81 El Camino with a LS3 and a 3 amp parasitic battery drain.

[kreine]

10-4 ^^^^ on this. You can use a multimeter rather than a test light also, but both will work.

I'll add that in my world a 700 milliamp draw is way too much. It will drain 3 1000cca batteries in less than 2 weeks with that much draw. And in a month ruin the batteries.

from what I have read online that 700 milliamp draw is used by the ecu memory to preserve programming. I'm open to suggestions but I didn't think I had many options where that was concerned.

 

[64nailhead]

Do what Bruce said and record the amount of change of draw per each fuse.

The most likely candidates are the alternator or starter. But a bad relay will do the same if it's corroded internally.

 

[fleming442]

You got other shjt happening. A corroded ground on the relay coil would make it intermittent (more off than on with a drain). I'm out. Good luck