DIY Modification Dual Electric Horns 03 - 08 Corolla

This is a DIY for a 03 - 08 Corolla changing the OEM horn to a Dual Electric Horn .

The easy way to do this is with the grille off - Just two screws holding it 

Then you can wire it up real simple one is positive the other is ground - Carefully measure the horns so that it can be even - Then ground the ground wire to the vehicle and the positive to the wire that the OEM horn came from .

This is what it will look like and everyone will hear you .

.