New Sunroof Motor Crazy Issue

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Mar 22, 2024 | 04:41 PM

#11

hummerz

Senior Member

Joined: Jul 2012

Posts: 8,999

From: C-Town

Mar 27, 2024 | 12:45 AM

#12

finall

Senior Member

Joined: Jul 2007

Posts: 831

From: Pacific NW

Go direct and contact motor manufacturer. There should be a stamping on it maybe? New one may be the wrong motor. Worst case, get the old motor rewound at an electric motor shop. You are talking to the wrong people. The sunroof installers with a jigsaw in one hand wont help you.

either
1. wrong motor, ie wrong part number, or motor superseeded with different unit by GM that was not tested in H2
2. wrong pinout for your year - can be tested or looked up. Your hint is the extra pin in the harness.
3. bad new motor - can be bench tested once pinout is known
4. is there a logic onboard the motor? If it is just dumb, then you can easily bench test. If logic controlled, you cant.

the solution is not that hard…..

Last edited by finall; Mar 27, 2024 at 12:51 AM.

May 28, 2024 | 09:20 AM

#13

8_ball

Junior Member

Joined: Sep 2023

Posts: 8

New Sunroof Motor Woes

Quote:

Originally Posted by HBrod2005

Thanks for the info. I got the sunroof looked at. The shop said the sunroof motor will not power on and move anything since it may not be for my specific year. There are 4 wires coming out of the connector for my 2005 Hummer and the motor is setup for needing 5 wires? He said the motor must be correct for my specific VIN. When i searched for the correct part number for my VIN, it came up my GM part number 15781626. It does not appear there are any other part numbers for sunroof motors for H2's? I have had 3 shops look at this with no concrete answers. All electronics have been tested on the Hummer and they all work. They just won't power a new motor but will power my old one in one direction. All of these shops said they have never seen anything like it. I am going to have to live without a sunroof I guess.

I had this exact problem, solved it by taking the logic board out of the old motor and installing it into the new unit and BOOM! it works....

May 28, 2024 | 09:21 AM

#14

8_ball

Junior Member

Joined: Sep 2023

Posts: 8

I had this exact problem, solved it by taking the logic board out of the old motor and installing it into the new unit and BOOM! it works....

May 28, 2024 | 01:03 PM

#15

HBrod2005

Thread Starter

Junior Member

Joined: Mar 2024

Posts: 8

Thanks for the info, how did you get the logic board out? From what I saw, that was not removable. It was a rectangular box. Maybe you can send a picture of what you replaced, thanks!

Jun 17, 2024 | 08:28 PM

#16

8_ball

Junior Member

Joined: Sep 2023

Posts: 8

Replace the circuit board on the new motor with the old one. It will work.

Sep 26, 2024 | 09:33 PM

#17

8_ball

Junior Member

Joined: Sep 2023

Posts: 8

Quote:

Originally Posted by HBrod2005

Thanks for the info, how did you get the logic board out? From what I saw, that was not removable. It was a rectangular box. Maybe you can send a picture of what you replaced, thanks!

As I remember, there are 4 screws... it separates... no pic, sorry! Take care with the two wires, they crimp and break easily... out of 3 motors , 2 were damaged that way....

Last edited by 8_ball; Sep 27, 2024 at 06:57 AM.