yes a short can cause fuse to blow.
There are 2 kinds of short circuit, a short to power and a short to ground. A short to power can occur within a component or between circuits.
If the short is within the component, the component will not operate properly or may not operate at all.
A short to power between circuits usually result in components operating unintentionally.
This can be due to worn or burned wiring insulation or corroded connectors. Carefully inspect all wiring and connectors in the circuit for damage.
On the other hand, a short to ground will usually cause a fuse to blow as soon as it is installed. However, if the short is on the ground side of the load but before a grounding switch, the fuse will not blow but the component will not turn off. In this case remove the fuse and connect a test light in series between the fuse terminals. If the light comes on, there is a short to ground.
Start at the circuit load and trace the wire to back to the power source.
Monday, February 22nd, 2010 AT 1:12 PM