1. Preparation:
* Safety First: Disconnect the negative battery terminal to prevent electrical shocks.
* Gather Tools: You'll need various tools, likely including screwdrivers (Phillips and flathead), possibly sockets and wrenches (sizes will vary), possibly pliers, and possibly a trim removal tool. A shop manual will give you the exact tools needed.
* Obtain the Correct Blower Motor: Ensure you have the correct replacement blower motor for your 1991 Ford E350. The part number should be verified against your van's specifications.
* Workspace: Work in a well-lit area with adequate space.
2. Accessing the Blower Motor:
This is the most variable step. Access to the blower motor usually involves removing parts of the dashboard or accessing it from under the dash. The exact procedure depends on your van's configuration:
* Dashboard Removal (Most Likely): This often requires removing the lower dashboard panels, possibly the glove box, and potentially other trim pieces. This is where a trim removal tool is helpful to prevent damage. Be very careful; these clips are often brittle and break easily. Take photos as you disassemble to aid reassembly.
* Accessing from Under the Dash (Less Likely): Some E-Series vans might offer some access to the blower motor from underneath the dashboard, but this is generally less convenient.
3. Removing the Old Blower Motor:
Once you have access, you'll likely need to:
* Disconnect Electrical Connectors: Carefully unplug the electrical connector(s) leading to the blower motor.
* Remove Mounting Screws or Bolts: The blower motor is usually held in place by screws or bolts. Remove these carefully.
* Remove the Blower Motor: Gently remove the old blower motor from its housing. Take note of its orientation and any components connected to it.
4. Installing the New Blower Motor:
* Inspect the Housing: Check the blower motor housing for any damage or debris.
* Install the New Motor: Carefully install the new blower motor, ensuring it's properly seated and oriented.
* Secure the Blower Motor: Replace the mounting screws or bolts to secure the new motor in place.
* Reconnect Electrical Connectors: Carefully reconnect the electrical connectors to the new blower motor.
5. Reassembly:
* Reinstall Trim and Panels: Carefully reinstall all the dashboard panels and trim pieces you removed, working in reverse order of disassembly.
* Test the Blower Motor: Reconnect the battery's negative terminal and test the blower motor using the controls on the dashboard. Check all speeds.
Important Considerations:
* Consult a Repair Manual: A repair manual specific to your 1991 Ford E350 is crucial. It will provide precise instructions, diagrams, and torque specifications. This is not something you should attempt without one.
* Take Pictures: Take photos during disassembly to help you remember how everything goes back together.
* Patience: This is a time-consuming project that requires patience and attention to detail.
* Professional Help: If you're not comfortable working on your vehicle, it's always best to seek professional help from a qualified mechanic.
This is a general guide. The specific steps might vary slightly depending on your van's model and trim level. Always refer to a repair manual for detailed and accurate instructions. Improper installation can lead to damage to your van or even injury.
