Super hairy monkey balls man I got the alternator last friday put it on goin great.... then tonight nail it to get on the freeway bam battery light completely stays on..... I had a 23 mile drive to get home I made it....... took it of spun the pulley it was making metal on metal noises...... so take it back exchange it put new one back on and no light now..... but gotta love lifetime warrenty for 10 min of labor.....