96 S10 BLAZER 4DOOR FUSE BLOWS OPEING BACK GLASS

didnt specify blazer or pick up -----if pick up check harness to lights at rear for corrosion and or damage

The fuse for the horn can not make it blow.only a bad horn switch/button can do that.The tail light fuse should be marked in the fuse panel.If you have the vehicle manual you can most likely find it in there.

Possible blend air door malfunction.

i have a similar problem but mine is my when i switch my int lights on inside the truck they blow a fuse but will work fine when you open the doors ???

Check fuse for horn and for dash lights. If the interior lights work then suspect dimmer switch for the dash lights. If you press the horn button do you hear a click under the hood or inside the car? If you do not then the fuse is blown and if the fuse is good then the relay may be suspected bad. If the fuse is good and the relay clicks then suspect the horn to be bad. If fuse is blown and you put a new one in and you push the horn and the fuse blows again, then disconnect the horn before replacing the fuse again. Then push the horn button and see if you hear the relay click if you hear a click the the horn is bad or wiring butmost likely the horn. If you have the horn unplugged and the fuse is good and you push thee horn button and no relay click suspect the horn button to be bad. Hope this helps.

should be in the relay box in the engine bay, but how do you now the relay is bad? if it clicks follow the sound

autozone has a $20 haynes owners manual. it will have all the locations and how-to's.

you may want to check the fuse box. fuses blow more often than relays go bad.

radio pull it out maybe its bad.

fire melted other wires blowing more fuses or relays

you may need to put a relay in it as the current from the horn may be back feeding up the immobiliser horn circuit and causing a short. Sounds like the immobiiliser has its own source of power seperate from the factory circuit When you press the horn the power goes to the horn and up the immobiliser horn circuit and it blows the fuse.