My sister has a stock 1996 honda civic ex

NEW BATTERY (Fully charged) I even tested my battery from my working car
New starter.

Car turns on, Headlights work strong, inside ligting. When you hit the key it click on the main relay. and goes dead right away, like there is no battery. I replaced the main relay with a new one, same thing. I put the main relay from my 2000 and it didn't work but it worked for my car. Whats the deal?

The second you turn the car it clicks like crazy, kinda of like the out of battery click but it's coming from the main relay and it won't even turn over.

 

move to civic

 

hjad this problem last year in an accord....i replaced the main relay to no help.....under the hood check the positive lead connections at the fuse box...they tend to come loose sometimes