How do you fix a short in the wiring to the blower motor?

First you have to do the hard part. Find the short, then fix it. The first thing to do is visual inspection of any burnt wires along the wire harness in the system and check fuses. The easiest way to find a short is to use, or borrow a short finder, but they are moderately expensive, around 50 to 60 $. To use, take out the fuse with battery cables still on, and plug in the pulse unit into the fuse holder. use the meter part and starting at fuse panel move it along the system to the blower motor (start to finish). when a short is detected the needle will stop moving. Check that area for shorted wire or component. This ill work on any systems where a short is suspected. The pulse goes throw sheet metal and body trim. Note: All switches in circuit to be tested must be on.