Always check ALL the fuse that supply power to the BC1. ... the heated rear windowand optional heated front screen until the voltage level exceeds 12.2 ... Convenience Opening and Closing of windows and sunroof ..... intermittent wipe, slow, and fastspeeds. .... Road speed has no influence over wiper speed 1 (Slow).
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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.
First check the fuse box under the hood for a blown or poorly connected fuse. Next, find the wires going to the wiper switch and check for power when you turn the switch on. Finally, if there is power everywhere you checked, go directly to the motor and check it for getting power. Also check the ground wires for this device. If no ground...no action!
the driver side is the main source of power 4 the windows. you will need 2 replace the electrical board on the door for the windows. try running a wire from the battery to the fan on the positive. if the fan comes on check the relay. if not bad fan
There are three things involved in wiper operation, switch, the delay circuit board and the motor. If you select winshield wash do the wipers operate normaly? if this is the case then the motor works and delay is operating < not a guaranty on delay but it does say the circuit is operating.If wash cycle does not work then circuit not working< could still be switch causing this> if you know someone or you yourself can remove switch it needs to be ohmed to know that it is operating and if it is then voltage during operation in all settings needs checked at wiper motor.If no voltage found in inoperable settings then delay is not working.While investigating problems like this always inspect wiring as you check from point to point because could be damaged wires as well.
the pump wire is probably not making good connection with the pump that is why the washer fluid wont work try and clean the connection. the pump is located under the fill tank
check for a bad relay for the wipers not working. the relay will be under the hood or under the dash next to the fuses. the cover will tell you what piece is the relay. the relay controls the delay in the wipers so that is probably bad and you can get them at napa for cheap. and simple to install its just like a fuse.