Wiper Inoperative

Connect a battery and ammeter to No. 2 terminal and jumper wire from No. 1 terminal to ground. If current draw is 0 amperes, check solder connection at terminal board or disassemble motor and check all splice connections. If current draw is 1-1.5 amperes, disassemble motor and check for open armature, sticking brushes, improperly positioned brush springs or faulty brush pigtail connections at splice joints. If current draw is 10-12 amperes, check for open shunt field circuit or broken gear.