You can check alternator output by measuring the voltage across the battery with the engine running. You should be getting 13.8-14.4 volts, preferably 14.something. Get your battery tested at Autozone or somewhere.....they can test it under load and tell you if you need to replace it.
'99 Sport TropicGreen,Duratec, SVT exhaust, Brembo rotors, Ceramic pads, K&N filters(oil & air), Alpine CDM7874, Polk DB570 speakers front and rear. Fog light mod. 50% Formula One tint.
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