Need Help!

jhering1986 · Post by **jhering1986** » Fri Oct 23, 2009 10:40 am

Alright so here's the deal: I have a Rockford Fostgate 300 watt amp hooked up to pioneer 6x9's in my car. I've had this hooked up for 4 years now and never had a problem. A few months ago I noticed that the sound from the 6x9's would cut out and then cut back on. I knew it was going to be a problem but left it until finally it went out and stayed out. I checked the fuses on the amp and CD player(aftermarket Pioneer approx. 6 years old) and everything was fine. Checked the fuse on the power line coming from batt. and it was fine. I have the amp ground wire hooked to the chassis and the remote wire coming from the remote wire on head unit. Now here is the weird part: when the car is off,I get 12.5 volts from the batt. and the remote wire and when I connect the power and ground to the amp, I get 12.5 volts but when I connect the remote wire to the amp, the voltage drops 3 volts at the power wire and remote wire. I took a wire and bridged the power input to the remote wire input on the amp and the amp works for a few minutes, but then the sounds cuts on and off when I adjust the volume on the head unit. I bought a new amp and hooked it up and I got the same results so I'm pretty sure the amp is not bad. I also just changed the remote wire also as well as the RCA cables.

Ryan from Ohio · Post by **Ryan from Ohio** » Fri Oct 23, 2009 12:21 pm

Hmmm

So the voltage drops by 3 volts when the amp comes on? now thats odd.

I woulds tart by adding fresh fuses. You may have one on the way out. Change the one on the battery, before the amp and/or on the amp.

jhering1986 · Post by **jhering1986** » Fri Oct 23, 2009 12:54 pm

Yeah, when the power and ground are hooked up, it gets 12.5 volts(when car is off) but as soon as I connect the remote wire, the voltage drops.

Ryan from Ohio · Post by **Ryan from Ohio** » Sat Oct 24, 2009 6:09 am

Sounds like its the head unit then.

jhering1986 · Post by **jhering1986** » Sat Oct 24, 2009 6:52 am

Well here is an update: I went and looked at it this morning and I tested both speakers with a 9 volt battery and they work so I know it's not them. Then I disconnected them and the RCA cable from the amp and tried my jumper again but it didn't work this time. Could it possibly be a bad ground wire?

jhering1986 · Post by **jhering1986** » Sat Oct 24, 2009 12:21 pm

It was the ground wire, must have been loose or something, took it off and put it back on.

Ryan from Ohio · Post by **Ryan from Ohio** » Sat Oct 24, 2009 12:31 pm

hmmm

well glad it was a simple fix.

Whenever I encounter problems I tend to check the fuses first with DMM, replace them next step then redo wiring.

At least it wasnt an expensive ordeal.

MobileAudio219 · Post by **MobileAudio219** » Sat Oct 24, 2009 1:25 pm

X2, good to check the fuses first.

Figured it was a bad ground or power connection.