Before You Begin:
* Disconnect the negative battery terminal. This is crucial for safety to prevent accidental shorts.
* Gather your tools. You'll need various screwdrivers (Phillips and flathead), possibly sockets and wrenches (sizes will vary), a small pry bar or trim removal tool, and possibly a flashlight.
* Acquire the replacement blower motor. Ensure you get the correct part number for your specific truck.
General Steps (Consult your repair manual for precise details):
1. Access the Blower Motor: This is usually accessed from under the dashboard on the passenger side. The specific location and method of access will vary slightly depending on the trim level and options of your truck. You'll likely need to remove some trim pieces (glove box, possibly parts of the dashboard) to gain access. Your repair manual will guide you through this crucial step.
2. Disconnect Electrical Connections: Once you've accessed the blower motor housing, carefully disconnect the electrical connector(s) going to the blower motor. Take pictures or make notes to ensure you reconnect them correctly.
3. Remove the Blower Motor: The blower motor is typically held in place by screws or clips. These will be either on the housing itself, or sometimes require removal of the blower motor housing. Again, your repair manual is essential here. This step may involve maneuvering the motor through tight spaces.
4. Install the New Blower Motor: Carefully install the new blower motor, ensuring it's seated correctly and all clips or screws are tightened to the manufacturer's specifications (found in your repair manual).
5. Reconnect Electrical Connections: Reconnect the electrical connectors, making sure they're securely fastened.
6. Reassemble: Reinstall all the trim pieces you removed earlier, ensuring everything is properly aligned.
7. Reconnect the Battery: Reconnect the negative battery terminal.
8. Test the Blower Motor: Turn on your vehicle's HVAC system and check all blower speeds.
Important Considerations:
* Cabin Air Filter: Often, you'll need to remove or at least partially access the cabin air filter to get to the blower motor. Replace the cabin air filter while you're in there; it's a good preventative maintenance step.
* Potential Complications: There may be additional components (like ducting or resistor packs) that need to be carefully addressed during the process. Your repair manual will show you how these components relate to the blower motor.
* Safety First: Always disconnect the battery before starting any electrical work. Work in a well-lit area and be careful not to damage any wires or other components.
Again, using a repair manual specific to your 1999 Dodge Ram 1500 is crucial. The steps above are only a generalized overview. Improper installation can lead to damage or injury. If you're not comfortable with this repair, take your truck to a qualified mechanic.
