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Rear window defogger not working on 2001 PT Curiser

After replacing the rear window glass, the defogger stopped working after only a few months. The switch lights up but none of the lines heat up. Do I need to remove the plastic covers to check the connections on the glass?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2001 Sienna rear window defogger doesn't work

There are 3 fuses that control the rear defogger, and 1 relay

The fuses are: 10 amp HEATER, 10 amp MIRROR-HEATER; under the dash
The 30 amp DEF fuse is in the fuse box under the hood
The relay is the DEFOGGER relay, which is on the back side of the fuse panel under the dash

Also, check for a loose wire on the defroster grid (on the back glass), this is the most common problem.


Posted on Oct 20, 2008

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adam_atkins
  • 14 Answers

SOURCE: Rear window defogger not working

make sure the wire connecting to the rear defogger is clean and connected properly

Posted on Dec 11, 2008

  • 22 Answers

SOURCE: how does one replace interior overhead lights?

the plastic lens that you press to turn the light off and on can be remove with a pick or small screwdriver pry from the outer edge of it and it will pop off. the light will come out with the socket by twisting.

Posted on Jan 09, 2009

  • 80 Answers

SOURCE: 2001 pt cruiser

I recently had the same problem with my car. The solution for me was to remove the coolant lines going into the firewall(be sure to let it cool down first)and blow out the heater core with compressed air.I went from blowing barely luke warm air to awesome heat...good luck

Posted on Jan 14, 2009

chryslertech
  • 115 Answers

SOURCE: how do i remove rear power window switch, and

REAR - SEDAN ONLY

  1. Disconnect and isolate the battery negative cable.
  2. Using a trim stick or equivalent, gently pry at the top of the switch.
  3. Remove switch and disconnect electrical harness connectors. 80d2e1b8.gif

Posted on Mar 19, 2009

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Remove


Original equipment rear auto glass is not designed to have the "heating element" removed...these lines are imbedded into the glass during production. If your current rear defogger is not working, you have a few options. You can replace the entire rear glass (very costly), you can add a new aftermarket defogger strip and connect to original equipment wiring...(maybe to many lines for your viewing...or you can add a rear blower motor vent to the rear shelf...(most effective, aftermarket kits are vailable, probably your best choice to address a need for a rear window defogger. Hope this helps.

May 02, 2013 | Cars & Trucks

1 Answer

My 2004 6cfl. Trailblazer rear window defroster is not working. The wires appear to be making a good contact. The outside mirrors defrost ok using the same switch as the test window defroster. Is there...


There is a module that controls the rear window defogger grid . LGM/ EGM Liftgate or endgate module .Receive's message on class 2 serial data network from the HVAC control module to turn it on when button pressed . Fuse # 3 30 amp located in the rear fuse box . Do you know where the rear fuse box is ?
Rear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consist of the following components:
• HVAC control module
• Liftgate module (LGM)/endgate module (EGM)
• Rear window defogger grid
Rear Window Defogger Operation (With LGM)
Battery positive voltage is supplied through the LGM 2 fuse to the LGM for the rear window defogger system. When the rear window defogger switch is depressed, the HVAC control module illuminates the rear window defogger indicator, and sends a class 2 message to the LGM to enable the rear window defogger. The LGM enables the rear window defogger by allowing battery positive voltage to the rear window defogger.
When the rear window defogger switch is pressed for the first time, the defogger cycle lasts 10 minutes. Further operation results in 10 minute defogger cycles.
Rear Window Defogger Operation (With EGM)
Battery positive voltage is supplied through the EGM 2 fuse to the EGM for the rear window defogger system. When the rear window defogger switch is depressed, the HVAC control module illuminates the rear window defogger indicator, and sends a class 2 message to the EGM to enable the rear window defogger. The EGM enables the rear window defogger by allowing battery positive voltage to the rear window defogger.
The following conditions must be met for rear window defogger to operate:
• The end gate glass position is not below the index position.
• The window express down movement is not requested.
• The window down movement is not requested.
If the end-gate glass is not fully closed, the DIC displays "Tailgate Glass Down" when the rear defogger operation is attempted.
When the rear window defogger switch is pressed for the first time, the defogger cycle lasts 10 minutes. Further operation results in 10 minute defogger cycles.

Fuse Block - Rear
Beneath the left rear seat

Jul 13, 2017 | Chevrolet TrailBlazer Cars & Trucks

6 Answers

Hyundai XG350 rear defogger doesn't work. I have changed the relays, checked all the fuses all good, dash switch works because I changed that too. checked the wire to the grid thats' ok too. now what?


The rear defogger is controlled by the Electronic Time and Alarm Control Module (ETACM). It receives a signal from the switch, and if the car is running, turns on the rear window defogger. Most frequently the problem is a blown 30A defogger fuse. Other common problems are the defogger switch itself or the switch not being plugged in properly, but there can also be a bad defogger relay, defective ETACM, or wiring issue. If you're capable of doing some electrical diagnosis, I'd encourage you to register for a free account at www.hmaservice.com (requires Internet Explorer and Adobe SVG Viewer) and print the schematic from the site. Also, does the indicator lamp come on when you depress the defogger button,I hope this help you in the right direction now you know how it works

Feb 12, 2010 | Hyundai XG350 Cars & Trucks

1 Answer

Rear window defogger on 1997 SW2 won't work in damp, wet weather


sounds like a short. i would check and see if there is any breaks in the defroster lines in the glass. maybe you have a bad connection

Oct 22, 2009 | 1997 Saturn SL

1 Answer

I have a 1996 mercury grand marquis and the rear defogger is not working. hat could be wrong?


Please rate. Thanks

could be the switch whcih incorporates a relay & timer.

Window, Heated Back NOTE: The radio antenna is integral to the window glass and is serviced with the back window glass (42006) as an assembly.

The heated back window consists of:
  • a series of grid lines baked on the inside surface of the back window glass and system wiring which includes heated back window ground wire (18C620) and heated back window feed wiring (18C619).
  • the grid lines, which consist of two layers. The first is brown as viewed from the exterior, and the second is silver as viewed from the interior.
Power for the back window glass defroster grids, the heated outside rear view mirror and the heated back window switch indicator is supplied from the power distribution box through a fuse HTD BLT (40 A)which protects the circuit.
-------------------------------------------------------------------

Heated Back Window—Crown Victoria, Grand Marquis
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Sep 18, 2009 | 1996 Mercury Grand Marquis

1 Answer

Rear window defogger stopped working


More than likely something has scratched the film that heats up to do the defrosting, Look to make sure it has both wires attached, and use either a test light (make one out of a 12volt bulb and wire if you do not have one.) See if you have electricity to the wires at the ends. If you do, you have a break in the film. You should be able to see where it is broken or scratched. There is an after market repair kit for this, that is not really expensive.

Dec 21, 2008 | 2003 Oldsmobile Alero

1 Answer

Rear window defogger not working


make sure the wire connecting to the rear defogger is clean and connected properly

Dec 11, 2008 | 1993 Buick LeSabre

1 Answer

Rear defogger


check grids along rear window to check for broken lines and check wires on both sides of glass where connections are.

Nov 29, 2008 | 1991 Oldsmobile Cutlass Supreme

1 Answer

Rear defogger


The switch is part of a timer module that controls the rear defogger grid on the glass, they fail and create the problem you described, replace the module.

Oct 01, 2008 | 2001 Saturn L-Series

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