Blown starter relay

[GN]

I was starting my car today and noticed a nice size spark from the negitive batt. terminal. (believe it was the neg. one) And then heard the one click that I know is the starter relay when turning the key. I replaced the relay before and it worked until now. What could cause this? I replaced the battery,voltage regulator, coil, dist. cap and rotor, starter itself and the relay with in the last year. The battery has a higher CCA than the old one. What would cause the starter relay to short out?

[Topher]

Have you performed a voltage drop test across the pos and neg battery cables?

[GN]

How do I do that?

[Topher]

http://www.engine-light-help.com/voltage-drop.html

[b5blue]

There should be no sparking at your battery post...that's a sign it's not making good contact. I'd start right there and check all ground straps on the car first, clean them up and tighten them down.Good luck 

[GN]

The smaller wire coming out of the neg. cable was broken with wire exposed and broke in several places. I installed a new cable with the smaller wire and a new relay. Should this solve my problem?

[FLG]

That could do it. Needs a good solid ground.

Inspect the rest of the wiring and give it a shot.