Fuse keeps blowing
Depending what amperage fuse was blown, ( agreeing with jtarin if you are dealing with the brake lights) Then you could have a possible short to Ground. Meaning that there is a break in the wire insulation allowing the bare wire contacting metal. This Break in the insulation is before the Load ( bulb, motor, etc) Allowing the fuse to blow.
Check wires for cracks and breaks. replace/repair as needed.
×