My trans is stuck in failsafe mode, I have already replaced all the solenoid's. After doing some research and working with my buddy at his shop we figured it's an electrical problem. I need to schematics that show where the transmission gets power from,what fuses it uses, and ignition switch wiring.That way I can try to trace back where I'm losing power and I can try to bypass it so that I can verify the problem. Any help would be greatly appreciated as I'm pulling my hair out and been dealing with this for a few weeks

 

Here is an entire 4L60E PDF.

http://www.grail-ss.com/GRAIL%20Webs...ETechGuide.pdf

 

Thank you!

 

Ignition zero fuse good. Also have ignition power at the trans. What should I check next?i am struggling. Codes currently p0785 3/2 shift timing solenoid problem
P0713 trans temp sensor circuit signal high

 

Replaced temp sensor unit. Still in limp mode

 

See attached diagnostic and schematic.....assuming we are talking about a 4L60E in a 99 truck????

 

2004 truck, 4l60e

 

2004 schematic and diagnostic

 

Have power where I'm supposed to. Still in limp mode.im swapping in a different trans in the morning. Hopefully it works

 

Trans I was going to barrow is set up for a car and not going to work without swapping parts by removing valve body. Since its new I don't want to take it apart.So not going to get to use it. I am at my wits end with this truck and ready to drive it into a wall.