4L60E Trans only shifts 2 and 3

[ewoody625]

Originally Posted by ls1nova71

OK, so now we're getting somewhere. Do you have 12v on both sides of that fuse? I would think you wouldn't since you did a continuity test on the wire. If you do have power there, then you almost have to have a break in that wire somewhere between the fuse and the trans plug. It's possible that by moving the wires around to test them, it's making contact again however. Have you tried to drive it again? If the short is intermittent, then your best bet is going to be to replace the wire from the fuse to the trans plug since finding the short in the harness with it in the truck will be pretty difficult.

I have half of the wiring out/disconnected. I'll continue to trace the wire back and see which one it is. There are 4 pink wires going to that 10a fuse. I will also check to see how many volts I have there at the fuse.

[ewoody625]

I have 12.6 volts on the left side of the fuse and 0 on the right.

[ewoody625]

I'm still tracing this pink pin E wire but I've gone past where they split off to go to the fuse block. So this wire has to go to the ecm. It goes to pin 63 on the green ecm plug.

[ls1nova71]

Originally Posted by ewoody625

I have 12.6 volts on the left side of the fuse and 0 on the right.

You've found your problem right there. If you have power on one side of the fuse but not the other, then either the fuse is blown or its not making a good contact in the fusebox. Fix that and you should be good to go.

[ewoody625]

Originally Posted by ls1nova71

You've found your problem right there. If you have power on one side of the fuse but not the other, then either the fuse is blown or its not making a good contact in the fusebox. Fix that and you should be good to go.

Wow.... I feel like an idiot lol. It looked good when I checked it before. I just looked at it again and it's blown. Well now I need to replace that fuse and get everything hooked back up and see if I'm back in business. Thanks for guiding me along.

[ls1nova71]

Originally Posted by ewoody625

Wow.... I feel like an idiot lol. It looked good when I checked it before. I just looked at it again and it's blown. Well now I need to replace that fuse and get everything hooked back up and see if I'm back in business. Thanks for guiding me along.

If you have the harness out, Double check it for any bare wires. You need to find the cause of the blown fuse.

[ewoody625]

It's shifting now. I still have a flashing check engine light but no codes. I'll have to keep an eye on that. Thanks for the help!

[Duck1]

Originally Posted by ewoody625

I have 10.6v at the pink wire on the big round trans plug. That is what I am currently tracing back to see where my voltage drop is coming from. I do not have the tcc wire hooked up, I was told that is optional. To clarify, the tcc gets power from the brake switch? Or it goes to the brake switch and to a power source? I'm at the end of my rope on this. Ready to pull it all out and put my 350 back in. I appreciate the information.

And spend money on a drive shaft. Worst gas mileage. Instead of fixing the problems

[ls1nova71]

Originally Posted by Duck1

And spend money on a drive shaft. Worst gas mileage. Instead of fixing the problems

????