I think I have determined it is the alternator or k40 relay. The reason I say k40 is because when it's really hot out a bunch of items from bas to ASR to ignition to blower act up really strangly. Thr BAS/ASR clears up and the lights work after I drive the car for over about 20 min and the battery is reading 13.2 at the scangauge off the obd2 port. The battery terminals read 13.8-14.0 when running. The obd2 reads low when I first start up, like 12.2v. in reality the actual voltage at the battery is about12.8-13.0. why does the ECU read .6 volts lower? (The climate control unit reads no higher that 12.3 ever, as low as 11) Also my blower motor is surging and never seems to get to full power, sounds like my blower resistor is in store.

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1999 E300D OM606, 278,000 km (Daily)
1984 Camry Turbo-D, 319,000 mi (Sold)
1992 300D OM602, ~450,000 mi (Sold, Blown Head)
1999 F250 7.3 Powerstroke, 243,000 mi (Sold)
1996 VW Passat TDI 110,000 mi (Sold) "The first Diesel"