project yak

hey i just got some new subs for my 240sx 89 hatchback and i'm having trouble finding a ground to hook my amp up to... any body know of a spot where a definate ground should be?

Dounveeme

just find a spot of usually unseen painted metal and sand the metal off and ground it to that spot. carefull not to make a hole through anything else like brake lines or wires that may be on the other side.

project yak

hey... i figured it out... my remote wire wasn't working right coming out of the back of the head unit so i just wired it into the fuse box...... now i have a little reving noise on the subs.. (annoying sound that gets louder and higher pitched with rev of engine) i played with the RCA cables by the amp but no combination worked ha ha any ideas?

l2aine

Did you by chance run your RCA's next to any power wires? You could be getting interference and it'll sound like that when you rev.

project yak

i ran my power wire on the other side of the car (battery was on other side so it was easier any way) i ran it straight from the head unit over the stearing column near the fusebox (by left drivers foot) under the plastic running board thing and under the back seat to the trunk....... i don't think it was by any power cables but i'll check it out

l2aine

By the way, the same applies to speaker wires too - generally you want to keep speaker wires and/or RCA cables as far away as possible from any power line, whether it's the amp power line, or maybe even a factory wire that you might not have noticed.

You can also try to twist the speaker wire as you run it from front to back.

Let me know how it turns out

project yak

hey quick question.... could it be the remote wire? the remote wire is running next to the rca cable... could the remote have enough power to screw up the signal?

drnovascotia

no.

Dr.

l2aine

double no. The remote wire is low wattage.

Dounveeme

clean your ground area better. and if it still doesnt stop find a new place to ground. if that doesnt work go to a car parts store or walmart and get a ground loop isolator. sounds like ground noise to me.

project yak

yeah i didn't think the remote wire was strong enough to create any noise but hey just checking all the options.... im in school right now and i got work after that but i'll check the ground when i get out..... thanks

s240r

make sure you head unit is grounded well, also make sure your rca wires are not looped around anywhere.