How to by-pass chassis harness?

[YZFR1]

Hello,

i have a '91 talon with a strange problem of not wanting to crank. This is what the car does:

when i turn the key all the accesories come on, when i try to crank the motor, there is one single click at the starter, then everything fades out. If i try to turn the key off and then back on, nothing comes back up at all.

If i leave the car to sit for a couple of days or less and try to turn the key on, all the accesories come back up again until i try to crank, then everything else fades out again.

Tried different alternator, battery, testing the starter, by-passing ignition key and starter relay, unplugging as many things as possible, looking for possible shorts. It is not blowing any fuses but does show a full short on the battery.

I suspect a chassis short. Is there a way i could by-pass chassis harness and run the engine harness as a standalone system?

Or any other advice or tips would be highly appreciated!!

Thank you

 

[redyute1]

Double check your grouds to make sure they're not corroded, especially the main one from the battery negative terminal to the body of the car.