Blower Relay

[B1Toad]

When a component(s), the wiring/harness or connectors heat up and melt; there is usually an underlying reason whether is dirty/loose contacts/connections or a component drawing too many amps due to resistance in the circuit/component(s).
You have found A problem (burned relay), but you may have not found THE problem.
What has caused that problem. ?
I would continue to investigate to see what caused the burned relay OR.... you may find that problem reoccurring....

With the list of everything he replaced in post #1 I think there's a good chance he eliminated the problem. The fact that there was overheating both on the positive and the negative side of the circuit indicates to me excessive current draw which may have been fixed with the new blower.

 

[CharlesHS]

With the list of everything he replaced in post #1 I think there's a good chance he eliminated the problem. The fact that there was overheating both on the positive and the negative side of the circuit indicates to me excessive current draw which may have been fixed with the new blower.

You make a good point; lets hope replacing all those parts resolves his problem.