fuel pump then activates as well. So at this point, I'm still lacking starter function with the key. I'm giving it a little bit more time being things actually seem to be moving forward. Tomorrow I'm going to try running a jumper wire to the starter just to see if I crank it if it will run. At least if I can get that far I'd feel like I have accomplished something 😂.
I had tested the clutch pedal switch before but at that time the systems weren't powered up like they are doing now. Perhaps I will take another crack at that clutch switch and just jump it to eliminate it as a problem. I understand that there are 2 brake switches, wondering if 1 brake switch brings power or ground to the clutch switch, or are they 2 separate systems entirely?
I feel like I'm trying to take a computer apart to figure out what board has the bad contact that's preventing it from working. These cars suck. What an over complicated pile of junk. I'm hoping to make it run tomorrow. That's the goal. I think I'm close. If I can get starter to function with a jumper and gear it run then I'll know how far I want to go from that point. I'm not really sure if it runs or how well it runs. I was taking the word of the previous owner that it ran. I recall the battery that was in the car wasn't good, and there was a battery charger where she parked the car. I'm wondering if she was boosting the car daily and fried something in the PCM circuits or something?

 

[Handy Andy]

Glad you found the bad relay - this is hard news to know. But what I like is...you stuck with this thing.

It may seem easier to locate and buy another used car, but you then need to remember why you gave up on the last one. The kind of problems you solved when you first got the one - are also going to be, in some way or another - quirks in the next one that you buy - either used or new.

And as were seeing, it's not getting any cheaper...

The Battery charger itself can fry some electronics - but then will hurt the other basic ones because a battery charger on poor connection thru battery cable introduce several problems including the voltage spikes from unloading or load to unloading of the charger - can spike a system and by hearing about the fried relay I hope it's only that simple.
But beware! There are quirks; the older days that the older chargers that were designed for older systems that were more bulletproof by design, are still around, but the newer technology used for their successors require more immersive regulation designs. Remember too the chargers of yesteryear and their level of technology are still around and can be used to start your car if properly done. Plug in the wall or Lithium Ion reserve or exotics in-between the two are here - no matter what - chargers can be a big benefit, but can also ruin your day and even your car if not installed, used and cared for properly.

 

[Fuelsmoke1]

Had to at least put in a little effort. I've had several things pull me away from this car for several months. I don't even need the car at this point. I hope that finding the wiring issue leading to the relay not working isn't too crazy. And I am going to figure out if by jumping the starter, if the engine will fire up with my relay jumped. It has so many codes in it that I would really like to get it to start so I can see if anything actually works. I think many of these codes are from testing things like when I was fooling with clutch switch for instance, there's a code for that and it's one of the more recent ones logged. I wonder how many are from trying to work things when half the system was off. I cleared enhanced codes, 11 of 24 cleared. I'm going to get into it again and clear again and see if it will clear any more. It can't possibly have that many faults, I need to get down to the final few that could be leading me to the finish line.
I'm afraid that there could be some modules fried from the jump starting but I guess we will see how it goes. If I can at least get it to fire up I will feel like that is a victory at this point. Then I'll sell it cheap and show buyer what I have done and they can go from there. At least I can sell it showing it runs and moves, something I can't do just yet.
Hauling it to the junkyard wasn't as much about giving up as it is just not having the time to deal with a finicky issue on a car I don't need and bought cheap. I had a specific purpose for this car and things have changed since I bought it, now it is no longer needed. Now it's just taking up time and space. I have made a little headway with it so maybe I will solve it this morning. But I don't have a lot of time today as I have paying work to do so it's getting a little time today and we will go from there. It may yet go to the great beyond but I'm trying to give it a chance.

 

[PapaJim13]

If I can at least get it to fire up I will feel like that is a victory at this point. Then I'll sell it cheap and show buyer what I have done and they can go from there..

Absolutely would be a victory, I hope it happens! I'm located in kalamazoo MI. I see now that the 13 hour road trip may be a little far.

 

[Fuelsmoke1]

Well I have had success. With jumping the PCM relay in engine bay, and a jumper wire off the starter, I can get it to run but it's not getting fuel. It runs on spray. It has fuel system codes so chances are it has more issues. But it certainly runs good, engine sounds perfect. It's sat here since spring or summer when I got it. Fired up easily with spray. Not a single tick and no smoke.

 

[Handy Andy]

When you get time, read these two threads - it may help you in fixing or at least troubleshooting , yours.

Fuel Issues...
https://www.fordfiesta.org/threads/fuel-issues.9463/post-26653

Fuel Pump reset?
https://www.fordfiesta.org/threads/fuel-issues.9463/post-26653