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Power latch relay - 2006 Citroen C8 2.0

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What parts do I need to fix my 2004 GMC Envoy XUV's tailgate door? It will not open. It opened once a month ago, at a thrift store. but not since. Window works just not the tailgate. Help! TY


The endgate uses an electrical latch system. The latch system contains 3 separate electrical latches that are located on the upper left corner, upper right corner, and lower left corner of the endgate. The latches latch when battery voltage is removed. The latches will unlatch, or release when battery voltage is applied. The latches work in conjunction with a dual pivoting hinge located on the lower right corner of the endgate to allow the endgate to swing open from the left to right for access and cargo loading, or to drop to extend cargo space.

Do you know what diagnostic trouble code's are ? An electronic control module controls the unlocking of the tail gate an when problems like not opening happen ,DTC'S set in the endgate module ,pointing to the problem . Need sophisticated diagnostic tool to check it .
DTC B3745
The endgate control module supplies voltage for the endgate latch relay coil control circuit to the endgate latch relay. This output is used to energize the endgate latch relay when an endgate swing latch or drop latch request has been made. If the endgate module detects an open or short to ground on the endgate latch relay coil control circuit when a swing latch or drop latch request is made, a DTC is set.
Remove the endgate latch relay.
Connect a test lamp between the endgate latch relay coil control circuit of the endgate latch relay connector and a good ground.
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, command the endgate module to swing endgate.
Does the test lamp illuminate?
DTC B3967
The endgate module monitors the lower left endgate latch actuator and upper right endgate latch actuator circuits. When the endgate module detects an open or short to ground on the lower left endgate latch actuator and upper right endgate latch actuator circuits, a DTC is set.
You could try replacing the endgate latch relay . Do you know what a relay is ? Video's on youtube showing how they work an how to test . The only thing is , the relay is inside the endgate ,need to take trim panel off .Video's on youtube for that too , probably .

Sep 27, 2017 | GMC Cars & Trucks

1 Answer

Power Doors are not working properly.


If the relay was at fault none of the doors would work at all. I suggest you may have defective door lock actuator motors and stick door latches, they are very prone to this kind of failure if the door latch gets hard to activate from dirt or corrosion. Make the door latches move freely.

May 17, 2016 | 2010 Mazda CX-7

1 Answer

Where is the location of BMW 5 series Trunk release relay


Hi DK
the relay that powers to boot motor release is in the boot section of fuses and relays, it is number F53 relay
hope that helps

Dec 11, 2014 | 2006 BMW 530i Sedan

1 Answer

I read that cooling fan relay (high & low) should have power to two leads in plug. Is this true? 1996 Escort fan wont run (no power)


Most relays have to sides a low side or coil side and a high side which is the latching side. The low side receives power from it source and when grounded it creates an electromagnetic field which pulls on the switch to latch it on and allow power to go fom the power source to the load being powered.

May 08, 2014 | 1996 Ford Escort 4 Door

1 Answer

GMC Acadia Power Lift Gate Not Working


Will require a scan tool to check for codes, make sure latch is working well, make sure release switch is getting signal. Most common concern is the latch itself though

Jan 19, 2014 | 2008 GMC Acadia

1 Answer

Rear hatch door of2004 toyota sienna xle will not open electrically


Operation of the power back door is controlled by the power back door ECU and the power back door drive unit. Either or both units could be defective.
If the I/P indicator is falsely on, there could be a problem with the body ECU or as a result of failed communication with the power back door ECU and the power back door drive unit.

Jun 24, 2017 | 2004 Toyota Sienna

1 Answer

WHHY IS THERE NO POWER GOING TO THE FUEL PUMP RELAY OR THE CHECK RELAY


sometimes its because of an aftermarket alarm system or a natural gas system. they both latch on to that circuit to deactivate the pump.

Feb 27, 2013 | 1990 Nissan Hardbody King Cab

1 Answer

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 .

Jan 28, 2009 | 1999 Mercury Villager

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