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My take is it that it is in the PCM's / BCM's but up to the end user to implement it, similar to the PTO option. All the transmissions have the feature but you have to specifically order a trans with the access cover.
actually, they all have the acess cover. What you will be missing is the internal drive gear for the pto. I have my customers supply me with their vin befor I order anything for their truck. If the vin does not check out I wont work on them. Most think because they have the cover they are set for the pto. Nope. Cj
Anyone intalled SEIC (High Idle) on 2020 Super Duty? Apparently, something has changes since 2017....guessing bc of transmission change....cannot find any info enen at Ford Fleet & dealer has no idea. THANKS.
I had my dealer do it before I even picked it up. I doubt there are any changes other than the wiring bundle going to the Upfitter switches...
Completed my install today. I finally found the pass through wires after pulling the fender liner.
The hardest part was probably getting a wire attached to the pass through in the passenger foot well. The wires are stupid short. I couldn’t get a crimped connector on there but found it easier to solder.
Pass through wires as found After I freed them from the harness
Finally got around to doing this mod today. Had to use every trick mentioned in this post. I removed the battery and tray 1st but couldn't find the pass thru wires. Found them after pulling the wheel liner but could only work with them from above. Easy to do with battery out of the way. The upfitter wires were actually long enough to connect directly, but added a length in case I needed extra movement at the fuse box later.
The pass thru wires in the cab were beyond asinine! Found the by removing the glove box, but could only access below. Once I removed the molded felt piece, I had a bit more room to get my crimper in there. Laying upside down on my head, of course.
Oh and what educated idiot (engineer) thought it would be cute to have 2 wires the same color (yellow/green)but have separate functions?
Took about 2 hours but most of that time hunting for the pass thru wires. Next time, I'll run my own thru the firewall.
On my 2019, the pass through wires on the engine compartment side. Wires exited the wiring loom up towards the big module. The harness builder back taped the cut ends to the main harness making it difficult for me to initial find. I think this is done to protect them from laying in the open air, unsupported. Just my thought.
Yep, I could see the loopback behind the fusebox on my 2019 F-450, so I just reached down behind it and felt around. Sure enough, they were taped - I twisted gently, back and forth a bit and they popped loose. I was able to bring all four up and up on top of the fuse box where I could pick one and make my connection. Even the inside kickpanel, from what I can see (I haven't finished that part yet - I just peeked) - the pass through wires in there seem to be longer on my 2019 than on some of the videos that I have seen, so I'm crossing my fingers!!!
O.K., so my SEIC High Idle Mod is DONE - very neatly laid out, cleanly dressed and routed, well planned and connected/checked multiple times! Flipped S1 Upfitter Switch with ALL conditions met (Parking brake on, nothing touching brake pedal, standard idle, oil and coolant temp normal) - N-O-T-H-I-N-G! Got my Multimeter out and started checking - with S1 on, 13.8V at Grn/Brn Upfitter wire, at my Yellow wire going across firewall to passenger side, at Wht/Orn pass through wire going back into truck, at green wire I attached to pass through to lengthen it to get to the Clip/Plug, at Yel/Grn wire (Pin 7) of that plug (PTO 1) (verified, that wire, not the other yellow/green, pin 18) - 20K Ohm resistor connected across Wht/Brn wire (Pin10) and Grn wire (Pin 9)! Plug returned to socket, nothing else out of sorts or disconnected, double checked resistance to make sure resistor did not break while heatshrinking, etc. - still 20K! WHAT AM I MISSING??? 2019 F-450 XLT 6.7l Powerstroke
O.K., so my SEIC High Idle Mod is DONE - very neatly laid out, cleanly dressed and routed, well planned and connected/checked multiple times! Flipped S1 Upfitter Switch with ALL conditions met (Parking brake on, nothing touching brake pedal, standard idle, oil and coolant temp normal) - N-O-T-H-I-N-G! Got my Multimeter out and started checking - with S1 on, 13.8V at Grn/Brn Upfitter wire, at my Yellow wire going across firewall to passenger side, at Wht/Orn pass through wire going back into truck, at green wire I attached to pass through to lengthen it to get to the Clip/Plug, at Yel/Grn wire (Pin 7) of that plug (PTO 1) (verified, that wire, not the other yellow/green, pin 18) - 20K Ohm resistor connected across Wht/Brn wire (Pin10) and Grn wire (Pin 9)! Plug returned to socket, nothing else out of sorts or disconnected, double checked resistance to make sure resistor did not break while heatshrinking, etc. - still 20K! WHAT AM I MISSING??? 2019 F-450 XLT 6.7l Powerstroke
Bro, got me stumped on this I have done it on my 15,17,19 and 20 and never an issue, worked first flip of the uplift switch.
Sure you have done this, but the 2 wires going into the Up Fit. Pull them and check for a connection which will prob tell you everything behind it works. Then check to see if you have a connection going forward into the UpFit. If that does not give an answer and it show good in both directions, it way beyond my pay grade.
O.K., so my SEIC High Idle Mod is DONE - very neatly laid out, cleanly dressed and routed, well planned and connected/checked multiple times! Flipped S1 Upfitter Switch with ALL conditions met (Parking brake on, nothing touching brake pedal, standard idle, oil and coolant temp normal) - N-O-T-H-I-N-G! Got my Multimeter out and started checking - with S1 on, 13.8V at Grn/Brn Upfitter wire, at my Yellow wire going across firewall to passenger side, at Wht/Orn pass through wire going back into truck, at green wire I attached to pass through to lengthen it to get to the Clip/Plug, at Yel/Grn wire (Pin 7) of that plug (PTO 1) (verified, that wire, not the other yellow/green, pin 18) - 20K Ohm resistor connected across Wht/Brn wire (Pin10) and Grn wire (Pin 9)! Plug returned to socket, nothing else out of sorts or disconnected, double checked resistance to make sure resistor did not break while heatshrinking, etc. - still 20K! WHAT AM I MISSING??? 2019 F-450 XLT 6.7l Powerstroke
So you have 13.8VDC at pin 7? Good.
And 13.8VDC at pin 10? Not good. Should have 5VDC at pin 10, and around 0.971v at pin 9 after the resistor.
So you have 13.8VDC at pin 7? Good.
And 13.8VDC at pin 10? Not good. Should have 5VDC at pin 10, and around 0.971v at pin 9 after the resistor.
No, haven't been able to take any voltage readings at the resistor yet, though that should be the next step. I just popped the plug out and measured resistance to make sure I hadn't broken a connection re-bundling the plug wires with my resistor. I'll check it tonight if I can!
Bro, got me stumped on this I have done it on my 15,17,19 and 20 and never an issue, worked first flip of the uplift switch.
Sure you have done this, but the 2 wires going into the Up Fit. Pull them and check for a connection which will prob tell you everything behind it works. Then check to see if you have a connection going forward into the UpFit. If that does not give an answer and it show good in both directions, it way beyond my pay grade.
Yeah, that's the point - if I disconnect the passthrough wire, from my green wire and read that 13.8 volts, when I shut off Upfitter S1, the 13.8 volts goes to 0 volts like it should! Everything down to the passenger side kick panel is good! Problem is down in that kick panel fuse box area... need more troubleshooting! 🤯
Well, in my original post I stated "13.8V at Yel/Grn wire (Pin 7) of that plug (PTO 1) (verified, that wire, not the other yellow/green, pin 18)" - guess what? I did a pretty, **** poor job of verification!!! I went out tonight to check a few more tips some folks had given me - I checked all the pins in the socket to make sure none were bent, I was getting ready to measure the voltage at the resistor that 'jollyrogr' gave me when I thought, let me look one more time here. I pulled back all the slack I could of the yel/grn (pin 7) towards the plug from the bundle. Then I grabbed my grn wire at the heat shrink and pulled the other way, the same amount. The loop I had created at the plug DID NOT MOVE!!! I flipped the plug over and sure enough, pin 18 was all shriveled up due to my pulling... dammit! (Obviously, I snipped, re-soldered and redressed everything)
Thanks for the help and sorry for the stupidity Guys!!! It's working like a champ now!!!
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