Are their any DIY threads on Checking the low/high voltage "can" wires. Is this something that requires a code reader or can it be done with a multimeter?

__________________
1982 240D - just drug home
1999 E320 Wagon 155,000 - Sold
1983 300TD Gold 285,000 - great car miss her
2004 VW Jetta Wagon TDI - our first diesel love, missed
1955 CJ5 with a 350 chevy