1985 Chevy Van wiper delay module

Like one of your past queations from another customer, I can not find the wiper delay module and I also have repaced the wiper motor and the switch on the collum and it still does not work. Please don't tell me to get a manual I have 5 manuals now and none of them say anything about where the delay module is located and the wiring diagrams just show the motor insert on the dia. But no real information, I have been to dealers and I get the message from their shops the vehicle is to old and they don't have the information and to go on line.