My daughter's 96 Blazer keeps needing jumpstarts. I've checked the battery terminals and cleaned them thoroughly, made sure the battery had enough electrolyte in it, and checked all the wires at the alternator.
With the engine running, I was only getting 12.9 V at the battery, and at the alternator terminal - I would have expected something in the 13-14 V range.
The idler pulley is chirping loudly, so I know that'll need replacing, but can't really tell if there's any noise coming from the alternator itself (without losing an ear to the fan).
Is there something else I should check before possibly investing in a trip to the shop?
Vito