No relay
Trending Topics
If a wire is shorting to ground without going through a fuse, it will get extremely hot and burn through if current flows long enough, sometimes taking only a few seconds. If a short exists on a fused circuit, then the fuse gets too hot and quickly melts the element inside, thus breaking the circuit and protecting the wires of that circuit.
Copy and pasted from an electrical website.
The Best V8 Stories One Small Block at Time


