Electrical HELP!!!

v6'stang · 11-27-2007, 07:24 PM

ok, here's the setup. 2003 v6 5speed. i have OE foglights w/55w bulbs, and 2 sony P5 subs; max pwr 1100w, pushed by a sony 1200w amp, along w/a 1 farad cap. from walmart (cheap-o)

here's the problem. when i'm at an idle my subs won't work. they have power, they have an input. they won't work.

tonight when i was coming home from walmart i was idling down my road in 2nd gear. (idle: lil above 500 rpms) there was no bass coming from them until i revved it up to right around 1000 rpms. when i got home i let it idle, w/my headlights and fog lights on. (they were on when i was driving home too) checked the cap. it said i had 12.44 amps to the amp. when i turn the headlights off the subs would "activate" sound would come from them. OR if i revved up to more then 1000 rpms, they'd kick on.

wtf is wrong w/it? i have a optima yellow top deep cycle battery in the car, so it's not like it's a bad battery. any input would help greatly!!! thx guys!

Kains03GT · 12-01-2007, 10:05 PM

Is everything wired correctly?.. And did you get an amp wiring kit capable of your amps output?

Mixedbreed02GT · 12-01-2007, 10:47 PM

what's the wattage on the amp? i need RMS and Peak power. what class is it.

also, it sounds like your alternator is either bad or going bad. if the alternator isn't putting out enough power to the battery, to provide power for the subs, and all the accessories are running (headlights, radio, fogs, amp, etc) then that could be your problem.

i'd go to the parts store and have your alternator tested with a load on, and with a load off.

load on means with everything on, fogs, wipers, defrost, radio etc.

load off means shut everything off, but start the car.

*venom* · 12-02-2007, 07:08 AM

You mean volts not amps which is really low if the car is on. You should be in the 13s with all accessories on. Your alt could be bad or cant supply enough power and you need an upgrade.

Bwhipple · 12-03-2007, 06:37 AM

This place has some cool looking alternators if yours is bad or you decide to upgrade.

http://www.tuffstuffperformance.com/

11-27-2007, 07:24 PM	#1 (permalink)
v6'stang Senior Member Join Date: Mar 2005 Location: FL Posts: 936	Electrical HELP!!! ok, here's the setup. 2003 v6 5speed. i have OE foglights w/55w bulbs, and 2 sony P5 subs; max pwr 1100w, pushed by a sony 1200w amp, along w/a 1 farad cap. from walmart (cheap-o) here's the problem. when i'm at an idle my subs won't work. they have power, they have an input. they won't work. tonight when i was coming home from walmart i was idling down my road in 2nd gear. (idle: lil above 500 rpms) there was no bass coming from them until i revved it up to right around 1000 rpms. when i got home i let it idle, w/my headlights and fog lights on. (they were on when i was driving home too) checked the cap. it said i had 12.44 amps to the amp. when i turn the headlights off the subs would "activate" sound would come from them. OR if i revved up to more then 1000 rpms, they'd kick on. wtf is wrong w/it? i have a optima yellow top deep cycle battery in the car, so it's not like it's a bad battery. any input would help greatly!!! thx guys! __________________ Mods: 17x9 black cobra wheels, BBK CAI, tru dual flowmasters, sct 4bank elim. chip, motive 3.73's, frpp t-lok. ...and the list grows.

12-02-2007, 07:08 AM	#4 (permalink)
venom Super Moderator Join Date: Sep 2004 Posts: 5,424	You mean volts not amps which is really low if the car is on. You should be in the 13s with all accessories on. Your alt could be bad or cant supply enough power and you need an upgrade. __________________ http://www.mustangboards.com/mustang...500/ppuser/103

12-03-2007, 06:37 AM	#5 (permalink)
Bwhipple Boosted Join Date: Jun 2006 Location: Montoursville, PA Posts: 259	This place has some cool looking alternators if yours is bad or you decide to upgrade. http://www.tuffstuffperformance.com/ __________________ 2003 Silver GT Vert. -------------------------------- D1SC Procharged - 13lbs. 420.23RWHP - 419.69 RWTQ Too many mods...

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12-01-2007, 10:05 PM	#2 (permalink)
Kains03GT Senior Member Join Date: Apr 2007 Location: Dyess A.F.B. Texas Posts: 122	Is everything wired correctly?.. And did you get an amp wiring kit capable of your amps output?

12-01-2007, 10:47 PM	#3 (permalink)
Mixedbreed02GT Banned Join Date: Aug 2007 Posts: 1,153	what's the wattage on the amp? i need RMS and Peak power. what class is it. also, it sounds like your alternator is either bad or going bad. if the alternator isn't putting out enough power to the battery, to provide power for the subs, and all the accessories are running (headlights, radio, fogs, amp, etc) then that could be your problem. i'd go to the parts store and have your alternator tested with a load on, and with a load off. load on means with everything on, fogs, wipers, defrost, radio etc. load off means shut everything off, but start the car.