2005 Polaris Sportsman 400/500 Service Manual, Page 294Get this manual
ELECTRICAL
Brake Lamp Switch
Squeeze Tabs Push Thru to Remove
If the rear work lights will not come on, check the following: GCheck for continuity between the switch contacts Place volt meter leads between two contacts with switch in ON position GProbe the worklight plug wires at back of vehicle, there should be at least 12V at the plug