Fix for cold solders in the Wiper Motor

	Blazer Forum Classifieds Photo Gallery Search Contact BF Sponsors
Blazer News Member List Forum FAQ Timeslips Recalls TSBs Calendars Register Login

Fix for cold solders in the Wiper Motor

Printable Version

Blazer >> Mechanical & Maintenance >> Do-It-Yourself >> Fix for cold solders in the Wiper Motor

Page: [1]

Message

<< Older Topic Newer Topic >>

Fix for cold solders in the Wiper Motor - 1/4/2007 8:19:22 AM

swartlkk

Posts: 14499
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

Since this has been a hot topic and is a wide spread issue across all GM vehicles that use this type of wiper motor, I thought I''d move a post I made earlier out to the DIY section for everyone to read through.

The most common problem with GM wiper motors found in their truck/suv is the solders on the circuit board. You should be able to pull the front plastic cover off of the wiper motor and then unscrew the circuit board. Once out, you''ll have to just melt the solder that is there. The problem is that the pins that run from the wire connector (from the wiring harness) to the circuit board are often cold solders where the solder didn''t flow and bond properly to the contacts on the board. Re-flow the solder on each pin and I am fairly confident that you''ll fix the problem.

Now, this may not be the problem with your wiper motor, but it is a quick, easy, and cheap thing to try first. In my experience, this has been the entire problem with symptoms almost identical to what you have described, but some have gotten progressively worse after months of inattention.

Here are the pictures for you:

Remove the electrical connector, then remove the two torx screws as identified by the red circles in the first picture. Then loosen the lower screw, but do not fully remove it. You will have to loosen it enough so that the cover can come off. Next remove the circuit board by pulling on the black plastic electrical connector. There are 3 spade terminals just below where the center screw was located. These are the power terminals for the wiper motor. They may release from the wiper motor a little hard so if necessary, pry out on the circuit board with a small screw driver right along the wiper motor.

Once you have the board out, the areas most prone to failure are the ones circled in the above picture. To the right is the main electrical connector solder pads and to the left is solder pads for the wiper motor. If you take a look at them, the way to identify a cold solder is if the surface of the solder is dull looking. Mine looked great so I did not re-solder anything. If yours are dull or you can see cracking in the solder, heat the solder until it flows and then allow to cool off without moving the circuit board or the connector. Any movement while the solder is still solidifying will result in the same problem down the road.

Good luck and I hope this helps!

*EDIT 05JUL08* - moved images to my photobucket account so they would be displayed.

< Message edited by swartlkk -- 7/5/2008 5:33:29 PM >

_____________________________

Kyle-