Window Goes Up, Then Down!
Tech Contributor
Joined: Oct 1999
Posts: 41,066
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From: Charlotte, NC (formerly Endicott, NY)
Bill
Drifting
Joined: Dec 2019
Posts: 1,817
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From: Blacksburg Va
These are a tough ones to solve some times. Most of the japanese systems I am familiar with use a sensor to monitor how much amperage the window motor is drawing. Too high amperage = something causing the motor to 'strain' more. If you push the button to close it and then stick your fingers where the top of the glass will contact the seal you can get an idea of how hard it will squeeze. The engineers try to select an amp level that won't be too painful but will also reliably raise the window. That can be a pretty narrow window to hit. Usually, some spray silicone on the seals will help. I have no idea what Chevy uses for the mechanism to translate a rotating motor shaft to move the glass, but I have a couple times on older cars found a little oil on pivot points helps. I like daffydrunk's idea of disconnecting the battery and THEN doing the indexing. Most of us know that the first thing to do when a PC acts up is do a shut down, wait 30 seconds, restart and since these are actually ECUs running our cars.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,106
Likes: 12,446
From: NE South Carolina
^^^
I mentioned in post #2 what I would try assuming it is an excess current draw but won't hurt whatever it is. Apply some silicone weather stripping treatment. Remines me I am due to put weather stripping conditioner on my 14 month old C8! I'll apply at half time!
I mentioned in post #2 what I would try assuming it is an excess current draw but won't hurt whatever it is. Apply some silicone weather stripping treatment. Remines me I am due to put weather stripping conditioner on my 14 month old C8! I'll apply at half time!
Last edited by JerryU; Nov 27, 2021 at 02:21 PM.
Tech Contributor
Joined: Oct 1999
Posts: 41,066
Likes: 9,835
From: Charlotte, NC (formerly Endicott, NY)
Like I said in my post the codes have to be checked. Until they are checked we can only guess. After they are checked we may still be guessing but certain items may have been eliminated as causes so the range of guesses is reduced.
Bill
Bill
