Wiring gurus needed ?

[dheavychevy38]

So on my 87 k5 the battery keeps getting the life sucked out of it overnight. I removed the battery cable and when you go to hook it back up it sparks bad enough to weld . So I have tracked it down to being the orange wire with the fuseable link comeing off of the juntion block on the firewall. My question is what in the cab has power when the ignition is off ? Or where could I find a wiring diagram ? Thank you in advance.

 

[86chevyk10]

Ive seen wiring diagrams posted on here before. Try searching for "wiring diagrams". I looked in my factory manual for my 86 but I cant find where it has an orange wire WITH a fuseable link. Ofcourse, Im no wiring expert and these diagrams are a b!tch to decipher. Ill keep looking though if no one else chimes in.

 

[dheavychevy38]

Thanks. The wire comes off of the junction block and goes into the back of the fuse box.