Tailgate Window Safety Switch

Using a 12-volt test light, connect one end of test light to ground and probe Brown wire of safety switch. Turn tailgate switch to "UP" position. If test light glows, voltage is present at switch. If test light does not glow, check feed circuit and repair as necessary.
Probe Brown wire. Turn tailgate switch to "UP" position and close safety switch. If test light does not glow, replace switch. If test light glows, check tailgate window motor.