Here's a general outline of the process. Remember, this is not a substitute for a proper repair manual:
1. Preparation:
* Safety First: Disconnect the negative battery terminal to prevent electrical shocks.
* Gather Tools: You'll likely need a socket set, wrenches (possibly metric and standard), screwdrivers (Phillips and flathead), pliers, and possibly a ratchet. Consult your repair manual for specific tools.
* Parking & Safety: Park your Blazer on a level surface, engage the parking brake, and chock the wheels.
2. Accessing the Wiper Motor:
* Underhood Access: Most Blazer wiper motors are located under the hood, typically near the base of the windshield. You may need to remove some plastic covers or other components to gain access. Your repair manual will show you exactly where it is and what needs to be removed.
* Identifying Components: Locate the wiper motor itself, the linkage connecting it to the wiper arms, and the electrical connector.
3. Disconnecting the Wiper Motor:
* Electrical Connector: Carefully disconnect the electrical connector from the wiper motor. Take a picture before disconnecting it to help with reassembly.
* Wiper Linkage: Disconnect the linkage connecting the motor to the wiper arms. This usually involves removing some clips or bolts. Again, your repair manual is vital here.
* Mounting Bolts/Nuts: Carefully remove the bolts or nuts holding the wiper motor in place. Be mindful of where these bolts/nuts go for reassembly.
4. Removing the Old Wiper Motor:
* Careful Extraction: Gently remove the old wiper motor, being careful not to damage any surrounding components.
5. Installing the New Wiper Motor:
* Positioning: Carefully position the new wiper motor in its place, ensuring it aligns correctly with the mounting holes.
* Securing: Secure the new wiper motor using the bolts or nuts you removed earlier. Tighten them to the specifications in your repair manual.
* Reconnect Linkage: Reconnect the wiper linkage to the new motor.
* Reconnect Electrical Connector: Reconnect the electrical connector to the new motor.
6. Testing:
* Reconnect Battery: Reconnect the negative battery terminal.
* Test Wiper Function: Turn on your wipers to ensure they are functioning correctly. Check for proper speed and operation in all positions (intermittent, low, high).
Important Considerations:
* Repair Manual: Again, a repair manual specific to your Blazer's year and model is essential. This will provide detailed instructions, diagrams, and torque specifications crucial for success.
* Professional Help: If you're not comfortable with auto repair, it's best to take your Blazer to a qualified mechanic. Improperly installing the wiper motor can lead to further damage.
This is a general overview. Specific steps and tools will vary considerably depending on your Blazer's year and model. Always refer to your vehicle's repair manual for precise instructions and safety precautions.
