Originally Posted by JMJNet
Load test the battery first before condemning the alternator.
Load test is NOT voltage test, it measures the amp-acity of the battery.
Once you are sure that the battery is good, then load test the alternator to see if alternator is bad.
Also make sure the low voltage is not caused by bad cables and terminals.
Thanks everyone. JMJNet, we swapped in another known good battery to eliminate that possibility. We still could not get a good volt reading at the battery or at the alternator. Checked cables and connections.
My co-worker had Advanced Auto order one in from the regional warehouse. Did NOT check the unit at the store (Big No, NO). Got back and discovered a mounting casting completely broken off. GRRRRRRRRRR, LOL, a typical Monday! Another replacement due Tuesday a.m.. Everyone else had them in stock, but already paid for AND core unit turned in and sent back.
He's going cheapest local possible because truck will be sold in a few weeks. Goodness, even tortoise speed me could remove this alternator in 15 minutes.
A scan tool check showed no DTC's. Is this normal???