rear defroster switch buzzing

i got a 91 sunbird le(4.0L OHC) the rear window defroster switch buzzes every time it wants me to shut it off. is this normal? i reead in the manual about it and it says it should shut off after about 10 min but it only goes till 5 min then buzzes. shouldnt it shut off by itself? if this is problem plz... can u tell me how to fix it. any comments are good.
thx

shouldnt it shut off by itself?

yes it should definetely shut off by itself, i would guess you just need a new switch

would u know where i would be able to buy a new one that is cheap? i seen one on rockauto.com for 108.00. should i take a chance and go get one from a junkyard. i think it would be better to get a new one.

i found one at rockaut with a delay which i could use(would it be the same size to fit in old slot?) it is 176.00. might get this one. the other one that doesnt have dalay for wiper is 62.00. i think i would fo for the one with the dalay. http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=1&acpartnbr=D6394C



http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=1&acpartnbr=D6392C

would their be a different hook up on the back of the switch for the pins?

are u sure it would be the relay? wouldt the thing not work if the relay was bad?

muff34
AF Newbie



Join Date: Oct 2005
Posts: 33 Re: rear defrost switch buzzing

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I Had the same problem with mine ,I just did not bother to fix it. I just shut it off when it started to buzz. Judging by all your posts It sounds as if You found your self a money pit to throw ALL your money into . This is just your first car and everyone had a first car ,do yourself a favour keep it safe brakes ,steering etc etc but don`t waste alot of money on other things ,door seals and things like that . The car is old and you will never get your money back out of it when you go to sell. I had a `91 also and it was a good one but you have to where to draw the line as far as repairs go. just my two cents. Good Luck with your Car
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01-30-2006, 04:21 PM #5
|WYG|SS
AF Regular



Join Date: Jan 2006
Posts: 50 Re: rear defrost switch buzzing

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well i bought the car for 400 because the quy was a mechanic and it saaat their for a while and the car had a SH!T load of cigeratte ashes in it and smelt bad so i cleaned it and it runns goood with 130k. i think it would be good to get the expensive switch becasue then i dont have to wory about pushing the wiper button on every time i need to see in the rain. the delay on the switch would be better casue then if i want delay i dont need to cut wires and put a delay switch in. it would save a lot of time and money cause if i screw up then i need new wires.

ive looked on recal lists and i seen that they have recalled the switch in 94.

i can guarantee you, with the symptoms youve listed, that it IS your switch, personally if i had a 15 yr old car there is no way in hell i would put $176 just for a fucking rear defroster, i wouldnt even put that much into my 98 for just the rear defroster, if it really means that much to you though i would try every junkyard around before spending that much

yeah i was going to do that first i think we will find one at a junk yard.