Electrical problem
2005 Mazda 3 4 cyl Front Wheel Drive Automatic 55000 miles

Hello,

My horn recently short circuited and wouldn't shut off without disconnecting the battery and/or unplugging the wire. But since the short circuit my power locks won't work, the radio, turn signals, windshield wipers, headlights, and trip meter all either don't work at all or work only when the horn is pressed in. I've heard that this could be a ground problem but don't know where to take my car or how much it would cost to fix. Please help!

Thanks,
Roxanne