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Old 09-25-2020, 11:33 PM   #15
dayj1
Senior Member
 
Join Date: Jul 2009
Location: Athens, AL
Posts: 499
Re: 4L60E Trans only shifts 2 and 3

Quote:
Originally Posted by ewoody625 View Post
This maybe a stupid question but how do I do that?
Your harness should have a fuse just for the transmission (it would have originally went to the fuse block in the truck that the harness came in). But, if you don't, then you'll have to trace the wire from pin E to determine where it's going now.


Quote:
Originally Posted by ewoody625 View Post
And is the 10.6v on pin N ok?
Pin N is an output from the transmission fluid pressure switch and would just be grounded when active. 10.6 V sounds reasonable to see since the PCM most likely has a pull up resistor to force the signal high when the switch inside the trans isn't closed. While I can't 100% confirm it's OK, I wouldn't worry about it at this point. The missing power on pin E would cause all the trans codes that you're getting.
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