I'm installing an amp in my 97 B4000 and need to get a power wire from the battery to the extended cab portion. Any ideas/suggestions/proven methods of getting a 8ga power wire through the firewall without drilling? It looks like I *might* be able to share the hood latch release grommet but it maybe not. That's my main question. I'm also open to suggestions for mounting and grounding the amp. I do not want to mount it to the sub - vibrations = bad, plus it's one-stop shopping for potential thieves. Thanks.

 

There are grommets in the floor pans you can use. Both my amps power wires went through the firewall grommet though, it's a tight fit, but it will work

 

Thanks. Errr, where are they, more or less?

 

When looking at your pedals, just to the right of the E brake on the firewall, there will be other wires going through there

 

Haven't used it for wiring, but when I was welding up my rockers (at the bottom of extended cab) I noticed there was an oval grommet near the bottom of the door pillar, towards the front of the extended cab section.

 

Thanks grandmas77f150, that did it.

 

Glad to help. I have a 4 gauge and 8 gauge power wires running through that grommet along with all my other cables

 

I can see daylight through it. Do you have any issues because it's not watertight?

 

I haven't had any yet, I had water come through the grommet on the floor pan though, I fixed it will silicone and bedliner