Question about 1999 Buick Park Avenue

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Rear defroster The rear defroster stopped working but the switch lights up is it the fuse relay or modual please help thx Jon.

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  • Master
  • 887 Answers

None, if it lights up then power is going to the defroster. the problem is that you have a small tear in the defroster grid

Posted on Nov 22, 2013

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75822 Answers

SOURCE: Heater air not working. " rear defrost is working"

the problem is causes by a defective temp control blend door actuator, this is deep in the dash, to access it you must remve the dash assembly.

Posted on Dec 17, 2008

  • 1 Answer

SOURCE: rear window defroster, no driver heated seat

check the ground on the passenger side of the rear window under the trim panel. That is what was wrong with mine.

Posted on Jan 27, 2009

dumbtrucker
  • 102 Answers

SOURCE: rear defrost on 1999 buicl park ave

Jeff, If you have already checked the fuses, check the wires attached to the defroster Grid. You may be able to see them inside the rear window. Make sure they are still connected. You might also want to check in the trunk the wires may run into it, and might have peen pulled apart when you put somthing in the trunk. As a last resort take a continuity tester and check the grid itself to make sure it hasn't failed altogether. Un plug the wires b-4 you test it to avoid a false reading.

Posted on Apr 01, 2009

  • 6 Answers

SOURCE: Interior lights don't work on 1997 Buick Park Avenue

the fuse box you are looking for is under the dash on the passenger side, you will need to remove the plstic kick plate then look up and a little to the right,you might have to remove three screws located along the rear edge of the panel, when you have the cover off in the upper left hand corner of the fuse box you are looking for a fuse that is marked [ SBM ] this fuse is for you interior lights, there should be extra fuses, in the second row second from the bottom and the third row second rfom the top, you'll know their spares if they pull out really easy and have no metal connectors inside the slots you just pulled them out of.

Posted on May 20, 2009

  • 16 Answers

SOURCE: Have a 1997 Park Avenue

you probably need to replace the bulbs

Posted on Feb 02, 2011

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How come on my 2005 pontiac aztek if i take out the rear defroster fuse (#21) the light still lights up on my dash and the relay still clicks?? Help why did this rear defroster stop working?!?


I found this. Your heated mirror also works off that relay. You can do ohms test on the grid, if the grid is open, no continuity. The auto store should sell a product to paint over the open spot to restore continuity, if you can find the open spot.
Not trying to cause trouble, just killing time. Have a good day.
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2002 dodge intrepid the rear defrost button light is always on my car battery wouldnt stay charged so I took the defrost relay out the light is still on but my car stayed charged next day no charge


Dear Deseree,
I would like to suggest you are on the right track.
Next, try to find the fuse for the rear defroster, and try pulling that. That light may be a lit because of the "instruments" fuse, and if you pull that one, your instruments may stop working.
Fuses are both under the dashboard and also in a black plastic box under the hood of the car near a fender.
I might suggest there are 3 more common things that can cause the battery to drain.
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2) a short in the ignition switch, and
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Buick parkave 1999 rear defroster not working


ther is a break in the window grid. take a closer look

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To whom it may Concern: My 2002 Toyota Corolla real brake lights and front high beam head lights have stopped working while all the light bulbs are still good. In fact they have not power going to...


In the passenger compartment: The Fuse no.# 18 (15A) = rear brake lights

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If the fuse no.# 18 - F18 (15A) is good, check and replace if necessary the brake pedal switch!

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I have a 2003 Alero, replaced relay switch and fuse under the bonet for the rear defrost, all wires hooked up...no lines broke.. rear defrost button lights up , but rear defrost dont work. Are there any...


There is a connector going to rear defrost on the rear window. Disconnect this and check for voltage with defrost on. If this is good, check resistance for the connection to window. This will tell you if the electrical is working or the element is bad for the window if there is a open reading on multimeter.

Dec 03, 2010 | 2003 Oldsmobile Alero

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Where is relay and fuse for rear window defrost

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Rear defroster doesn't work.


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Nov 24, 2009 | 2000 Dodge Neon

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Rear window defogger light lights when switch is pushed but no defogging happening!!! need wire diagram to trouble shoot. can u find any? checked fuses, all good. power seems to be lost after switch. ...


Yes there is a relay, but it is part of the hvac control head. There are two fuses in the system one is labled the hvac fuse it's a 10amp and there is a RR defog 30amp fuse. Those supply power to the hvac control head. Control head supplys power to the rear defroster. There should be a purple wire in c3 terminal D on the back of the control head. See if that has power when you turn on the switch. If it dose not then there is not power out put to the rear defroster. If so then the problem lies further down the line.
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Rear Window, Rear Defrost stopped working


I suspect that the back door ECU (the relay box that you speak of) is bad.
Unfortunatly common.
Here is how you check:
With the Key On, you should have 12 VDC in the Solid YELLOW wire going into the box.
Also, You should have power in the solid BLUE wire going into the box.
Operating the switches should transmit power to the BLUE with RED trace, and the VIOLEt with WHITE tracer.
If you have the right power as described abobe, the box is indeed bad. This is a dealer item only, cannot buy one at the local parts store. Sorry. Hope this helps.

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