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WPR fuse 25amp under hood fuse box .
Wiper/Washer System Components
The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Body control module (BCM)
• Wiper PCB relay
• Wiper high PCB relay
• Windshield wiper motor
• Windshield washer fluid pump
• Windshield washer fluid level switch
• WPR fuse 25 A
• WSW fuse 10 A
This is more then likely not a fuse issue !!!!!!!
Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
Wiper motor low speed operation and the wiper PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
The PCB relays mentioned above are soldered right into the circuit board inside the fuse/relay block under the hood . There are alot of reasons for the wipers not to work ! The fuse could be blown but fuse's don't just blow for no good reason , short to ground , low resistance high current flow etc.... Intermittant !
Power and Grounds
With the ignition in the ON position, accessory voltage is supplied through the 25A WPR fuse to the WIPER PCB relay, the WIPER HIGH PCB relay and the WS WASH PCB relay that are all located in the underhood fuse block. Refer to Wiper/Washer Schematics.
G200 provides ground for the windshield wiper motor and the WIPER PCB relay. G100 provides ground for the windshield washer fluid pump and the windshield washer fluid level switch.
The wiper motor could be bad...the only wat to know is to check for voltage at the wiper motor. If the fuse is good and you have 12VDC to the motor...then the motor is bad. If you don't see voltage at the motor, I would suspect a bad wiper motor switch.
Lets deal with the fan. Only two things can cause a fuse to pop. A short in the wiper motor. Unplug the connector on it. It the fuse does not blow now you need a wiper moter. If it still blows the positve wire going to the motor is touching medal somewhere. You will need to inspect the wire going from the fuse block to the wiper motor. . Also sounds like you have no power to the brake switch.. Another fuse issue or a broken wire somwhere before where you bypassed the switch
Same thing happened to my '87 Chevy S-10 pickup, so it's probably the same part. The wiper motor froze, and because it's direct geared to the wipers, they don't move unless it does.
Remove the wiper motor, reposition the wipers to their resting position, then reinstall a new wiper motor.
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