So after driving my car couple times in the day, my last trip i made a 15min stop, turned car off, left my blinkers on. When i went to start it up it was dead. Guages are dim and only reading 9volts and acting like its dead. So i try quick jump, does nothing, guages still dim, acts like out of power, but windows work ok and lights seem to be bright. So checked battery with voltmeter while car in "on" position, 12.1volts while guage is still only ready around 9volts. I cant figure this thing out hopefully someone can help?

Thanks

 

Sounds like corroded terminals or wires at the battery, or a bad starter. In any case, its not a topic for "Advanced Tech", so let's move it to General 67-02 F-Body Tech.