I will happy to walk you through installing the Upgraded Circuit Protected Taillight Converter Hardwire Kit, # 119178KIT, on your 2002 Mercury Villager.
First, you will need access to the wiring behind both taillights. This may require removing some panels in the rear cargo area and screws on the taillight housings. Once you have access to the taillight wiring, you will use the included circuit tester to find the right wires to connect to the harness.
The first thing you will want to... view full answer...
The Timbren Heavy-Duty Rear Suspension Enhancement System, part # TFVR001, that you have referenced, is the correct part for your 2000 Mercury Villager. It is designed to attach to the vehicles frame above the rear axle. It will replace the factory bump stop on your vehicle.
The Timbren air spring will sit slightly above or slightly touching the rear axle. When your vehicle is not loaded your factory suspension will work as it normally does. When a load is put on the rear of the Villager... view full answer...