General Steps (May Vary):
1. Locate the Blower Motor Resistor: This is usually located behind the glove box or under the dashboard on the passenger side. It's often a small, black, rectangular unit with wires connected to it. Some models might have it near the blower motor itself under the dashboard. You may need a flashlight and possibly a mirror to locate it.
2. Prepare for Access:
* Glove Box Removal (Most Common): This usually involves removing screws or clips holding the glove box in place. Consult your owner's manual or a repair manual for the correct procedure. Sometimes, you might only need to partially remove it.
* Dashboard Access (Less Common, More Difficult): This can be substantially more challenging and may require removing more interior panels. It's best avoided unless absolutely necessary.
3. Disconnect Electrical Connections: Before touching anything, disconnect the battery's negative terminal to prevent electrical shocks. Once disconnected, carefully unplug the electrical connectors from the blower motor resistor. Take note of their positions for reassembly.
4. Remove the Resistor: Once the connectors are disconnected, you should be able to remove the resistor. It might be held in place by a clip, screws, or simply friction-fit. Again, your repair manual will be crucial here.
5. Install the New Resistor: Install the new resistor, ensuring it's securely seated and the electrical connectors are properly reattached.
6. Reassemble: Put everything back together—glove box, dashboard panels, etc.—in the reverse order of disassembly.
7. Reconnect Battery: Reconnect the battery's negative terminal.
8. Test: Test the blower motor's speed settings to confirm the new resistor is working correctly.
Important Considerations:
* Repair Manual: Obtain a repair manual specific to your 1991 Oldsmobile Silhouette. This will provide precise instructions, diagrams, and torque specifications, significantly reducing the risk of damage. Online resources like Haynes or Chilton often provide these.
* Photography: Take pictures at each step of disassembly. This is invaluable for reassembly.
* Patience: Working under the dashboard can be frustrating. Take your time and be methodical.
* Safety: Always disconnect the battery's negative terminal before working on electrical components. Be careful not to pinch or cut any wires during removal and reinstallation.
If you're uncomfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic. Incorrectly replacing the blower motor resistor could cause further damage.
