Review on 🔌 Dorman 906-109 Wiper Pulse Board, Black: Optimized Searchable Title by Jason Guzman

85 Fiero GT Phantom Wipers with the ignition on. I also replaced the wiper switch with 87-88 (click stops). Further troubleshooting with only pwr and grd for the module turns on relay R1. No switching input, no low input, no outputs R1 must not be activated. Defective electrical capacitors are suspected. I don't know how long it's been on the shelf. Or how it was stored. This allowed them to dry out. I will also change the caps on this board and see if that helps. There is also no date of manufacture on the module. Physically, it looks like it has lighter components. R1 definitely refers to a newer module type. I would like Dorman to include a schematic with the module. It would be much easier to troubleshoot if the old analog circuit fails when it should be new.