Not a Blazer but a 4l60 problem just the same

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May 6, 2022 | 06:52 PM

#11

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Joined: Oct 2019

Posts: 699

From: West-Central Florida

Quote:

Originally Posted by bigblock540

Ok well I have issue still. Ran new circuit and it shifts 1 time then blows 10 am fuse.I moved my circuit to a different spot,same thing.I have these codes po758,po740,po753,po785. I replaced both a nd b solenoids with new GM before I did the new circuit.
Do I have a shorted internal harness ?

get a picture with flash of the inside of the connector on the transmission harness, if you see anything in there, moisture, corrosion, and ESPECIALLY red 'something' of any sort, clean it and or replace the harness, if you have ATF in the connector the seals are blown and the harness needs to be replaced on the transmission, its relatively easy, since you've changed the solenoids before you already are capable of doing so. 4L60E's leak fluid bigtime out of the connector as they age and heatcycle.

May 7, 2022 | 09:52 AM

#12

bigblock540

Thread Starter

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Joined: Apr 2022

Posts: 10

Connector is dry,I'm going to ohm out all the solenoids and the harness. Does anyone know ohm readings on all the solenoids? I know a and b should be around 20ohms but not sure bout others,maybe like 10 or so on the pressure solenoid lol idk. Tks for reply though preciatit!