Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hello I will help you with your question,
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I don't get to see what you are seeing, can you explain or link to the thread you asked about?
I don't have enough information to help you with this so I will OPT OUT and another expert will pick up your question.
Sorry I could not help
hello, I to cannot see the link you are talking about but if you would explain your problem to me I would love to help you.
Sir please forgive me in that I cannot see any of this my apologies for that I do not have the ability to view that. I gather that you have some sort of electrical issue and if so that is my specialty.
Very well sir, I will opt out and wish you good luck.
I apologize you have given me the info hold on I will break this down for you
Okay I have looked at my notes, It appears we have had this alot. And sir I understand how aggravating it can be when you have a problem and you have to start over and if you still want to find someone who can view that link just say so and i will opt out again. I will say this when it want crank does your odometer display this where the mileage would be -------------
If so your problem may be where we have had a number of them. The central junction box it burns out and will not give the power to the pcm that comes from the pcm relay, I mostly fix it by externally wiring in a relay for the pcm. Again I hate I cant see the link and completely understand your frustration. Let me know
Okay what happens is the circuitry inside the box that sends the power from the pcm relay burns out. The process goes like this you would purchase an accessory relay i use the 20amp version. All the parts stores have them. Also you will get the socket for the relay it will have about 6 inches of wire. There are four wires actually 3 we would worry about. We would cut the wires as they went into your box and wire them into your new external pcm relay. And yes the box goes out quite often for fuel pump and pcm. IF you want I can pull the wire colors and locations and further tell you which terminals on your new relay to wire them into. If so let me know i will do it tonight for you, first i have to run check on an elderly lady from my church who lost her husband about a month ago but will be right back.
yes i will get you all that
stomer Concern:No start, no crank and the odometer shows "------" with the ignition key on. The Powertrain Control Module (PCM) will not communicate to the scan tool.
Average Reported Mileage:145331
Tests/Procedures:1. Check fuses 32 (15 amp), 33 (20 amp), and 34 (20 amp) of the Central Junction Box (CJB) for battery power with the key in the run position.2. If these fuses have no power, remove the PCM power (#203) relay in the CJB and inspect the connection of the relay to the relay holder. Address any noted issue.3. If the PCM power relay looks to be ok, check for two terminals of the PCM power relay to have battery voltage with the ignition switch in the Run position. One of the terminals is actually hot-at-all-times power and the other terminal powers up from the ignition switch through the PCM power diode, which is internal to the CJB.4. If power is present on both terminals, swap the PCM power relay with another relay. Then, recheck for the odometer display to show the mileage when the ignition switch is turned to the Run position. Replace the relay as needed.5. If power is good on the RD wires feeding the injectors and PCM, check the Vehicle Reference Voltage (VREF) feeding the Throttle Position (TP) sensor to verify it shows 5.0 volts. If this voltage is low, disconnect the 3-wire VREF sensors to determine if the VREF value will return to normal indicating a shorted sensor.6. If the VREF circuit voltage is low with all VREF sensors disconnected, locate the two VREF circuits at the PCM and cut them to determine if VREF returns to normal on the PCM side of the circuit. Then address the circuit for a short of the harness.The two VREF circuits of the PCM include the circuit at pin 36 of the C175e (middle) connector which supplies the sensors on the engine, and pin 45 of the C175b (passenger side) connector which supplies the Fuel Tank Pressure (FTP) sensor.
That should take care of the diagnostic process. And your right we don't want to modify your wiring unless needed. But around here we dont like to buy 700 dollar fuse boxes. Lol. You run those checks and if it is your problem I will draw you up and walk you through the modification. Which in my opinion is better because the relay we use is cheaper and available in every parts store and will be easy to replace. But before we go to the trouble of making the preparations lets confirm it. I will be waiting to hear from you, oh and sir,
thanks for being patient with me, I promise you we will fix this.
Customer Concern:The engine will not crank over, jumping power to the starter allows the engine to start.
Average Reported Mileage:149490
Tests/Procedures:1. Check fuse 21 in the Central Junction Box (CJB) for power. This fuse should be hot whenever the key is in the START position.2. If OK, check power (from fuse 21) on the Dark Blue/Orange (DB/OG) wire at the Digital Transmission Range Sensor (DTR) when in the START position and power out of the DTR on the Tan/Red (T/R) wire that goes to the starter relay.3. If the DTR checks out OK, check power on the T/R wire at the starter relay when in the START position. The relay should click and then power should be applied to the Red wire that goes to the starter.4. If the relay does not energize, verify that the relay is properly grounded. If OK, replace the relay.
Another method of checking if pcm relay checks out.
Thank you sir. I am confident we will have this resolved tomorrow. I will be at work but will keep checking in to see if you messaged me. If you need any help at all just hit me up. Until then rest well.
No sir you are not doing anything wrong congratulations you have found your problem, what you are checking is your voltmeter one lead to ground and the other on the 5 volt reference we check this because it is a sure fire way of verifying our computer is down. And with .013 we have no 5 volt reference.
That is actually the first thing I check if I don;t have a scan tool. Which would show no data.
The tps you can check the maf sensor, same color wire. See if you have 5 volts there. I have seen this so many times. Jeeps and chrysler are having the same problem with these intelligent fuse box.
No sir. I'm sorry couldn't get on here last night we had flooding here no onternet. No sir ae just got to run us a relay or u can replace the junction box
I will sir if okay bear with me for hour or so we are unusually busy here today, and one of my techs is out sick. I will have you a detailed description drawed up over lunch
The supplies we will need will be an accessory relay, that is what parts house calls them. And the connector for that relay the relay will have a little bracket attached you can mount it but it doesnt have to be. And ideally i like to see the wires soldered and heat shrinked but butt connectors will do
IF it is not to much trouble it will make it easier don't remove it just unbolt it where you can pull it out to gain access to wire more easily
Sir please accept my deepest apologies. I received the opportunity of a lifetime I got to go to las vegas stayed for a week had the time of my life and it was all paid for. I got the word suddenly and didnt have time to properly prepare. I know that is not what you need to hear. I hope my actions havent caused you to look negatively on just answer. If you havent fixed this yet let me know cause I have the paper drawn up for you.
So i did help you fix your problem? I didnt ignore you, lol. I got word on the afternoon we last talked "pack your bags" I got sent to Las Vegas caesars palace was there from tuesday to yesterday. Seen and done it all, and if you knew me you would be laughing right now, I am just an ol country boy who aint been to far out of alabama. And a vacation like this would not be possible for me, so turning it down i couldnt do. However I do regret the effect it had on some of my customers on here, I hope you will consider using me in the future. And i hope this doesnt make you angry is there anyway you would consider a positive rating? Again I apologize and I can promise you this will never happen again. My head is still spinning from this trip. I am glad your truck is fixed and your right due to the fact you had the other problems replacing the cjb was the right thing