Question about CRL Fixed "All Glass Look" Window - Driver Side Rear 1997+ Chevy/GMC Vans 4

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Rear defogger doesnt work. i checked the connectors, the grid lines, the realy and the fuse. all are in good condition. what can i do. i have a 2003 chevy imapla

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I have a 95 Grand Am GT 3.1 rear defroster is not working where are the fuses and relay for the rear defroster


Have you done any testing? If not, find the connector for rear defogger grid, probably in the trunk, somewhere. The purple wire is voltage, the black wire is ground. Turn on defogger, use a testlite between terminals, if the lite comes on, the problem should be with the defogger grid, itself. You can check for continuity in the defogger grid. If no continuity, there is a break in the grid, If you can find the break in the grid, the auto store should have this stuff that you can paint over the break allowing continuity in the grid.

I'm just trying to pinpoint problem.

I'm a jack of all trades and a master of none.

Nov 21, 2015 | Cars & Trucks

1 Answer

Which fuse do I replace for rear window defogger in a 2001 nissan almera


There may be a fuse in the fuse panel under dash, but defoggers are often found with a circuit breaker rather than a fuse. There may also be a relay in the circuit to the rear window. You could pull off the connector at the window, and with key on and defogger switch on, check for power at the connector. If you have power, one of the grid wires on the window may be broken. Kits are available to fix that.
If no power at the window, IDK, may have to find a wiring diagram, or have an electrician or mechanic start looking into it. Good luck.

Dec 30, 2012 | Nissan Almera Cars & Trucks

2 Answers

Need wiring diagram of rear-window defogger circuit for 2008 Chevy Impala LT


i just fixed my car to the exact question above, it took 20 minutes total. yes I\'m good with a wrench, but this fix doesn\'t reqire you to be.

Problem: Rear defroster doesn\'t work, but the fuse is good and the little light comes on on the button.

Answer: Go to front passenger kick panel where the "other" fise box is and remove the pastic panel, it just pops straight up. Under the fuse block is a white plug that connects front wire harness to the rear harness. this is where the problem is. pull the connector off the body, my plugslide straight back. Now flip the whole connector over, there you\'ll see the burnt spot on the plug. losse, corroded connection causes melt down. this stuff happens. my car has a purple wire going into the plug and a black one coming out, this is the rear defroster wire. cut the purple wire aleast a half inch before the plug and cut the black one coming out of the plug the same, always leave a little wire incase you ever want to reuse that terminal, standard rule. now take two butt connectoers and a four inch piece of ten gauge and splice the purple and black wires back together. lots of current so DO NOT use 12-14 gauage wire, it will melt. and Wa-La, its fixed!! since you dont have to do the trouble shooting and chase down the wires like i did, should take you ten minutes to fix.

Now if this doesn\'t fix your car, then don\'t pay me!!

If this DOES fix your car, then take your wife out to dinner with the $150.00 i just saved you from having to take it to the dealer,

(they would sale you new connectors and harness)

Oct 30, 2012 | 2008 Chevrolet Impala LT

1 Answer

1993 honda s/w rear window defrost quit working


Do you have 12 volts to the rear window grid at the grid connector, check and make sure it is attached to the window, it is the single biggest reason for failure.

Feb 20, 2012 | Honda Accord 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

2 Answers

93Toyota Corolla DX > Rear Defogger Inop


If you have a 12 volt test lamp, try this: Turn on the rear defroster. Attach the clamp to a good ground point; the door latch hoop is good)...Now, touch the test lamp to the extreme left and extreme right sides of the grids, on the inside of the glass. If the light does not light in either place, you probably either have a bad defroster relay, or the wires coming to the rear grids is off. Please feel free to get back to me with the results of your test.

Apr 05, 2009 | 1993 Toyota Corolla

1 Answer

2002 Alero defogger


A common thing to fial on these- assumning the grid is ok, and wires are still attched to grid, is the rear def / antenna module. It is behind rt. rear quarter trim panel. The modules burn up, and also melt the connector. the module and connector would need to be replaced.

Dec 06, 2008 | 2003 Oldsmobile Alero

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

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