Quick help on wiring an activation switch!

[Bigturbonotch]

Ok quick question. I am installing a switch that is on and off and lights up. The switch calls for 3 wires. Accessory 12v-only when car is on, power and ground. I have power and ground and the accessory. The accessory is wired to the defroster. As soon as I flipped the switched to the on position the fuse blew. I checked all connections and everything was fine. I dont understand this at all. When I just used the switch without the light it worked fine. I feel much safer when the switch is light up. I am assuming that all 12v sources have the same power so I dont understand why this happend, anyone? Thanks!

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[Flyn]

Ok quick question. I am installing a switch that is on and off and lights up. The switch calls for 3 wires. Accessory 12v-only when car is on, power and ground. I have power and ground and the accessory. The accessory is wired to the defroster. As soon as I flipped the switched to the on position the fuse blew. I checked all connections and everything was fine. I dont understand this at all. When I just used the switch without the light it worked fine. I feel much safer when the switch is light up. I am assuming that all 12v sources have the same power so I dont understand why this happend, anyone? Thanks!

How big is the fuse and how much current does the switch draw for the light? Was the defroster also on? You could try another switched circuit, maybe the cigarette lighter. Could your accessory and power wires be reversed? Maybe you have a short circuit somewhere? Metal touching metal and grounding? Defective switch? Just a few things to check.

 

[Bigturbonotch]

Im not sure how much it draws for light its a little red switch with a light on it. It blew the defroster fuse 15 amps. Dad is an electrition and helped me with this.