So, my 1995 Monte has a new alternator. When the last one went, lights on
the dash started going nuts then the check engine light came on. After
replacing the alternator, check engine light stayed on. Cleared and checked
the codes. P1640 and P1650, QDM "A" and QDM "B" faults. Damnit. What I'm
assuming is that the alternator took out some fuses or components with it,
going to go check now.
I noticed when the PCM commands FAN2 to come on, it's not coming on.
One thing after another..........
Side note - Those idiots lights are as dumb as you think. When you turn the
key forward to the "run" position, all the pretty lights light up. However,
if the battery light does not come on, there is a charging system problem.
Sure enough, I checked it out, it's true. Imagine that.