On the Turn Signal Stalk the wire is for the Cruise Control. There will be a receiving Female wiring plug up under the dash area that is designed to accept the male skinny four wire plug.
The Stalk will go into the Wiper Switch has the approximately 7 Wires... from the wiper switch going into the relay module out of the relay module I cant remember there are going the wiper motor. The BROWN wire controls the interment relay module.
If you are in this deep , I would replace the turn signal wiring as well .
All three wiring leads will need to route through the column together and if you still have the plastic sleeve this will need to be used to keep the wires from being crimped or damaged.
There is a picture above that shows the intermittent relay. New ones are available as I purchased one from Work Horse Parts
Part# 15598496 Applications: All Workhorse P-Series & W42/62 Commerical Chassis
www.workhorseparts.com
They work well as I just replaced mine.