raif281

all of you guys who have done the big 4 can you upload pics of them and what is the 4th wire on the big 4?

nyterydrtuckn26ss

yes it will help more current flow.. 4 gauge wire only holds up to like 1500 watts and ur amp is 2000 so ur starving for power

nyterydrtuckn26ss

big 4 is something the import guys are doing its a trans ground google it

scobar

iTrader: (4)

Big 4:
1. Alternator to positive
2. Negative to chassis
3. Negative to engine block
4. Chassis to block

ibd2328

iTrader: (2)

If you can skim through the washer tank install, you should find a few pics of the big3/4

I went ahead and upgraded the wires on the starter too. The negative/ground on the starter can server as a decent, block ground, but it is always better to do both.

https://www.f150forum.com/f6/extra-b...e-sort-153101/