As always, clean and re-secure all grounding straps,wires,cables, etc. More than likely not the problem but you have to have a good basic full electrical circuit to begin with. Relays are sensitive to a less than optimal circuit.

__________________
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now