Nissan 28810-9Z400 Windshield Wiper Motor Assembly

Verify voltage at a terminal using a grounded 12-volt test light by applying the probe to each terminal at a connector. To check wiper speed inspect the battery condition and charge level; slow wiper motion requires inspection and cleaning of binding linkage and pivots then lubrication before reinstalling the motor if the battery has adequate power. The wipers will need a new motor when all connections are fine but slow operation continues and no loose or corroded wires are detected around the ground connection. The procedure includes inspecting the wiper motor's fuse while testing with a jumper wire to the ground if the fuse passes inspection. Successful operation requires repair of the ground connection at that time. A missing voltage signal at the motor can be detected when the wiper switch is activated while removing the cowl cover when needed. The motor needs replacement when voltage exists at the connector after removing it from the vehicle by testing with fused jumper wires from the battery along with linkage binding verification for functionality. To diagnose the issue the wiper motor needs replacement when it fails to operate but a wiper amplifier inspection should follow after discovering no voltage source through the switch examination. The analysis of inoperative interval function starts with checking the switch-to-wiper amplifier wire continuity followed by resistance testing on the multi-function switch delay control knob. Check the connector-side motor ground for less than 5 ohms resistance after inspecting whether the wipers stop at their switch-off position. Extract the wiring from the wiper control switch to check whether the wipers stop. A new wiper control switch is needed if the wipers persist running despite switching the ignition off. Otherwise, a defective motor limit switch must be replaced. Check for wire disconnect between the control switch and motor for electrical continuity and replace the wiper motor only when the wiring is found faultless. The procedure to replace the wiper motor involves disconnecting the cable from the battery negative terminal then removing the right wiper arm, removing the cowl cover with the wiper linkage plate before detaching the wiper linkage from the motor crank arm followed by unplugging the electrical connector removing retaining bolts and pulling out the motor. Installation follows the exact opposite steps. The wiper amplifier replacement procedure begins with finding the wiper amplifier on the wiper motor then unplug the electrical connector before removing the fastener and separating the amplifier before reinstalling it the correct way around.

Inspect wiring continuity between the switch and wiper amplifier, and check the resistance of the delay control knob.