Permanent Magnet Motor

On models with pulse wipers, disconnect electrical connectors from pulse module and connect switch and motor harnesses together. If problem is corrected, pulse module is defective.

Fig. 11 Permanent magnet type windshield wiper motor. 1984---87 Caballero & El Camino:

Fig. 20 Wiper switch continuity chart. 1984---87 Caballero & El Camino:

1984---87 CABALLERO & EL CAMINO
Wiper Switch Continuity Test
1. Disconnect electrical connectors from wiper motor, Fig. 11.
2. Check switch continuity using a digital voltmeter. Continuity should exist at various switch positions between terminals shown in Fig. 20 and ground.

Fig. 12 Permanent magnet type windshield wiper motor. 1985---87 Astro Van & Safari:

Fig. 21 Wiper switch continuity chart. 1985---87 Astro Van & Safari:

1985---87 ASTRO VAN & SAFARI
Wiper Switch Continuity Test
1. Disconnect electrical connectors from wiper motor, Fig. 12.
2. Check switch voltage using a digital voltmeter with ignition switch in the ``On'' position. If readings are not as specified at various switch positions between terminals shown in Fig. 21 and ground, replace switch.