In most cases controlled by rear window defogger switch
In most cases controlled by rear window defogger switch
It's the driver's window defogger
Not sure about the '76, but the rear window defogger switch on my 1970 Coupe is located at about seat level on the left side of the center console (tunnel) cover. It is about 6" to 7" off the floor and just under the dashboard.
Some rear window defoggers are filaments built into the rear window that heat up when the rear defogger is turned on. This type of window should not be scraped with an ice scraper.
In my case the switch to the defogger was fried and had to be replaced. I would first determine where the problem is, then get a haynes manual and see how hard it might be to fix the problem yourself. If you can't do it then take it to the dealer.
Ervin baran
Turn on the ac if you have it.
Turning the switch on closes the circuit, running 12V power through the grid of lines on your rear window at low resistance. Heat vaporises the 'fog' on the window, and you can see, hopefully.
The heated mirrors on my 1999 Subaru Forester are controlled by the rear window defogger switch which is located in the dashboard console above the heater controls and to the right of the hazard flasher switch. I'm not sure whether the heated mirrors were optional on the early Foresters or not. Anyway, the heated mirrors (and the rear window defogger) will stay on for about 15 minutes when you press the switch. You can turn them off before then if everything has defogged already. Also, the switch only works with the ignition on.
Not sure of the actual intent but in the S10 Blazers the power heated mirrors are turned on with the same switch that turns on the rear window defogger
Not all 91 Caprices came with rear window defrosters. You have to look in the glass in the back window to see if it has the small wires inside. The switch is usually on the right side of the climate control panel under the radio.