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Old 11-17-2012, 08:09 PM   #1
subwrx23
Scooby Newbie
 
Member#: 102896
Join Date: Dec 2005
Vehicle:
2004 WRX (Sold)
2010 S4

Default Alternator, Brake + Battery Light?, High Output? Help?

So recently I have been getting a brake light and battery light. My assumptions is my alternators is dying, even though Autozone said it checked out. I have recently added the Big 3, and tried a diode alternator mod. Seems better, but still dips in voltage, thus the lights. Also assuming, my sound system, hids, and other minor accessories are drawing too much.

So I am down to getting a new alternator with a higher output. I have found a 2011 WRX alternator, and I am not sure if it is 110 amps or not. Or if it will fit my 04 wrx. Anyone know? I have been searching on the forums all day.

Anyone try Maniac 140 amp alternators?

Thanks!
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Old 11-18-2012, 10:40 PM   #2
ProdriveDreams
Scooby Specialist
 
Member#: 146819
Join Date: Apr 2007
Chapter/Region: NESIC
Location: Boston / Ipswich, MA
Vehicle:
'02 WRB VF-39'd WRX
W/06 STi Drivetrain swap

Default

make sure the big fat wire going from the alternator to the battery has all its shielding intact, and that the connections aren't corroded. This can cause excessive alternator load, and still poor battery charging.

Do a voltage drop test from the battery positive terminal to the alternator post, and from alternator case to battery negative terminal.

HID's draw less amperage than halogens once running, and how powerful is your amp?
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Old 12-05-2012, 07:35 PM   #3
SRT6
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Member#: 301685
Join Date: Nov 2011
Location: Edmonds, WA
Vehicle:
05 Wrx sedan

Default

Maniac motors make good alternators and build to what you want
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