ECM/TCM fuse
#1
Launching!
Thread Starter
Join Date: Dec 2011
Location: Jim thorpe, PA
Posts: 287
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Ok went to the drag track last night, problem is when I shift from 1st to 2nd at higher RMP range the ECM/TCM fuse blows. No codes the car just shuts down. I can run 1st gear almost to redline no issue, same with every other gear and shift. Blowing the fuse only occurs on the 1st to 2nd shift. I tried going up in fuse size from a 10 to 15 with the same issue. Just started doing this so not sure whats going on. Any Idea's? On side note there was a V2 wagon running mid 11's and when we were leaving a V1 was being trailered in. Thanks in advance.
#2
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Usually we're being trailered/towed OUT ![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Take a look at all the wiring looms to your wheel sensor modules, see if any have exposed wires, or might be grounding out someplace.
I had a problem where my car would intermittently not start, and it turned out that one of the wiring harnesses was rubbing on a braided line under the hood.
Check all your leads and wires to make sure nothings shorting out and rubbed raw. That's where I'd start.
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Take a look at all the wiring looms to your wheel sensor modules, see if any have exposed wires, or might be grounding out someplace.
I had a problem where my car would intermittently not start, and it turned out that one of the wiring harnesses was rubbing on a braided line under the hood.
Check all your leads and wires to make sure nothings shorting out and rubbed raw. That's where I'd start.
#4
TECH Fanatic
iTrader: (6)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
sounds like a short somewhere to me.. if its only doing it in the 1-2 shift (which is the most brutal) id look at the MM first then start looking around the TC module harness and work my way out from there.
are you getting any clunk or thuds from the drivetrain when this happens.?
are you getting any clunk or thuds from the drivetrain when this happens.?
#5
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Not the first, but it's the best thing to do.
You say you've upgraded your headers, check along the pipes and see if something isn't melted to them, or that a wire loom doesn't come swinging back and make contact with them.
I didn't find my fuse problem, until one time at night I had my girlfriend just sit there with the key to the crank position, and I could finally find where it was shorting out from the smoke coming from the short.... seriously...
Not the best idea, but I was really f'ing pissed that night, and was to the point of not giving a **** anymore lol
You say you've upgraded your headers, check along the pipes and see if something isn't melted to them, or that a wire loom doesn't come swinging back and make contact with them.
I didn't find my fuse problem, until one time at night I had my girlfriend just sit there with the key to the crank position, and I could finally find where it was shorting out from the smoke coming from the short.... seriously...
Not the best idea, but I was really f'ing pissed that night, and was to the point of not giving a **** anymore lol