how and where do you lube the bushings? is this the same as brushes? how does the voltage reg play into this? my volts drop to 13.08 when a/c blower is on high and 13.7 on low, volts are 14.08 with a/c off. are my brushes wearing? voltage reg needed?

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification