Help with Amp Ground in Trunk - Toyota Yaris Forums

Meldav86 · 03-21-2007, 12:37 AM

So i'm installing one amp in the trunk to power the sub, i have the power routed from the battery, all fuses are good, and the remote wire connected but the amp just won't power on. I'm almost sure it's just a bad ground. I used the bottom right bolt in the picture. I used a dremel to expose some metal. I don't know if it has anything to do with it but the bolt screws into a plastic piece. If anyone has any insight to trunk grounds please help. I think what i will try is maybe one of the seat bolts, but what kind of socket does it require as it is shaped different. Do i need torx sockets?

jdubau55 · 03-21-2007, 04:40 PM

Thats where I grounded mine except on the lower left of that pic. I got the metal good and clean and had the same problem as you. So what I did was put a washer between the plastic on the ring terminal underneath. Also I took the edges off the black plastic piece that is in the edges to make sure my ring terminal touched all the way around. I didnt take all the edges off it just enough so my ring terminal would sit flush all the way around. After that I had no problems.

PS: I couldnt find a washer so my "washer" ended up being a pop can tab. Hey, it worked.

Kitt · 03-21-2007, 08:31 PM

check one of the tail lamps ground, it may work...

earljail · 03-21-2007, 09:36 PM

Technically, you shouldn't use a bolt for something else for the ground. I sanded down an area, drilled a hole, and used a sheet metal screw.

But I don't think your problem is the ground. Double check your remote wire to see if it's putting out (hehe). If you don't have a voltmeter, use a jumper(a small piece of wire) and hook up the remote input to the battery input on the amp.

tekmoe · 03-22-2007, 10:57 AM

had to drill a hole into the chassis. didn't sand it or anything. sub sounds great.

Kitt · 03-22-2007, 01:31 PM

ouch...

03-21-2007, 12:37 AM	#1
Meldav86 View User's Garage Drives: 2007 Blzng Blue Yaris Liftback Join Date: Nov 2006 Location: Seattle, Washington Posts: 52	Help with Amp Ground in Trunk So i'm installing one amp in the trunk to power the sub, i have the power routed from the battery, all fuses are good, and the remote wire connected but the amp just won't power on. I'm almost sure it's just a bad ground. I used the bottom right bolt in the picture. I used a dremel to expose some metal. I don't know if it has anything to do with it but the bolt screws into a plastic piece. If anyone has any insight to trunk grounds please help. I think what i will try is maybe one of the seat bolts, but what kind of socket does it require as it is shaped different. Do i need torx sockets?

03-21-2007, 08:31 PM	#3
Kitt View User's Garage Drives: Thndr cl metallic HB 3 drs '05 Join Date: Mar 2006 Location: Panama City, Panama Posts: 793	check one of the tail lamps ground, it may work... __________________ 10 years... alive and kickin'!!

03-22-2007, 10:57 AM	#5
tekmoe ex-yaris owner View User's Garage Drives: 08 solstice gxp, 06 triumph s3 Join Date: Oct 2006 Location: dallas, texas Posts: 344	had to drill a hole into the chassis. didn't sand it or anything. sub sounds great. __________________

03-22-2007, 01:31 PM	#6
Kitt View User's Garage Drives: Thndr cl metallic HB 3 drs '05 Join Date: Mar 2006 Location: Panama City, Panama Posts: 793	ouch... __________________ 10 years... alive and kickin'!!

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03-21-2007, 04:40 PM	#2
jdubau55 Drives: 2007 White Yaris LB 5 Spd. Join Date: Feb 2007 Location: Blacksburg, VA Posts: 451	Thats where I grounded mine except on the lower left of that pic. I got the metal good and clean and had the same problem as you. So what I did was put a washer between the plastic on the ring terminal underneath. Also I took the edges off the black plastic piece that is in the edges to make sure my ring terminal touched all the way around. I didnt take all the edges off it just enough so my ring terminal would sit flush all the way around. After that I had no problems. PS: I couldnt find a washer so my "washer" ended up being a pop can tab. Hey, it worked.

03-21-2007, 09:36 PM	#4
earljail Drives: 07 Yaris Hatch 5speed Join Date: Nov 2006 Location: BC, Canada Posts: 146	Technically, you shouldn't use a bolt for something else for the ground. I sanded down an area, drilled a hole, and used a sheet metal screw. But I don't think your problem is the ground. Double check your remote wire to see if it's putting out (hehe). If you don't have a voltmeter, use a jumper(a small piece of wire) and hook up the remote input to the battery input on the amp.