IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Master Window Switch Problems

Old Apr 18, 2025 | 02:22 AM
  #1  
ProblemIS's Avatar
ProblemIS
Thread Starter
3rd Gear
 
Joined: Apr 2025
Posts: 3
Likes: 0
Question Master Window Switch Problems

I finally signed up and unfortunately my first post will have to be about the time I messed up my $1000 master window switch

In short, I tried to piggyback an ambient lighting strip power cable (negative and positive leads) off of the cable that runs into the switch.

From then on, none of the buttons work. I've already checked the fuses with a multimeter and everything is fine.

The interesting part is that when I was checking the board with a multimeter while it was plugged in and the car was running, I managed to roll down the driver side window, so I assumed it was just a problem with the board.

I ordered an OEM replacement off eBay but it still doesn't work so now I turn to you guys for any input and advice.

Also, I know I messed up and it was a really stupid thing to do. I clearly overestimated my abilities.
Reply
Old Apr 20, 2025 | 05:48 PM
  #2  
playboyjay's Avatar
playboyjay
4th Gear
 
Joined: Apr 2025
Posts: 4
Likes: 0
Default

hey man ever figured it out i’m running into this issue now any help would be appreciated
Reply
Old Apr 21, 2025 | 05:44 PM
  #3  
ProblemIS's Avatar
ProblemIS
Thread Starter
3rd Gear
 
Joined: Apr 2025
Posts: 3
Likes: 0
Default

Originally Posted by playboyjay
hey man ever figured it out i’m running into this issue now any help would be appreciated
I'll call and book it in with an auto electrician. If they figure it out, I'll let you know.
Reply
Old Apr 21, 2025 | 09:25 PM
  #4  
playboyjay's Avatar
playboyjay
4th Gear
 
Joined: Apr 2025
Posts: 4
Likes: 0
Default

Originally Posted by ProblemIS
I finally signed up and unfortunately my first post will have to be about the time I messed up my $1000 master window switch

In short, I tried to piggyback an ambient lighting strip power cable (negative and positive leads) off of the cable that runs into the switch.

From then on, none of the buttons work. I've already checked the fuses with a multimeter and everything is fine.

The interesting part is that when I was checking the board with a multimeter while it was plugged in and the car was running, I managed to roll down the driver side window, so I assumed it was just a problem with the board.

I ordered an OEM replacement off eBay but it still doesn't work so now I turn to you guys for any input and advice.

Also, I know I messed up and it was a really stupid thing to do. I clearly overestimated my abilities.
Originally Posted by ProblemIS
I'll call and book it in with an auto electrician. If they figure it out, I'll let you know.


hey i figured it out the switch doesn’t get 12 volts constant to the switch so go strait to the motor plug and it will be fine i got all my functions back like auto windows and all of them started working you may have to reset the others but holding down then holding up for five seconds hope this helps.
Reply
Old Apr 22, 2025 | 03:27 AM
  #5  
ProblemIS's Avatar
ProblemIS
Thread Starter
3rd Gear
 
Joined: Apr 2025
Posts: 3
Likes: 0
Default

I don't really understand what you mean/what the fix was can you please elaborate?
Reply
Old Apr 22, 2025 | 05:54 AM
  #6  
playboyjay's Avatar
playboyjay
4th Gear
 
Joined: Apr 2025
Posts: 4
Likes: 0
Default

Originally Posted by ProblemIS
I don't really understand what you mean/what the fix was can you please elaborate?
so instead of grabbing power from the window switch grab power from the plug that goes in to the window motor it self the switch doesn’t get enough power to power itself and the light but the motor gets a lot more hope this explains more
Reply
Old Apr 26, 2025 | 10:08 AM
  #7  
Viperx's Avatar
Viperx
Driver
 
Joined: May 2024
Posts: 93
Likes: 27
From: California
Default

Easier to grab power from further down the switch… my car has ambient lighting but I tapped into the 12v for headlights and ground (headlights on = additional ambient on bc if I tapped into the ambient itself I got an issue of the power cutting in half going from P to D) but for me it’s not like Im gonna be able to see my ambient during the daylight anyways
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
WillDrivesAnOldRx
RX - 2nd Gen (2004-2009)
13
Dec 14, 2025 07:16 PM
stoney1997
LS - 1st and 2nd Gen (1990-2000)
10
Apr 17, 2020 05:23 AM
gs300_94
GS - 1st Gen (1993-1997)
5
May 19, 2010 06:55 AM
Leexus
SC - 1st Gen (1992-2000)
3
Aug 8, 2006 04:48 PM


Thread Tools
Search this Thread

All times are GMT -7. The time now is 06:28 AM.