If you have a 4L60E with a blown fuse, we’ll help you find it’s location. It’s not that hard to get to. This can be the problem that is causing your truck to go into limp mode, since the 4L60E will default to limp mode whenever it’s not getting a signal from the TCM. Below is the under hood fuse panel for a 2006 Chevrolet Silverado. It’s the same for the entire GMT800 Platform, which includes:
- Chevy Silverado
- GMC Sierra
- Chevrolet Tahoe
- Chevrolet Suburban
- Chevrolet Express
- GMC Yukon
Where is the 4L60E fuse?
You’ll find the fuse to the 4L60E located under the hood of the car or truck. It won’t be in the fuse panel that you’d think of when looking under the dash. It’s under the hood, usually on the driver’s side. It’ll be pretty easy to find and doesn’t require a lot of effort to open.
Most of the vehicles that the 4L60E came in were trucks like the Silverado, Sierra, etc… There’ll be plenty of room to get in and take a look at the fuse box. If it’s a Camaro, it might be a bit tighter of a fit.
The fuse box has a plastic cover on top of it to keep out the elements. Pop it off and you’re going to look on the schematic for the fuse labeled TCMB. That stands for Transmission Control Module. That’s the 4L60E fuse.
You can either pop it out and inspect it, or you can use a test light to verify that it’s getting current. I prefer the test light method since it tells you more about what’s going on. You can confirm that it’s hot on one side, both sides, or no sides of the fuse. Never trust that a fuse isn’t bad from a visual inspection. A test light is a few bucks.
If you don’t have access to a test light, just replace the fuse with a new one anyway. It can’t hurt if you are strongly suspecting that the 4L60E’s fuse has blown anyway.
Symptoms Your 4L60E Blew a Fuse
The number one symptom that your 4L60E blew a fuse is that it went into limp mode. Limp mode for this particular transmission means that it only has access to second, third, and reverse. When in limo mode you have to manually put it into second gear. It’ll go into second if you put it into 1 or 2 and stay in third if you put it into 3 or 4.
Checking to see if your 4L60E blew a fuse is the number one thing you want to do before taking it apart or crawling under and looking at the wiring. That’s because it’s the cheapest and easiest thing it can be, and there’s a good chance that the fuse is actually blown if the transmission is in limp mode.
Blown 4L60E Fuse
When encountering a blown 4L60E fuse, it’s important to track down what caused it so blow. These trucks are getting older and there are often problems with wiring as it gets older and more brittle.
You can replace the fuse and see if that solves your problem. But, keep in mind that usually once a vehicle blows a fuse, it’ll keep blowing fuses until the underlying problem is solved. I always go by the I’ll change it once and see what happens approach. When it happens the second time is when I begin to troubleshoot.
If the fuse to your 4L60E has been blown, I’d check the wiring to closest to the transmission first. It’s exposed more to the heat and elements than most other wiring on your vehicle. After that, check to see if any of the wiring in the harness at the transmission itself looks damaged or frayed. You may need to splice in some new wiring.
Conclusion: 4L60E Fuse Location
Finding your 4L60E’s fuse is really not that difficult. It takes almost no mechanical skill and can have your car or truck back on the road in only a few minutes. Good Luck with your transmission. If it wasn’t blown, try checking out: