[parkero801]

Need help finding out whats this wire. Planning the big 3 upgrade soon
1) alternator positive to battery positive
2) battery negative to chassis
3) engine ground to chassis or battery negative.

now I Located all the wires I need To Replace But there was another wire from the battery + leading some where else down in the engine. I wanna know whats it for before i mess around with anything

got my 4 gauge running to an amp powering the door speakers.(upgrading battery too) of course you can see the 8 gauge running to the fuse box. thinking of replacing that with 4 gauge too. then I highlighted the other + wire leading down

(engine is 4.7) slt

 

[GWhaley]

Goes to the starter......

 

[loudrango]

x2.goes down to the starter.