2-Speed System Tests
If wipers will not work in any switch position, turn switch to low speed and listen to the motor. If motor is running, check output shaft. If shaft is not turning, replace gearbox. If it is turning, check linkage connections. Replace any worn or damaged parts. If motor is not running, use a voltmeter or test lamp and check for 12 volts between motor terminal "L" and ground.
- If voltage is present and panel switch circuit breaker is not cycling, check for an open circuit at the following locations. On Dart, Valiant, Aspen and Volare, insure ground strap connections are good. On all other models, connect a jumper between terminal P2 and ground. If motor runs, panel switch is faulty or wiring to switch is open. Problem may also be poor contact of common brush to commutator, or an open circuit in armature.
- If test lamp lights or 12 volts is present only part of the time, the circuit breaker is cycling. Problem may be a faulty circuit breaker or a short in the wiring, motor, or switch panel. Check these conditions with an ammeter and with wiper arms and blades removed. Disconnect harness connector at motor and connect ammeter between battery and terminal "L". Also on all models except Dart, Valiant, Aspen, and Volare, connect a jumper wire between terminal P2 and ground. If motor runs with average ammeter reading below six amperes, motor is good and trouble is in switch panel or wiring. If motor does not run and draw is more than six amperes, check wiper linkage for binding. Disconnect drive link from motor. If motor runs and draws less than three amperes, repair linkage. If motor fails to run or draws more than three amperes, check motor and gearbox for internal jamming. If no internal jamming exists, check motor for brush leads shorting to housing or armature for burned or blackened windings which could indicate an internal short.
- If after several minutes test light or voltage do not appear at terminal "L", and circuit breaker is not cycling, disconnect harness and connect jumper from battery to terminal "L". On all models except Dart, Valiant, Aspen, and Volare, also connect a jumper between P2 and ground. If motor now runs, wiring or switch panel are faulty.