1985 Chevy Celebrity 72,000 V6 2.8 FI

I would double check the wiring ensuring that you have no exposed wiring and that everything in connected corrrectly and all connections are tight and not just twisted together and held together with electrical tape. If all the connections are tight then remove the alternator and take it to the parts store to have it tested. I work part time at a parts store and I have pulled alternators and starters off the shelf and it they were bad. If you want to re-clock your alternator simply remove the 4 long bolts that hold the case together and slowly separate the case slightly(just enough to allow you to rotate the back half of the alternator to put the plug at the desired position. Don't worry if you accidlently pulll it apart, the brushed sometimes will pop out and if that happens just go ahead and pull the alternator apart. Get a tooth pick, put the two springs in the brush holder and push the brushed back into their mounting holes and the fromt the back of the alternator put the tooth pcik through the small hole in the back that lines up with the brushes mounting. Just push the tooth pick in far enough to hold the brushed in place while you reassemble the case. Once the case is back together and the bolts have been reinstalled simply pull the tooth pick out and you now have a 6 oclock position alternator vice the 3 oclocl k positon( that is the only difference between your old alternator and the new one).

Hope this helps,

Gary