Intermittent Stalling Ford F-250 : The Real Fix

we're in trouble now folks we fix this F250 fixed it quora quote then about a month and now I got jenked in on a flatbed the guy says it's still doing the same thing that it was doing of course battery's dead so let's drag out a charger action here and there couple hours drawn full nuclear so we're gonna nuke that thing for a little while get some turds back in a bag quick over and see what's going on according to the fellow and I spoke with him before he took it here is is it was doing the same thing you know it's like to light up you know it sounds like no communication he said he was going to change some relays and do some stuff under the hood so I don't know what he's done um I was pretty definitive with our diet last time if I remember it was the Run start relay or something along those lines and we're losing power to a group of fuses so we're going to look and see perhaps we just got a crap part I can't doubt it but um you know maybe oh first really went bad if this really went bad that would be kind of weird but we're gonna check that row of fuses providing it doesn't start and see you know do we have the same thing where I start right with our same diag and then kind of turn it backwards you know did we just serve a connection by freaking around in there I don't know we're gonna find out before we at least we had a click now we got nothing let's go see if that fuse is dead under the hood teslie it works I think it was this whole row of fuses here yeah those are all dead yeah it was this throw here if I remember correctly all right so that's pretty interesting would we miss here Phyllis there's our relay let me look down inside that box this was kind of weird I went out I see our uh charging voltage was a little high here on the scan tool and because we had the battery charger on a 40 amp right there while it was charging I didn't leave it on nuclear I just do that it'd be funny for you guys but um we had a charging at 40 amps and I see the charging bolts of the world high so I went up to shut the charger off oh hold on a minute here close here folks like I say well check the charger off and put it down on a two amp setting and then all of a sudden I hear everything light up in the truck you also like oh it should start and it started insert so we got it inside I'm just out of curiosity so perhaps was I creating a problem having uh too high a battery voltage well I've never seen that before um maybe we just got lucky maybe it's a terminal fitment issue down in there okay I got a few questions for myself at this point let's go see what's up [Music] we'll make sure the key's on so I guess we're going to kind of disregard that for a moment I don't want to sit here and keep nuking it um the volt meter on the alltels are anywhere from a half to eight tenths of a volt off maybe it's just a big old coincidence but it sure seemed I mean it was like the second I clicked it from 40 amp down to 2 Amp so maybe coincidence but kind of interesting I did take so you know we hear the clicking going on over there you can see I took that terminal and I tweaked it just a little bit and then when I stuck that in I did get you know this whole row of fuses to light back up this is our Run start relay of course you know we're causing all kinds of issues in there pulling that in now let me find my test light and check and see I guess we have this it's this row of fuses right I haven't looked at any diagram I'm just trying to pull it off memory I haven't even edited the video that we made a month ago not sometime back in February I think it was now we're actually I think it was a month ago to the date because I looked when he called it's February 23rd when we did the first one and I think it's March 23rd today or March 24th so yep so now these these are all dead foreign [Applause] [Music] kind of foolish here but let's just see okay so we have power oh this is interesting I'm not losing it here so this is a one of the powers for the load side okay but on the control side of this relay I mean one of these legs should have power one should have ground and I only have power on the load side that's that's very interesting okay we would we would have checked this last time we would have checked I know for certain if we had if we were missing power or control okay so maybe I'm just barking up the wrong tree by uh by tweaking on this okay I always think of maybe pin fitment issue or something but I would have thought we would have checked that last time I can't remember for sure but it appears that we're missing power on one of the control sides here load side you got big terminals we got power on one of them of course then when it relay turns on it you know jumpers through but I say at this point we get a diagram see maybe by taking that in and out maybe something inadvertently turns off but you know who controls this uh relay let's find that out I'm curious just a second yeah so right now I have no control of my windows either and I'm assuming if we stick this back in make sure you guys are in a safe spot I think you're safe I assume we have a no start okay yeah so we have a no started again we're kind of back to where we were outside but thankfully we're inside so that's good Hallelujah and we've also discovered it appears that we have no power on the control sign okay so I think it's a different you know similar symptom different problem with more symptoms AKA like none of the windows and none of that crap work but I yeah I'm pretty sure last time they did semi-observant I thought I would notice that hang out let's get let's get cranking we'll hook my uh before I hook up that wiring diagram I've got this brand new tool I've never even used it yet I just literally just got it uh it's the AES wave you activate and it's a it allows us to do relay testing outside of the box so if we're up to ground here this is going to allow us to manually activate the relay that was there so we have no power there but we should be able to turn this on okay and we can we can feed power you know simulate turn the relay on and off but it allows us it's kind of neat gets itself out of the box and it's got a current loop on here if you want to measure current flowing through 30 and 87 or 30 and 87a and then it allows us to measure the control side too 85 and 86 so on a relay typically number 30 pin 30 is your full-time power it's going to be the the load for it's going to be the power for the load side of the relay so you know when it's Maxi fuses it goes into pin 30 and if it's a five pin relay you're gonna have pin 87 which is going to be when the relay is activated and pin 87a when the relay is you know turned off that's which way the power flow goes so when we flick this on we send power from pin 30 to pin 87. light this up okay when the relay is functioning normally pin 85 or 86 one of those two is going to have power I don't know if there's any standardization to that or not but I've seen it both ways one's going to have power and one's going to be groundside switch in this case so let's see if we have our ground site control let's just find out what all we're missing so I'm going to hook my test light to a power source here yeah be careful with this because you don't want your vice grips to fall over into something let's see okay we have ground so let's just try pin 85. okay our test light lights up so that should come on and off with the key I'm assuming because that should be our control wire because the other one here yeah so that's going to be our control so if I shut the key off I'm assuming that's going to go off and it does so key on Dr P9 so our relay is receiving control however we are missing power on the control side so we're back to where we started but I just wanted to show you that tool that way there you guys can see what kind of testing we're doing outside of the relay box we're missing power here and we need to see where that comes from we can certainly jumper power to this being unfamiliar with the tool I don't know if that's a great idea I can't see why it wouldn't be I just thinking out loud here um but before we do that let's grab a wiring diagram and see where is that power for the control side supposed to come from and is that related to any of the other issues that we're having I'm assuming it is wiring diagram sets fuse number 45 so let's look in here let me just get this oriented correctly so we're not Ford fuse boxes can be kind of confusing sometimes let me just figure this out I think it goes this way [Music] okay yeah because we put a little white paint marker on there for that relay okay so cues 45 is supposed to be this one right here 47 46 45 let's see if it has power on it our test light still works [Music] oh and it does okay let me make sure I'm under eight fuse 45 yeah so we've got this relay well that's curious isn't it um because that has power I want to make sure that I'm in this thing the right way yeah we are okay so all right well let me double check my wiring diagram but uh if this is the case we should have power here [Music] and we don't I'm gonna double check my wire diagram but if that's the case then the problem's in the bottom of the fuse box it would have to be there's got to be a loop of wire because I think fuse 45 let's go look on a diagram because that's the Run start relay this brown with violet we know this one works because this is a control side that's the ground side of the relay this is what we're missing right here bring it down around town fuse 45. why would fuse 45 be a 10 amp fuse and all it does is run the control side of a relay um I mean that would need to be like a one amp circuit because this really is insignificant it's nothing so that's weird I we have to follow the facts I'm going to double check an oem diagram to be sure but according to this we have a broken wire between here and here or the other thing we could have is just crappy pin fitment and Infuse number 45. let me set you down uh which one was 45 again this one you see our fuse is good but yeah well it looks pretty dang nice from up here yeah I don't see anything I don't see any weird Monkey Business let's go I'll just wiggle this fuse just for pooping laughter here yeah yeah that's got to be broke under the box let me double check an oem diagram well we might be opening Pandora's Box here but I think give it the old cows try follow the facts baby um I've unhooked the battery not super familiar with Fords I don't know if we have enough room if we unhook the battery cable going to this if we're going to have enough room to flip it up and do what we have to do uh so I'm not real sure but let's uh grab something I guess grab nothing I was gonna grab a screwdriver but it looks like the tabs kind of pop up down there almost here yep I think I'm gonna have to unhook the battery cable here passively okay I can't really tell um tell you what it's not keeping you guys here in suspense I'm going to fiddle with this thing for a while to see how how we can gain access to whatever we need to gain access to [Music] I don't really know um it just feels kind of tight I see how the wires come into it here but I don't really quite understand how it comes apart quite yet so let me fiddle with that it looks like maybe I could take the bottom case off I'm gonna hook the battery cable because that might be holding us and then I'll come get you guys once I kind of get some things figured I'll explain to you what's up tell you what boys [Music] the most unreliable least longest lasting truck on the road but God dang they don't do stuff that's freaking stupid um this is just assining folks this is all one piece of the entire harness it's non-repairable non-serviceable item what a stupid freaking design even Chrysler knows this but I tell you what you can get it out get it this far top of the morning to you [Music] motherly lover dude that pissed me off latches on the back of this box way up under the firewall I don't know what you're supposed to do I took the air box out of the way but give me a break break me off a piece of your KitKat bar I'd like to find that engineer that freaking made this thing what's married with a good old connector dude oh look at that that's been quit piss and moaning pink there's a broken wire staring us right in the face or at least a broken wire let's see where's it run to on the reviews gray with the red stripe I'm pretty sure I remember that from the diagram nobody's ever been in here everything that taped up there was no tabs broken so this is a Hokey Pokey right from the factory defect in The Wire um fortunately there's enough wires sticking out there we should be able to get a crimp and seal connector on it maybe maybe let me go get a pair of wire strippers and I just tell you what stuff like this makes me hate my job calm down so what I'm wondering well first of all this is let's admit this is super bizarre because [Music] I'm gonna have to go back and watch the first video I mean I know I lived that moment but I don't recall right offhand there's no way I misdiagnosed this the first time and was losing power on I don't know maybe I did maybe I'm an idiot I I would have checked I know I would have checked for power on the control side I don't know maybe I won't publish any of these videos they're both stripping before anybody asked uh these are the snap I call them the Hammerhead strippers allowed to get in there straight that's part number from Snap-on maybe this is all my fault maybe I should just give up [Music] not be a mechanic anymore I'm thinking we're gonna have to solder this one because I'm not so sure I got these wires stretched so freaking tight right now I don't know if I can get in here and do what I got to do with the crimper I know I can solder them but let's see if we can get in there get her crimped off we'll be good I have to charge over there on two amps but I know it sounds like ridiculously loud and the camera I'm gonna slide that baby down on there let's see if we can't get in here to give it a proper crimp I think I totally missed oh I didn't feel like a real idiot if I misdiagnosis because what are the odds really out of the hundreds of circuits on the car to have the same circuit had the similar problem or the same problem I think the no crank portion of it there uh must have been just a strong coincidence where there's two issues that seems kind of bizarre that's still in my mind this thing's still in my mind let me go get something to heat that up with a little Saturday it's got a little heater tip on it here so we can heat this up without melting everything else in the Box all right she's all melted and solidified this thing will probably go back together easier it came apart but there's about three zip ties that are not getting put back and they're one of them's way down here on this lower plastic tree where the harness comes up they're all zip tied one up here I might put back but this harness is all zip tied to all the plastic because it's supposed to be you take this out and you throw this whole thing away and replace the wiring harness is how it's supposed to be done but one thing we have to be cautious of and I have to be cautious of this is the wires here to make sure that they're when I click it back onto the bottom half of this tray that they're not going to get pinched so I'm going to work on that I'm gonna do it off camera then I'm going to swear it a little bit and uh I don't want to do that on the YouTube so let me uh get after this thing we got a fish back down in there put that relay back in flow through it should start just fine now thank you let's get the girls got no exhaust on it inside here oh what do we do with the lid for that thing give it flying lessons oh no here it is let's stick this back on there I was able to get that bottom all back in and click down it's just a pisser because I mean everything is just so tight you know there's no uh no room back in there to do anything probably if you took the brake booster out it'd give you a little more room flip it around but why don't this lid want to go on now I'm curious to know if I misdiagnose it the first time or it was just a situation like the whole battery charger deal you know every time we checked it everything was there that we needed I don't know you've been driving it for a while so whatever it's fixed now I'm done we're done thanks for watching foreign [Music]

Channel: South Main Auto Repair LLC

Views: 219,441

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Id: iPq_LSw0V_o

Length: 23min 37sec (1417 seconds)

Published: Tue Apr 04 2023