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1999 Carrera 4 Diagnosing Electrical Short @ Fuse C2


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Good evening everyone. I've been chasing an intermittent short in the ignition/fuel injection (fuse C2) circuit. It's left me stranded a few times and I believe I've exhausted the most common issues. Would anyone be able to share wiring diagrams for the ignition, fuel injection, DME systems? 

 

Here are the things I've eliminated already: 

 

-Replaced ignition switch

-Replaced all relays in both relay panels  

-Unplugged all four O2 Sensors = C2 fuse still shorts

-Unplugged both Camshift solenoids = C2 fuse still shorts

-Unplugged DME/ECU = C2 fuse still shorts

-Unplugged Immobilizer under driver seat = C2 fuse still shorts

 

I thought this intermittent short was fixed six months ago when I replaced the engine but now the 30amp fuse either blows as soon as I put it in the panel without the ignition on or blows as soon as I turn the key on. I think I can figure this out with some good wiring diagrams. 

 

Thanks, 
Jethro    

 

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