Re: wiper motor wiring
Your best bet would be to purchase an AIM (Assembly Instruction Manual) manual for your car. These manuals are year-specific, cost around $30, and can be found on eBay or various Chevelle vendors. They show wiring diagrams for most components on your car, and other assembly instructions.
First thing I bought after purchasing both my '67 and '68 Chevelles.
When I works, I works hard.
When I sits, I sits loose.
When I thinks, I falls asleep.
The '68 L79 Malibu survivor as found in Nov. 2014, in my profile pic.