Re: [electrical] dead defogger

["Owen" <rabeys@cadvision.com>]

I fixed this problem in my car by getting a new defroster switch, and by
doing so i also discovered i had heated mirrors, cool.  Hope your problem
is a simly $5 fix like that.  


Owen
87 16v
http://www.geocities.com/MotorCity/Garage/1571

> 	The rear defogger on my '81 hasn't worked since I bought it and now
> it's getting colder here in SoCal (it's dipped below the 70's *brrr*).
> Fuse appears intact; moreover, the same fuse guards the horn circuit
which
> works perfectly.  I don't detect a voltage drop on my in dash voltmeter
> when the defroster switch is turned on.  When I flip the switch, I
measure
> 12.x volts across the ends of the heating elements.  None of the elements
> appears broken.  I also measure 12V across the positive (driver's) side
of
> the elements and a ground, for instance the bolt on the ends of the hatch
> support struts.  Is this to be expected or does this indicate a short? 
Can
> anyone help me troubleshoot this problem?
> 
> 	Related problem: The voltmeter also registers a 1.5-2V drop when
> the parking lights are turned on.  My relayed headlights only register
> about a 0.5V drop so I'm assuming that there is a resistance bottleneck
> somewhere.  The lights don't seem dim at any corner.  How do I go about
> tracing the trouble spot?  TIA, Happy New Year, etc.  benton-----


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