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There are two relay's in the under hood fuse / relay box . Wiper relay an wiper relay 2 . Maybe one is bad . also check fuse #14 25 amp. Wiper fuse.Plus the BCM - body control module has a hand in making the wipers work . Are you familiar with automotive electronic control modules ?
The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Body control module (BCM)
• Wiper micro relay
• Wiper 2 relay
• Wiper diode
• Windshield wiper motor
• Windshield washer pump
• Windshield washer nozzles
• Windshield washer solvent container
• Windshield wiper arm and blade assemblies
• Windshield wiper transmission
• WIP/WASH 10A fuse
• WIPER 25A fuse
Wiper/Washer System Description
The body control module (BCM) controls wiper motor low speed operation. The washer pump and high speed operation are controlled directly by the wiper/washer switch. The windshield wiper/washer switch supplies voltage on the signal circuits to the BCM for windshield wiper/washer operation. When WASH, MIST, DELAY, LOW, or HIGH is detected, the BCM energizes the wiper micro relay by suppling voltage to the relay coil. This allows battery voltage from the WIPER fuse to flow through the relay switched input then through the contacts and out the relay switched output to the wiper 2 relay switch contacts. Since the wiper 2 relay switch contacts are normally closed to the low speed circuit of the windshield wiper motor, the motor will operate at low speed.
The 1998 Dodge Grand Caravan takes 28" wiper blades on both sides front and a
18" rear wiper. See related links below for more information.
Since there are over 22 different wiper arm attachments, do not buy wipers just
by length only - be sure to lookup exact wiper blade part numbers by vehicle
make, model and year for the brand wiper you decide to purchase. This ensures
correct length AND correct attachment.
If the wipers were buried under snow/ice or frozen to the windshield, you may have blown the red 10 amp fuse located in cavity 9 in the fuse block located on the bottom left side of the instrument panel near the parking brake pedal. In order of easiest to check: 1) ensure wipers not frozen to windshield. 2) ensure wiper arms are not loose on the pivot stud, 3) check the red 10 amp fuse. You stated that "you can hear the motor". Which motor do you hear? The engine or the wiper motor? If you hear the wiper motor, then the fuse is alright. Try 1) and 2) above. PT Stanley