Hi there uh this morning we're going to talk to you a little bit about active exhaust on the uh
the newer Mustang. So I've got a 2021 Mach 1. I know active exhaust is on several of the Mustangs and
a lot of folks are having issues with blown fuses and and errors it's caused by one problem. It's
caused by uh a wire harness and I'm gonna show you that harness. It rubs up against the frame
it's only the passenger side so don't even look at the at the driver's side no sense in that. I put uh
res delete on here and that was part of the issue. So when I put the res delete on
cut it just a little bit too long and that caused the the muffler to be back about maybe a half
inch and that half inch is enough to to get that harness to to rub against the frame and then rub
against the frame will cause the wires to strip the coating and once you strip the coating it's
it's going to short and once it shorts it blows the fuse. So uh without further ado I'm going to show
you this harness and how to correct it. Here that's the harness and that's what's giving you issues.
So if you see back there's the frame and the harness is on top and it's just got a wire clip on it
and that clip's got to be popped out and that's where you're going to find it your wires are
frayed and you're having issues. So you can see I'm reaching up right here where my hand is
and this is where you can access that clip. So if you put your hand right here by the exhaust tip
you just kind of reach up snake up in there you'll feel that
uh that clip on there and it's just a white retention clip. It just needs to be popped out
so I'm gonna grab a little screwdriver and just push on it release the clip and then I'll be
able to pull the harness down and show you what's going on with the harness. So I use one of these
it's just a little stubby flathead screwdriver all I'm going to do is just push that clip back .
Once the clips push back you just pull the harness out and then you'll have access to it.
so there's nothing and this will probably take uh two or three tries to get on this thing but
if you've got great big arms find a friend that's got a little bit smaller arms
it does make it easier. There she is. Okay so the clips out now or almost out...
okay the clip's out now and I get the harness down I'm gonna move the camera
to show you where that harness is. Okay so here's my harness this is the issue right and I took
this off before and threw some gorilla tape on it but today I am going to silicone the short.
I love Gorilla tape but silicone is a better probably a better permanent fix. You can buy
this harness that does just loop around uh behind the car the harness is like 90 bucks and I don't
really see a reason to buy a harness for 90 bucks but it's just a couple of frayed wires. So I'm just
going to throw some silicone on here, put the Gorilla tape back on it, plug the thing back in.
At some point you have it rubbing so this muffler needs to go that way. Maybe by a half inch just to
give you the clearance. I think they use the same valve and it's just on the the inner uh tip but I
think they use the same valve on both sides. So on the driver's side the valve the harness is facing
the other direction so it's not the problem it's only on the passenger side. Okay so I'm going to uh
pull this old Gorilla tape off, throw some silicone on there, let the silicone set, reapply the Gorilla
tape and uh I'll be back to you. Okay so here's the issue if you could see these wires up here are frayed
and they're frayed right there, and that was rubbing up against the frame,
and when you have live wires rub up against metal, it's going to short, the shorts going
to blow a fuse, that's why you have a fuse, but that also disables your active exhaust.
So I'm just going to run a bead of silicone across here and then reapply my Gorilla tape. This heat
tape up here is really nice but for some reason it just stops short and actually stops short
right where the harness hits the frame. So get my silicone out do that up and uh let it set
and then reapply the Gorilla tape uh snap the harness back into place and we're good to go.
okay so you can see my silicone is pretty much set up here I am uh gonna grab a piece of
what I like to use is gorilla tape but I guess you can use whatever you want, but, just gonna
wrap this around here you got to watch when do this because the clip still got to go back in right? So
wrap this around here to kind of give that silicone a
place to live. That looks pretty good there now all you got to do is get your arm back up in here,
and it's way up in here, and reinsert this harness.
This is actually the easy part once you get it lined up.
So the harness is back in push the clip back in
job done. Okay so that's it so that's your problem it's the harness on the passenger side. Here's the
tools I used. I think this was five bucks it's silicone get that any hardware store anywhere.
Stubby screwdriver that works best to pop that retaining clip out of the harness and pull it down,
and then my favorite Gorilla tape and obviously by the 40 subscribers I have I'm not paid for any of this so
uh but that's what worked well for me and that solved the problem. I just took the car on a
3,000 mile trip with just the Gorilla tape on it no issues no problems active exhaust worked
the whole time. No sense taking this thing to the Ford dealership they're going to blame you anyway
and it's you know it's a 10 minute thing so good luck out there hope this helped see you next time.