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Anonymous Posted on Mar 24, 2015

Which Relay/Fuse controls the power windows?

The power windows stopped going up and down to all the windows, from all switches, including master switch. I checked relay #2 under the steering wheel, and it was fine. I replaced the power windows master and sprayed the connectors with cleaners, but to no avail. The power locks and mirrors work fine. Sometimes the windows would all of a sudden work from all window switches, but then the won't. I check for loose wiring in the rubber boot harness attached ti the side of door, but none were loose. Please help!

1 Answer

Jeff Armer

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  • Mercury Master 15,575 Answers
  • Posted on Apr 20, 2015
Jeff Armer
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Joined: Nov 22, 2012
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Did you check for battery voltage at the switch , with a volt meter before you replaced the main driver door switch ? Maybe you'll want to take this to pro ,instead of just replacing parts !
Symptom Chart Condition Possible Sources Action

  • No communication with the smart junction box (SJB)
  • Circuitry
  • SJB
  • REFER to Section 419-10 .
  • A single power window is inoperative - driver front power window is inoperative/does not operate correctly
  • Power window motor regulator and motor
  • Circuitry
  • Window control switch
  • Smart junction box (SJB)
  • Go To Pinpoint Test A .
  • A single power window is inoperative - passenger front, left rear or right rear
  • Power window motor regulator and motor
  • Circuitry
  • Window control switch
  • Go To Pinpoint Test B .
  • All power windows are inoperative
  • Smart junction box (SJB) fuse 30 (10A)
  • SJB circuit breaker 10 (30A)
  • Circuitry
  • Delayed accessory relay
  • Battery saver relay
  • Driver window control switch
  • SJB
  • Go To
PINPOINT TEST C: ALL POWER WINDOWS ARE INOPERATIVE Test Step Result / Action to Take C1 CHECK FOR CORRECT OPERATION OF THE INTERIOR LIGHTS
  • Turn on the interior lights.
  • Do the interior lights operate normally?
Yes
GO to C2 .

No
To continue diagnosis, REFER to Section 417-02 . C2 CHECK CIRCUIT 400 (LB/BK) FOR VOLTAGE TO THE DRIVER WINDOW CONTROL SWITCH
  • Disconnect: Driver Window Control Switch C504b.
  • Key in ON position.
  • Measure the voltage between the driver window control switch C504b pin 4, circuit 400 (LB/BK), harness side and ground.
    >
  • Is the voltage greater than 10 volts?
Yes
GO to C4 .

No
GO to C3 . C3 CHECK CIRCUIT 400 (LB/BK) FOR AN OPEN OR SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: SJB C2280c.
  • Measure the resistance between the driver window control switch C504b pin 4, circuit 400 (LB/BK), harness side and the SJB C2280c pin 17, circuit 400 (LB/BK), harness side; and between the driver window control switch C504b pin 4, circuit 400 (LB/BK), harness side and ground.
    >
  • Is the resistance less than 5 ohms between the driver window control switch and the SJB; and greater than 10,000 ohms between the driver window control switch and ground?
Yes
Go To Pinpoint Test H

No
REPAIR the circuit. TEST the system for normal operation.

5 Related Answers

richrobi

Richard Robinson

  • 15 Answers
  • Posted on Jan 07, 2009

SOURCE: power windows wont work

All things Capri are at //www.techcapri.com/
The manuals are there - check them out ...
Wiring diagrams are there. Probably fixed by now anyway.

Regards
Richrobi

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Anonymous

  • 4 Answers
  • Posted on Jan 27, 2009

SOURCE: power windows stopped working on '03 mountianeer

There may be a relay or perhaps a switch to replace in the panel that houses the window switches on the driver's door. That panel comes off by prying it up from around the switches. You will see all the wires and perhaps the relay to replace when you pull it away from the door itself. The switches should simply unplug and you can replace whatever looks burned out.

Anonymous

  • 3533 Answers
  • Posted on Feb 12, 2009

SOURCE: 1999 Mercury Mountaineer power windows not working.

check the relay in the box under the hood and also make sure no one turned the button off to all the window controls on the driverside door panel

Anonymous

  • 783 Answers
  • Posted on Mar 13, 2009

SOURCE: power windows went out

The power window system operates under the control of the accessory delay relay. For early build vehicles, the GEM will energize the relay to provide power to the power window system. For late build vehicles, the ICM(instrument cluster module) will energize the relay to provide power to the power window system.

Now it does not state the build date cut off in shop manual. So if it is an early build Fuse No.6(60amp) in Battery junction box feeds a circuit breaker that mounts under the hood on the fender apron at the firewall on driver's side(wire colors will be BK/WH and YE/LG).Then it feeds the switch side of the accessory delay relay in the Central junction box. Fuse 17(15amp) in the central junction box feeds the switch side of this relay.

The late build system is the same except instead of the circuit breaker on the left fender apron it uses fuse no. 47(30amp) in the battery junction box.

Now you can go to this website and pick owner guide on left task bar,input your vehicle info and pick get owner guide. Then pick the 6th owner guide printing and go to page 210 for the accessory delay relay location. You will see all the fuse information starts on page 207 thur 216.

raj somaiya

  • 5370 Answers
  • Posted on Jan 11, 2011

SOURCE: Sun roof is not powering.

Are you confirmed that its a power problem to sunroof so its not working.Because in 1999 Mercury Cougar and 2000 Mercury Cougar model there is problem with sunroof assemblies.There is a plastic piece which gets cracked and sunroof stops working.To understand the design flaws in the sunroof, you first need to understand how the transport mechanism in the sunroof works. The sunroof is moved along its tracks by two arms. Each of those arms is attached to a metal guide that moves inside the track, controlling the sunroof tilt and its position on the track. Each of the metal guides is connected to the gears that are driven by the sunroof motor. In the 1999 and 2000 Mercury Cougar, those metal guides are each connected to the gears by a small piece of plastic. (Yes, a piece of plastic.) Often in an alarmingly short period of time, the plastic becomes insufficiently strong to withstand the strain of the sunroof weight (when open) and the strain of opening and closing the sunroof, and one or both of these pieces of plastic break, causing the entire sunroof to be non-functional.-------------- For more details on this problem ,Please click on the link below:--- http://www.cougarsunroof.com/faqs.php --------------- Keep updated.Thanks.Helpmech.

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Oct 28, 2009 - My passenger side window is not responding to either the driver side orpassenger side switch. It is in the up position and wont go down.
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Tried it today and none of the windows work from master switch on drivers side except ft passenger window, which went down but will not go back up.

You can't put up the front passenger window with it's own switch ? Did you check the POWER WINDOW RELAY in the instrument panel fuse / relay box ? An you checked POWER fuse 30amp same fuse box ? All window switches have direct power from power window relay !
Fuse Block - Instrument Panel
Left of the Steering Column, behind the storage Compartment
P/W Relay
--
Sunroof Switch Assembly, Window Switch - Left Front, Window Switch - Left Rear, Window Switch - Right Front, Window Switch - Right Rear
1helpful
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What could cause my power windows not to work?

Usually it is in the drivers window controller.There is a module that usually goes bad.
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The windows on my crv wont work

at all stations?
all fuses, in both boxes. (did you read the operators guide to find them,
some cars have a circuit break (thermal) for windows,
and is located in the fuse box.
all this info is at alldata.com
ill look. ill respond , as you are a pro DIY person, can read schematics. if not , its just a guessing game.
IT IS a FUSE, not a breaker. but each motor in door has CB.
UNDER HOOD 40am Fuse #13
then fuse 23 underdash and fuse 8 same.
then the relay.same place.
and the relay is controlled by, master station (drivers)
the driver location doesnt need the relay to work.
the relay feeds power to all other window controls
so the master station is unique.
log in to alldata.com and see the pages on power windows.
here are some tid bits.
battery pull warning

Resetting the power window control unit is required after performing the following procedures: Disconnecting the battery, Removing the No. 6 (7.5 A) and/or the No. 23 (20 A) fuses from the under-dash fuse/relay box or disconnecting the driver's door wire harness.
and
window relearn/reset.
Control Unit Reset
  1. Turn the ignition switch ON (II).
  2. Move the driver's window all the way down by holding the driver's switch firmly down; when the window reaches the bottom, hold the driver's window switch firmly down for 2 seconds.
  3. Move the driver's window all the way up by holding the driver's switch firmly up; when the window reaches the top, hold the driver's window switch firmly up for 2 seconds.
  4. If the window does not work in AUTO, turn the ignition switch OFF and repeat the procedure.
  5. Check the window and power door lock operations

1helpful
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My 96 Toyota Camrys windows don't go down or the

You need to see a wiring diagram to see how the ignition switch allows or sends power to that 30 amp fuse. The switch may turn on a relay (maybe the ignition relay) that sends power to the fuse panel. Or the run wire out of the switch may itself turn power on at the fuses. You may have a loose connection behind the fuse panel.
Get a test light, pull the fuse, and check for power at the fuse terminals, with key on. One terminal for the fuse should have power. If not, power is lost between the ignition switch and that fuse. If it does have power, and windows still don't work, check the wire from fuse panel to the master switch-loose or poor connections, maybe a partially broken wire. If it looks good, check the ground wire for the windows. The ground wire originates at the master switch and will go back into the cabin to a nearby ground, possibly behind the left kick panel. If still no help, someone may need a volt- ohmmeter to start checking continuity of wires, voltage drops, etc.
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Cant find fuse for power windows?

According with the Explorer Owner Guide, I suggest...
1. Check for power on the Light Blue/Black (LB/BK) wire at the master window switch.
2. Check for a good ground to the master window switch on the Black (BK) wire. This wire provides the ground circuit for all of the window motors.

If both of these are good you probably have a bad master switch(drivers master switch).

The Light Blue/Black (LB/BK) wire gets its power supply from the accessory delay relay in the Central Junction Box (CJB) located under the instrument panel. The Generic Electronic Module (GEM) controls activation of the accessory delay relay. Fuse 2.17 is a 15 amp fuse in the CJB which supplies power to the relay. Fuse F1.6 is a 60 amp fuse in Battery Junction Box (BJB) which also supplies power to the accessory delay relay. G400(ground) is located at the driver side rear of the vehicle near the tail light assembly. This connection provides a ground for the master window switch (click image for zoom).

zjlimited_780.gif


For additional details, i suggest try to look and obtain this 2002 Explorer Owner Guide 6th Printing (English).

Hope helps.
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All power windows and sunroof will not budge suddenly on neither the drivers master switch or any of the door window switches. Power locks DO work though. I replaced all 10 and 15 amp fuses in fuse box,...

Window fuse's and relay's may be up under driver or passenger side dash or behind glove box, under the hood and even under the seats, and finally on the ends of the dash. All passenger power windows and locks are controlled thru and get power from the master control switch on the drivers door.

Drivers door window gets used the most so it could be the motor, window switch, relay or fuse.
Could also be a broken wire in the rubber boot going from the door to the body. You will have to eliminate each till you find the culprit. Check that all switches return to neutral when released.
The motor and the relay are the most likely to cause this problem. Try swapping the relay with a working window relay. If it still doesn't work, remove the door panel and remove the window motor.
Turn the motor shaft in both directions by hand several turns. Then plug the motor in and see if the switch will now run the motor. Sometimes that's all it takes to get it working again. I have had to do this with brand new motors. If voltage is not present at the motor connector, either a bad switch or a broken wire exists. Make sure to check for voltage coming to that windows switch. Actually, GM use's a circuit breaker type relay for each window and one fuse for all the circuit breakers.

Try this....
Open the door, turn the key to the ON position without starting the engine and everything that makes noise is off. Lean down placing your ears close to the bottom center of the door or at the speaker grill. Press the window switch UP and DOWN. Listen for the window motor. If heard the drive is damaged. If not heard, turn key off and locate and replace the relay with one of the other window relays. Check window again. If it works now, get a new relay. More often than not, removing the motor and turning it by hand will get it working good as new. I have had to do that with Brand New motors! So try it.
If all has failed, with the door panel still off, check for voltage at the motor connector when pushing the window switch. No voltage means its the switch, especially if its a auto down or up switch.

Check the master window control panel on the driver's door. There is probably a lockout switch. It may have a window outline on one end and the same outline with an "X" over it on the other. Press the outline without the "X" and all your windows should work again. As silly as that sounds, a lot people hit that switch without knowing it. Also, if that switch(lockout) is faulty, none of the windows will work. That happens A LOT!!

0helpful
1answer

All windows but drivers won't go up or down 2001 GMC yukon

If they sound like they are trying to do something it's not the lock out switch . But to be sure pulling out the switch an testing for B+ voltage to and from the switch . Plus pull the other door switches to see if they have B+ voltage and good grounds would be the thing to do.. If you don't know how to check automotive electrical circuits your best bet , take it to a qualified repair shop .
Passenger Power Window Operation
The passenger power window switches incorporate window up and down relays. The relay coil feed and supply sides are powered through the RAP fuse supply voltage circuit. The normally closed contacts of each relay is connected to ground. The load side of each of the relays are connected to either side of the power window motor through the power window up and down circuits. The up and down relay control circuits are connected to the normally closed contacts of the passenger window switch. These contacts are wired in series with the power window master switch, through the power window master switch up and down signal circuits and then to ground when the power window master is placed in the up or down position. This allows for the up and down operation of the passenger power window from the power window master switch. The center pole of the passenger power window switch is also connected to ground and will energize the relay when placed in the up or down position.

Driver Power Window Operation
The driver power window is unique from the passenger power windows in that it does not use window up and down relays. The driver power window is operated directly from the power window switch.
The normally closed contacts of the switch are connected to ground and the center pole is connected to the RAP fuse supply voltage circuit. By placing the left power window switch in the down position, voltage is applied to the power window motor left front down circuit and to the power window motor. The other side of the power window motor is connected to ground through the normally closed contacts of the left power window switch through the power window motor left front up circuit and drives the window down.
By placing the left power window switch in the up position the polarity of the motor is reversed and the motor drives the window up.

Has circuit breaker for B+ power
• PWR WDO CB 25A (fuse block) (System power for left and right windows 2-door vehicles. System power for LF and LR windows 4-door vehicles)
• PWR WDO CB 25A (IP wiring harness junction block) (System power for RF and RR windows 4-door vehicles)

Could be passenger door switch .
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Switch window master

You have a short circuit in the window circuits or a bad motor. They quit working because they are on a circuit breaker instead of a fuse. After the circuit breaker cools down, the windows start working again. You might be able to isolate the problem to a certain door if it only does it when you try to roll down a certain window.
0helpful
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Rear side windows

This may be just a case of inadvertently hitting the window lock out n th driver door window switch by mistake. Check that first. Here's some background on window operation

Principles of Operation
The driver power window regulator motor is controlled directly by the master window/door lock/unlock switch (and its integrated "auto down" module). Power is supplied to the power window relay and the master window/door lock/unlock switch, and the passenger power window switch when the SEC/timer module grounds the coil side of the power window relay. The SEC/timer module will ground this relay when the ignition is in the ON position and will remain energized for approximately 15 minutes or until the driver or passenger door is opened.
The driver power window regulator motor is a reversible motor that is operated by applying power and ground to the motor leads to lower the window, and then reversing polarity on those leads to raise the window.
The passenger power window regulator motor is controlled directly by the passenger power window switch and can also be controlled by the master window/door lock/unlock switch. Power is supplied to the power window relay and the master window/door lock/unlock switch, and the passenger power window switch when the SEC/timer module grounds the coil side of the power window relay. The SEC/timer module will ground this relay when the ignition is in the ON position and will remain energized for approximately 15 minutes or until the driver or passenger door is opened.
The passenger power window regulator motor is a reversible motor, which is operated by applying power and ground to the motor leads to lower the window, and then reversing polarity on those leads to raise the window.
The power rear quarter glass is also directly controlled by the master window/door lock/unlock switch. The power rear quarter glass power latches also utilize reversible motors. The power rear quarter glass power latches are operated by applying power and ground to the motor leads to open the window, and then reversing polarity on those same leads to close the window.
Symptom Chart Condition Possible Sources Action
  • All windows are inoperative
  • BJB Fuse:
    • F20.
  • Circuit.
  • Power window relay.
  • Front door power window switch.
  • GO to Pinpoint Test A .
  • Single power window is inoperative
  • Front door power window switch.
  • Front door power window regulator.
  • Circuit.
  • Driver door power window switch.
  • GO to Pinpoint Test B .
  • Vent power window is inoperative — quarter window glass power latch
  • Circuit.
  • Quarter window glass switch.
  • Quarter window glass power latch.
  • GO to Pinpoint Test C .
  • The one touch down feature is inoperative
  • Master window regulator and door lock switch.
  • INSTALL a new master window/door lock/unlock switch. REFER to Switch—Master Window Door Lock/Unlock .
  • The back window will not defrost
  • CJB Fuses:
    • F30 (10A).
    • F32 (20A).
    • F34 (20A).
  • BJB Fuse:
    • F27 (45A)
  • Circuit.
  • Heated back window switch.
  • SEC/timer module.
  • Rear window defrost relay.
  • GO to Pinpoint Test D .
  • The back window defrost will not shut off automatically
  • SEC/timer module.
  • Circuit.
  • Rear window defrost relay.
  • GO to Pinpoint Test E .

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