Duramax Tcm Fuse, We will start tracing wiring but was hoping for som
Duramax Tcm Fuse, We will start tracing wiring but was hoping for some help on the issue. The pink wire didn't have enough voltage. im installing my dsp5 and i think know where the tcm is. Went through all fuses and no change. No problems with mine yet but I would like to Keep it that way, thanks 2012 LML 143,000. In this video we show you how! Chevrolet Silverado 2500 fuse box diagrams change across years, pick the right year of your vehicle: Truck has no crank, no start, says check 4WD. 4x4. Got a car repair question? 2CarPros will answer your question for free by providing information that will help solve your problem quickly. I've checked/cleaned down to fresh metal all the engine grounds and chassis to body grounds. 2003 duramax keeps blowing PCM-B fuse, checked wiring and grounds then pulled TCM. They replaced the fuse and both of my problems are fixed. Is it labeled differently than TCM?:confused: Please help! the tcm is near the fan shround. I’m planning to pull a TCM from a 2003 Chevy Silverado Duramax at a junkyard, and I’m wondering if it will work in my truck if I have it programmed. Your ECM may not be dead -With the key in the run postion pop open the hood and open the fuse box -Locate the ECM fuse IIRC it is a 20amp fuse labeled PCM 1 -Remove the fuse and then reinsert it -You will hear the ECM switch on. stock… for now. I can across Diesel ECM Exchange out of NC. Crew Cab. Harness removed from 2005 Lly Duramax Plugs into ecm tcm engine trans fuse box and more. Visual inspection of wires OK between fuse box and TCM. Chevrolet Silverado 2500 fuse box diagrams change across years, pick the right year of your vehicle: I took the truck into the dealer. I have attached the listing for my 2008 model. Sent from my iPhone using Tapatalk Pro [/QUOTE Tried swapping tcm out, same thing. Even with a new TCM I’m still not getting communication to it. CHEVROLET SILVERADO TCU , TCM FUSE LOCATION REPLACEMENT 2014 2015 2016 2017 2018 2019If you have Chevrolet Silverado / Chevy Silverado and you want to see wh 07 lbz duramax no crank no start lost communication with tcm and abs control module no shift indicator light. 2004. Shift indicator bar under the letters still isn't showing and nor is my trans temp aint working either. TCM is definitely a good place to start. -The key must be in the run position for this to work Google "duramax How do you know that your Hey guys, workin on an 08 chevy topkick/c series ambulance with an lmm. I have searched the forums and haven't found a fix yet. Any family specific requirements are called out in the attached documentation. The Fuse will now hold. No just TCM’s internal memory stores all the information regarding the gear percentage operated by the vehicle’s engine, clutch button, and other significant codes. In this article, you will find fuse box diagrams of GMC Topkick 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay. Clipped on a new wire from the tcm to fuse box under hood and fixed it up. . When it first started a couple months ago i replaced the ignition switch and the truck was perfect for about 2 weeks then started to give intermittent u0101 again. 6 warning lights return after reprogramming Drew Ellingson Chevrolet Silverado 1500/2500 47w · Public 2024 Silverado Duramax 6. Feb 16, 2014 · A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Does your vehicle not run or stall? The first thing to check is the ECM Battery fuse located in the power distribution center. no power on pin 2 and 63 on the tcm connector. Eventually discovered that grounding the ECM to the chassis would allow it to start. Got communication again with TCM. Plus into ecm tcm transmission engine fuse box Since I know the starter or solenoid isn’t the problem, I’ve checked the fuses, groundings, NSBU, wires, and harnesses near the TCM connection to the transmission and the NSBU ports. what else can cause this issue im having?! I swapped a 2002 lb7 allison combo into my 2002 yukon denali, I have it running but have no PRNDL indicator, there is a connector C106 around the fuse box, that has no mate on the body side, inside that connector is serial data bus wire and a tcc brake signal wire that run into the cab. No returns Duramax 6. I have had a similar problem in the past, just my IGN 0 fuse was not blowing, IGN 0 fuse is TCM (IIRC)check DDM fuse or drivers master switch, mine was gummed up/dirty best I could tell. While I was at it, I put some dielectric grease on all the connections at the fuse panel as well as the TCM. Driving yesterday all the same messages and warning lights came on again. 6L Duramax For 2017-2019 Trucks Locate ECM fuse 57 and remove the factory 3 prong fuse. and under that should be the ecm right?? if i am on track how do i get the tcm out? thanks No crank, no start. Everything was still wrapped like it had left the Looking at my fuse panel map, I can't seem to locate the TCM fuse. Wiring diagram here : GM UPFITTER - Body Builder Manuals Click to expand I performed all the usual checks: fuses, voltage,resistance of the high speed bus wires, etc. I’ve pulled the fuse box out and inspected the wiring. Showed up customer said truck would not go over 45, speedometer doesn't work and check engine light. Expensive fuse, but it sure beats replacing the TCM and/or transmission components. Any other ideas besides checking the battery cable to the fuse box? I have spent over $3000 and still do not have it fixed. I am looking at rebuild options. The Electrical systems are common between the families. Started checking fuses and found the PCM B fuse was bad. Kind of at a loss with it. For now it's fixed so I'm just keeping my fingers crossed. GMC SIERRA TCM TRANSMISSION CONTROL MODULE FUSE RELAY LOCATION REPLACEMENT 2014 2015 2016 2017 2018If you have GMC Sierra and you want to see where the TCM t I am working on my 2011 Duramax 3500. Relaced and it immediately popped again. Inserting new fuse blows immediately. If there’s a blown fuse, then the TCM isn’t working at all. PCM-B 20A fuse was blown. I have the U0101 Loss of Communication with the TCM code. :rockin Cannot communicate via the OBD2 port on my Bosch unit, CTS, or my duramax tuner. 29,2008 Models affected: 2006-2007 Chevrolet Silverado Classic 2007-2008 Chevrolet Silverado 2006-2007 GMC Sierra Classic 2007-2008 GMC Sierra Equipped with Allison LCT-1000(RPO-MW7)Automatic Short story: it’s been a nightmare with problems. Since the ignition seemed to "work well enough" I didn't think it could be as simple as fuse. The TCM is not communicating. They found that IGN 0 fuse was blown. Is it tied into the ECM?:confused: Need to HP Tune the ECM only and want to remove the fuse for that purpose. EFI live doesn't even show the ECM is there. Connecting the “clear” C1 connector immediately Document ID: 2074199 #PIP3605A: CTC U0101 No engine crank and no communication with TCM Feb. Have 2 new batteries now. This is the TCM portion of the fuse and is not used for the unlock. Inspect the pins on both the harness plug as well as the TCM and make sure the pins are not pushed back on the harness plug. 1 was ECM lost communication to tcm, next was ECM The medium duty truck GMC Topkick was produced from 2003 to 2010. i'm going to guess the issue is the tcm is fried or theres a blown fuse somewhere or you let the magic smoke out of it,there is the possibility the ecm is kaput too. The communication wiring is spliced together, so check splice pack 207, which is shown in the picture below. Back probed C1-E11&F12 as well as back probed into the ECM #4 wire 1020, down to the TCM plug. Install your unlock cable jumper with the white wire closest to the firewall, this should leave an open fuse slot toward the front of the truck. 154k miles. GM recently stopped manufacturing my TCM as of March. you need to remove that to see the actual ecm The Electrical section of the 2003 & 2004 Medium Duty C Series Body Builder Manual is not split between Family 2 and Family 3 trucks. You will need to verify proper power and grounds to the TCM, check all fuses and communication wires. I’ve checked all grounds and it seems like my TCM is bad. Check the fuses. Jun 8, 2023 · I've tested the wires coming out of the dash fuse box, in to the under hood fuse box. checked the TCM for continuity between pin 9 and 69 like jc1843 says to do. 5 Silverado Duramax LLY. I’m replacing the TCM on my 2005 Chevy Duramax. May 4, 2023 · First, check that the vehicle's car battery is fully charged and getting a good connection. Unplugged both TCM connectors and fuse did not pop. Code is the U101 - tcm lost connection. It lists the connectors, pin positions and locations for the (1) power supply, ground, PNP switch and ECM circuit, (2) solenoid, stop lamp switch, oil temperature sensor and input shift speed sensor circuit, and (3) vehicle speed sensor (VSS) and hold switch circuit. Firstly, it enables the vehicle’s automatic transmissions to work consistently. To test continuity, trace this wire from pin #63 at the TCM to its fuse or relay source in the fuse box. can i 4LO input signal: C153 under hood fuse box 3 pin connector pin A grey and black, not sure how to use this yet as the schematics show it coming from the TCCM and going to the ECM and TCM. Any ideas? 0 reactions · 5 comments · 1 share Just installed a new trans in my duramax, ita not moving at all. Has anyone used them? Ok the diagram I was looking at shows that it gets powered up by the tcm do you have a diagram that will tell me wich connector on the ecm has this wire as I am also getting codes for no communication with tcm and fuel injection also shows fuel pressure regulator control circuit high when I put 12 volts to edu fuse all codes go away except loss Hi all, new member and first time poster. They said they reprogrammed something and fixed the issue. stand in front of you drivers side headlights and look down. One question on checking the wires I know a little about needed a load when checking for voltage. Get step-by-step guidance and expert insight from SOLO’s automotive tech team. Plugged “red” C2 connector back into TCM and still no fuse pop. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Dec 7, 2025 · Locate the essential TCM fuse protecting your transmission. Was a no crank condition. Some damaged clips. I pull it in, hook up my Mac scanner and find a u1000, u0101 and u0106. it is a silver thing that says DELPHI on it. No power on the crank fuse in the under could it be the ignition swith? how does the TCM recieve voltage (through the ecm or direct)?? should i recheck a cretian fuse? why is the TCM voltage dropping when the truck starts? Ron Nielson said: check your TCM BATT fuse, 15 amp #9 in my box, TRANS IGN fuse, 15 amp, #15 in my box. LBZ Duramax. You want to rule out the fuse first before replacing your TCM. can we get those posted? and other major systems? seam a coupel of us have ran into some electrical wireing problems :mad: CHEVROLET SILVERADO TCM MODULE FUSE LOCATION 2006 2007 2008 2009 2010 2011 2012 2013If you have Chevrolet Silverado / Chevy Silverado and you want to see whe Got it fixed! Ended up the same problem as myduramax. I have checked all of the looms, and wires, there are no visible breaks. During the past month and a half i ATS Diesel Performance now has the relocation kit available that moves the TCM behind the fuse panel in the back corner on the drivers side using a extension wiring harness and a bracket. But it's all good now. Pulled the fuel pump relay and starter relay, no change. My issue is I have no start, no crank, no PRNDM1, no IGN 0, no power to starter relay, no power to blower motor, no power to pin 63 on TCM but 10 is good. Jul 10, 2020 · On the underneath side of your fusebox there should be a diagram of the fuses and a number to name listing. All have the same 1. I have a 2008 Duramax which is doing a similar thing. I’ve also checked the ECU and TCM wires. I checked from under the fuse box to the TCM, and the loom that runs in the wheel well. Ok so new update found a blown fuse ignition 0 in cab replaced fuse. Duramax Fuse Removal **Remove the fuses that correspond with your vehicle year before connecting the Autocal. If your vehicle is attached to a trailer, make sure the brake light receptacle outlet and plug are disconnected. ATS A40 / A50 TCM Relocation Kit Fitment: 2006- 2015 GM 6. Can’t find an issue with the wiring or Allison TCM for Duramax Allison Transmission available from the performance diesel experts at Ryan's Diesel Service. the ecm is covered by a black cover. open you hood. This document is organized as follows: Installed it and can't flash a tune. Pulled half the tape and plastic from wires haven’t found anything yet. Learn how to fix lost communication with TCM without replacing it. Good luck How to fix a U0101 engine code: Lost Communication with TCM (Transmission Control Module) Diagnosing a U0101 can be difficult and time-consuming. Expert guidance on common locations, diagnosis, and safe replacement. Hope this helps, and I hope you find something less expensive to be the problem because the TCM sure hurts the wallet a bit. itll be between the head lights and the fuse box and its under the radiator hose IIRC. Hello I’m trying to decide if it would make a difference to relocate my TCM to my ecm bracket or fuse box to keep it a little cooler, if anyone has or knows if it’s a wise decision please let me know. the ECM is near the fuse box. I have a pin out diagram of the main harness Is there a fuse for the transmission control module? Check The TCM Fuse The first thing you should do is check the fuse associated with the TCM. LLY People do this. Is it possible to TCM took a dump and is making the ECM not connect even though I can still communicate with the TCM. I'll go throughout fuses now Click to expand Finally gave in and got a TCM from Ryan's Diesel Service, installed that, everything works perfect now. Start by inspecting the wiring harness and connectors for damage or corrosion. I redid the wiring on the TCM plug that was replaced but noticed there’s was three yellow wires, I reattached them to the same spots Wiring harness removed from 2006 LBZ Duramax. 3V. But if I remember correctly you should be able to communicate with the ECM even with a bad TCM. Had to stop due to rain, can't get the truck in my shop. and it came out positive. the crank signal is sent from the 10a fuse to the tcm and ecm, the ecm is where the relay coil is powered from. Why is it essential to learn how to test TCM Duramax? Well, there are a few reasons behind this. Any ideas or advice would be appreciated. I did check the resistance on TCM and Loose connection at the fuse box under the dash (pink wire). Thanks for any Hey guys, so i have been having a intermittent tcm problem, getting u0101 (lost comm with tcm). So it’s also likely you have an ignition switch issue or just a blown fuse. Shop Allison TCM's now. Still have P0880 loss of power. A lost communication with the Transmission Control Module (TCM) in a 2002 Duramax usually stems from faulty wiring, corroded connectors, or a failing TCM. Any changes in voltage during the flash procedure can result in damage to your ECM, laptop, and/or AutoCal/V2 device. However the TCM still shows up. so i guess the TCM is not blown. Verify ignition-on voltage presence and check for any breaks or corrosion along the harness. Ground is passenger side of engine, side of block near exhaust manifold. 6 Took the truck in 1 week ago with these same messages and warning lights. x1oikg, irswm, nz7tt, emglw, mtrm, 83imf, wqfcb, cvi3dv, vq6e, dgjk4r,