voltage drop

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sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: November 03, 2008 at 10:11 PM / IP Logged

I got a voltage drop when at high volume in my cavalier 98... I got 8 Gague wire for the amp.. (Pioneer GM-7300T) but i dont know if the problem is the alternator or the wire.. because i have changed my wire - Added one Battery to engine. (Before was Engine to chassis) Battery to chassi and alternator wire are OEM. The positive battery cable is a 8 gauge and ground to chassi 8 gauge too... What i really need to do ?

ragsports

Copper - Posts: 192

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Joined: March 17, 2008

Location: Michigan, United States

Posted: November 03, 2008 at 10:29 PM / IP Logged

Is the pioneer the only amp you are running? chances are you are exceeding your the capibilities of you electrical system. We need more information before we can tell you exactly what to do, but chances are you will need to upgrade your alternator, adding another battery does nuthing if you cant replace the power being drawn.. Is the current alternator a stock alt? Also what fusesd are in the amp, i cant seem to find any specifications on model stated there is a ssimilar model GM-7300M, let me know..

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: November 04, 2008 at 12:41 AM / IP Logged

Sorry, i am running GM-D7400M Class D ( http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/Amplifiers/GMSeries/GM-D7400M) My alternator its stock. There is 2x 25A Fuse on the amp. I got a 1.0 Farad Cap too..

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: November 04, 2008 at 12:43 AM / IP Logged

Its the only amp running in the car. Its wired to a Clarion SRW1051 subwoofer in 4 Ohms in a ported box.

i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 04, 2008 at 2:11 AM / IP Logged

Is there a voltage drop to the amp, or is there a voltage drop at your headlights when the bass is hitting?

Upgrade the battery to chassis wire.

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: November 05, 2008 at 1:15 AM / IP Logged

Well here the update... i have changed the ground wire from battery to chassis ... now its a gauge 4.. Its better than before .. example my headlight doesnt flash now but when i turn the heater and more accessories there still voltage drop.. the voltage drop evrywhere in the car.

ragsports

Copper - Posts: 192

Joined: March 17, 2008

Location: Michigan, United States

Posted: November 05, 2008 at 8:16 PM / IP Logged

you are getting a bigger voltage drop when all the accessories in the car are running because they to draw alot of power. If you want to completly stop voltage drop you need to upgrade your big 3 as well as upgrade your alternator...

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 05, 2008 at 8:33 PM / IP Logged

Were you having these problems before you upgraded the wiring?

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: November 05, 2008 at 11:28 PM / IP Logged

Well the only wire that have not been changed is the alternator positive to battery positive and its the hardest one because its hided and wired to a fuse block . And the voltage drop its on the battery and on the amp. Example a big boom at high volume can drop voltage to 9 Volt in 1 second (While the car is running).

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 06, 2008 at 1:15 AM / IP Logged

i am an idiot wrote:

Were you having these problems before you upgraded the wiring?

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