Today I had a 1998 chevy 2500 pickup truck 5.7 vortech No Start with a blown ecm 1 fuse. I found a short in the wiring harness near the passenger side exhaust manifold. i hope you find this video useful. thank you
You said you hope it helps somebody. It did. This morning I decided to finally do something nice for the kids and take them out for good donuts. We were pulling out of the parking lot and the 96 Tahoe died. It made a noise I never heard before. I got on the side of the road and told myself to think it through. I could crank the engine but no fire at all. I looked at the tach. I dont know if this is true but my quick check for spark is to look at the tach needle. If it doesn't "Wiggle" when cranking then no spark. So I got out and looked under the hood. No oil. No smoke. Im not sure where the coil is on this. So I stumbled upon the fuse box. I opened it and looked at the relays. Cant tell anything. The first fuse I looked at was blown. I looked under the cap. It was the ECM. Great. I replaced the fuse with a spare and cranked it. Nothing. I looked at the fuse again. Blown. I had visions of leaving the car and going to the junk yard and taking off work. My wife would have to come get me. She is afraid to drive more than 3 miles from the house. I'm seeing dollar signs leaving my pocket. I dont have many of those but the Lord provides. I was hoping for a short circuit but where on earth to start looking. I dont have a volt meter with me. I grabbed my phone and went to youtube and looked up Silverado ECM fuse. Yours was the first video I saw. I looked at the harness. Oh yeah. That was it. I duct taped the harness to the side. Replaced the fuse and away me and my 3 young boys went. In only about 20 minutes. God helps me out of problems. I know this. My wife says he hears me. And this time he used you to help me. I cant thank you enough for posting your video. You really helped my family out of a mess. I will pray for you and your family. May the Father bring you health and prosperity. Please watch on youtube the Kent Hovind Creation Seminars and the discoveries of Ron Wyatt. They will change your life. I hope to someday repay you. Thank you, Tom
Thank you so much for the comment! I had lost motivation to continue with RU-vid, but your comment has given me the motivation I needed to get back to helping people with their vehicles. I am truly grateful for your support. Thank you!
- I have experienced a shorted ABS module on Astro Vans that I know is the cause of many fires and Injury to people and property. The van can be off without the key in the ignition , and when that little module underneath by the prop valve shorts it has the ability to carry enough amps to cause the 1/4" brake line going to the rear brakes to glow red hot, and it runs along the fuel lines and the Plastic Fuel Tank which I have seen melted clean through. The tell tale sign of this is upon inpecting the brake lines the 1/4" line to the rear is noticeably blued from the heat. Its fucked up , man. No recall or nothing.
Thank you for the video I think I just found my problem it's cost me a lot of money to get here but I appreciate you putting that up because I think I got it that wire it was melted to my f****** exhaust manifold
Man, this video literally just saved me from being towed off the interstate and paying for a tow . Was able to fix it right there in the side of the interstate! THANK YOU
Wasn’t even having the issue. Just checked on the 2000 k2500 ccsb I have. It was resting against the manifold. Good call! Caught it before it became a problem. Thanks for the heads up!!!
Wow! You should probably never take this video down, ever. I thought for sure it was the pump this time. I've had to replace relays more times than i can count, but this time it wasn't the relay. I had to have it towed home, and i was about to order a pump online when a ran across another video that was talking about another fuse for the fuel pump. When I went looking for that fuse I found out the ECM fuse was blown and then I came back in to do more research at RU-vid University. That is when I ran across your video and yes my wiring loom had come loose from the clip and melted itself to the manifold. Thank you for your insight, it seems you have helped a lot of people with this one video.
My 1998 K3500 started randomly blowing this fuse but every time it did, it took out my Ign. coil at the same time. I replaced the coil about 8 or nine times until I finally discovered the instrument panel connections were loose/dirty. I pulled the gage cluster out and re-set it back into place and it has never happened again! I found this by tracing the coil signal wire from the coil all the way to the back of the cluster. Tere are about 30 tiny little pin connectors that make contact when the cluster is "pushed" into place. I think years of off roading and bumps shifted things? As a measure of safety, I installed a 5 amp inline fuse to protect the coil. So if it happened again, the tach would lose signal, but the coil would be safe. It took me a very long time to figure this out. Hope it helps someone.
I have a 95 Chevy 1500 5.7L The ignition coil is not receiving power. I tested the power that comes from the ignition to the coil with a light test, it lid up. When i looked at my gauges i realized they were no longer working and now there was no more power going from the ignition to the coil (light no longer turned on). Thats where i ended up today. Any advise? Thanks in advance, good video.
I had the same problem, I was about change the fuel pump, but I saw your video, and checked my truck and sure enough that wire was rubbing on the exhaust. I fixed the wires, and no more burned fuse. Thanks, saved me a lot of money.
Mine doesn’t do that mines got constant power I’m not sure if it’s supposed to but I’ve gone through the wires and it’s still doing it I’ve looked and looked and looked and can’t find the issue still.
same problem with my s10, everytime I hit a pothole the fuse blows up. I used to change the fuse and it would fired back up but last week it didn't. now its in the shop and apparently everytime the key is on, the fuse blows up. stupid chevys! last year I bought a blazer, the engine blew up at christmas. I bought that pos s10 afterward it left me stranded for the 4th time this year. I swear this is my last GM. I never been stranded in 6 years since I first driving. going back to ford lol.
I hate when people bypass fuses.. like... do they think that they are there just for shits and giggles? Have fun burning your truck to the ground because you "fixed it."
I had a different failure mode. Had just upgraded to MPFI spider. The clip that holds the MPFI control unit has sharp edges and cut through one of the injector wires. I filed the edges of the clip to remove edges, and re routed wiring so it would not chafe. Same symptoms, ECM1 fuse kept blowing. There are insulator tubes on the injector hoses/wires. Slide these up toward the clip to prevent chafing.
Before replacing your wire harness. Check for continuity with a cheap volt meter. Electrical flow from one end to the other. The wire loons don't have to look burnt to have a broken connection. Heat and age will brittle the wires. One good sign is your volt gauge will jump from .5- 1 full volt from a mere electrical operation like the turn signal.
Having the same problem but no issues with the wire being close to the exhaust manifold, when I disconnect the wiring harness from the fuel injection the fuse won't blow. So what do you suggest I do.
Just wanted to say this info needs to get out there, there is all kinds of posts online with this problem and your the only one that I've seen to diagnose it. Mine wasn't on the exhaust but instead rubbed raw on the motor it self, just hit 100k on my 99 k2500. Thank you.
I have a question, besides what happened to Thomas W. Does this truck you fixed was just doing the same? What happened with the truck when they bypassed the fuse ? It was just shaking o much or what? Thanks
had problem with ecm fuses blowing check out internet for some of the same problems on1997 s10 4.3 found the wires that plugged into crank sensor had rubbed raw and shorted out on transmission lines coming from radiator hope this will help someone else find there problem . so check on passenger side around exhaust first.
That is exactly my problem I’ve been spending months spark plugs spark plug wires distributor cap ignition timing just to figure out it’s the Crank sensor wires that are shorting out together
My 2000 s10 ecm fuse keeps popping you think it’s a similar problem imma try track down this wire tomorrow hopefully it’s something this simple really good video
How many wraps of copper wire and what guage should we use for the proper meltdown. Thanks so much for the video. I have not even gone back to the garage and looked but I’m almost ooostive without a doubt this is the exact situation I’m dealing with. Very cool to find a video first time out that actually has exactly the issue I’m having. If I don’t edit than this was my problem. Thanks.
Exact same problem with my 98 Tahoe. But I can't find the short. I did tape up them exact wires about a year ago, but it didn't short out. I'm gonna double check them Tomorrow
I found the same problem for my 2000 Cadillac Escalade. It has the same motor setup as previous years. I dropped the tank replaced the fuel pump in -7° and it was just that cable out of place. Man... But thank you for the video. I would of kept taking my truck apart if i hadn't watched this. Lol
Would anyone here happen to know what the name of the harness replacement would be for these trucks? Or what is the best way to go about replacing that wire?
All i did was cut the 12 volt an a wire that was touching behind my dash bezel, seems okay, just changed to 10w-40, really only drive to work, pretty short distances, short freeway trips, also took my dome light out, radio fuse cause i have no radio, idk, she does what she wants
The short can happen from the insulation on the wire melting off and the bare wire touching the manifold. Or it can happen if the wires melt together and one shorts to the other.
Generally speaking, a bad ground on a circuit will not cause the fuse to blow. Usually a short to ground on the power side of the circuit is what causes a repeatedly blown fuse. Thank you for watching!
dude i found a hotwired fuse in my truck EXACTLY like you found, after it randomly wouldnt start one day. had the same copper wire technique. i saw that and thought "jesus christ ive been driving like this for over a year". mine was the 50amp Ignition B fuse and it was already blown aswell.