Sub amp grounding - large bolt in rear cargo area - no idea what it is or does
#1
01-28-2019, 03:29 PM
Sub amp grounding - large bolt in rear cargo area - no idea what it is or does
Looking for a good place to ground my amp in the rear cargo area.
There is small cutout in the carpet in the shape of an upside-down U (when looking at it from inside the rear cargo area) underneath the middle row seats.
It has a very long bolt, a large washer, and under the washer something that looks like a black rubber or foam or plastic disc. Does anyone know what this bolt secures and if I could use it as a ground source?
I've looked everywhere but can't seem to find out what this is. Also, I tried looking under the vehicle, but I couldn't determine what it was holding up.
I've grounded the wire to the rear seats but I think it is an insufficient ground. The sub was working for a day or two, but now won't power on at all. Fuses are intact and power is good. Had the sub tested in a shop this afternoon and it performs fine.
I don't have a large enough star screw to unscrew the larger seat bolts. I'm basically scratching my head as to where to ground this thing.
There is small cutout in the carpet in the shape of an upside-down U (when looking at it from inside the rear cargo area) underneath the middle row seats.
It has a very long bolt, a large washer, and under the washer something that looks like a black rubber or foam or plastic disc. Does anyone know what this bolt secures and if I could use it as a ground source?
I've looked everywhere but can't seem to find out what this is. Also, I tried looking under the vehicle, but I couldn't determine what it was holding up.
I've grounded the wire to the rear seats but I think it is an insufficient ground. The sub was working for a day or two, but now won't power on at all. Fuses are intact and power is good. Had the sub tested in a shop this afternoon and it performs fine.
I don't have a large enough star screw to unscrew the larger seat bolts. I'm basically scratching my head as to where to ground this thing.
#2
01-28-2019, 03:38 PM
#3
01-28-2019, 03:40 PM
#5
01-28-2019, 06:59 PM
The problem I see w that diagram is the location of the middle ground unit towards the rear hatch seems to be up by the power mechanism for the sunroof and the two other rear ones are up and away from the amp. I could possibly utilize the rear right one but the ground wire would need to be a bit farther from the amp then recommended
#7
01-28-2019, 07:31 PM
#8
01-28-2019, 07:57 PM
Camel Trophy
Distance should only be an issue if you're using a smaller gauge negative than positive. Honestly, I would recommend just sanding the paint off and shooting a tek screw (self tapping screw) into the sheet metal where your sub is going to be sitting. Use a washer, I'm sure the eyelet is larger than your typical tek screw head. Those small combos don't draw enough power to warrant anything crazy.
If it makes you feel better to go to a dedicated ground point then just use a larger gauge wire. One size down from your positive wire. Really not necessary though, since the entire chassis is grounded. I've done a lot of automotive electrical, especially sound systems, and I'm a professional electrician for a living.
If it makes you feel better to go to a dedicated ground point then just use a larger gauge wire. One size down from your positive wire. Really not necessary though, since the entire chassis is grounded. I've done a lot of automotive electrical, especially sound systems, and I'm a professional electrician for a living.
#9
01-28-2019, 08:14 PM
Distance should only be an issue if you're using a smaller gauge negative than positive. Honestly, I would recommend just sanding the paint off and shooting a tek screw (self tapping screw) into the sheet metal where your sub is going to be sitting. Use a washer, I'm sure the eyelet is larger than your typical tek screw head. Those small combos don't draw enough power to warrant anything crazy.
If it makes you feel better to go to a dedicated ground point then just use a larger gauge wire. One size down from your positive wire. Really not necessary though, since the entire chassis is grounded. I've done a lot of automotive electrical, especially sound systems, and I'm a professional electrician for a living.
If it makes you feel better to go to a dedicated ground point then just use a larger gauge wire. One size down from your positive wire. Really not necessary though, since the entire chassis is grounded. I've done a lot of automotive electrical, especially sound systems, and I'm a professional electrician for a living.