Master Power Window Switch Problems

TOYOFAN

MEMBER
1997 TOYOTA 4RUNNER
3.4L
6 CYL
4WD
AUTOMATIC
269,000 MILES

All four door windows, rear window, and door locks are unable to be operated from driver's side master power switch. Power door locks work for all doors when operated from passenger side. Passenger window controls do not work either.
I noticed the 30A breaker for window controls was blown and replaced it. I also took apart the master switch and noticed the switch contacts were blackened, so I purchased a new master control switch. All to no avail. Please help.

6 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,924 POSTS

Hello,

It sounds like the control relay has gone bad, it is located on the lower left side of the dash, check your owners manual to get the exact location.

Here is a wiring diagram for you, pleas let me know what you find.

Best, Ken

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Tuesday, June 28th, 2016 AT 11:48 AM

TOYOFAN

MEMBER
4 POSTS

Hi Ken--thanks for the prompt reply. I just finished replacing what I think was the power window relay (a small black box with 4 prongs in the lower left dash), but unfortunately it didn't help. I rechecked the fuse, but it's still ok. I'm scratching my head on this.

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Friday, July 1st, 2016 AT 1:07 PM

KEN L

MASTER CERTIFIED MECHANIC
42,924 POSTS

Let get a test light and attach it to ground, next with the ignition switch on test the black wire in the relay it should light up. Please let me know.

Best, Ken

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Friday, July 1st, 2016 AT 3:09 PM

TOYOFAN