Keep rain off your power mirror switch! - Chevy Impala SS Forum
 
LinkBack Thread Tools Display Modes
post #1 of 1 (permalink) Old 07-02-2013, 02:00 PM Thread Starter
Sophomore Member
 
Join Date: May 2003
Location: Huntsville, AL
Posts: 8,211
 
Send a message via AIM to sherlock9c1
Lightbulb Keep rain off your power mirror switch!

FYI - I just fixed an issue on my Roadmaster where the DOWN button didn't work (on either mirror) but everything else worked. If you're having this problem, this should help you:

The Roadmaster power window switch is horizontal and easily collects water if you're not careful about keeping your windows up during rainshowers. The Caprice power window controller is mounted vertically and is much more weather-resistant (the wiring pinouts are completely different, BTW).

I took the controller apart and all switches tested good. Then I plugged it back in with enough room to backprobe the connector pins and started diagnosis. GM designed it such that all wires stay at ground until you push a button which then puts 12V on that wire, causing current to flow through the motor and move the mirror. The 12V feed for the Roadmaster mirror control is the center pin of each 3-pin switch.

As I probed the circuit board, I found no voltage on the center pin of the DOWN switch. I started following the trace and found a break in the trace. Once I made a jumper and soldered it in, everything worked again.

In the process of visually inspecting the circuit board, it appears that water had gotten in and started to delaminate the board in several places from the outside edges in . I made some other repairs to keep it healthy.

Moral of the story - if one action doesn't work for both mirrors, check for 12V on the center pin of the dead switch, then find the break in the trace.

And keep water off your mirror controller!

"The unexamined life is not worth living." - Socrates
sherlock9c1 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome