General Steps (Proceed with Caution):
1. Disconnect the Battery: This is the most important step. Disconnect the negative (-) battery terminal first to prevent short circuits.
2. Steering Column Removal (Partial or Full): This is likely necessary, at least partially. This involves removing the steering wheel cover (usually just clips and screws), the turn signal/wiper stalk, and potentially parts of the steering column itself. This varies greatly depending on your truck's configuration. The repair manual will be essential here. Some steps might involve:
* Removing screws and fasteners holding the steering column shrouds in place.
* Disconnecting electrical connectors.
* Potentially using a steering wheel puller (requires specific tools and knowledge).
3. Wiper Switch Removal: Once you've accessed the switch, there will be retaining clips, screws, or a combination of both holding it in place. Carefully remove these, noting their positions for reassembly.
4. Wiring Harness: The wiper switch will have a wiring harness connected to it. Carefully disconnect the connectors. Take photos or make a diagram of the wiring connections before disconnecting to help with reassembly. Some connectors may have locking tabs that need to be depressed before they will separate.
5. Installation of New Switch: Install the new wiper switch, ensuring all connections are secure and the switch is properly seated. Reverse the removal steps.
6. Reassembly: Carefully reassemble the steering column components, ensuring all screws and fasteners are properly tightened.
7. Reconnect the Battery: Reconnect the battery's positive (+) terminal.
8. Test the Wiper Switch: Test the new wiper switch to make sure all functions (low speed, high speed, wash, intermittent) are working correctly.
Important Considerations:
* Repair Manual: As emphasized, a repair manual specific to your '86 Chevy Silverado is absolutely necessary. Generic instructions can be misleading and potentially cause damage.
* Tools: You'll need a variety of tools, likely including screwdrivers (Phillips and flathead), possibly sockets and wrenches, and potentially a steering wheel puller.
* Electrical Safety: Be mindful of electrical connections. Avoid touching exposed metal parts or wires while working on the system.
* Patience: This is a potentially involved repair that requires patience and attention to detail.
If you're not comfortable working on your vehicle's electrical system or steering column, it's best to take it to a qualified mechanic. Attempting this repair without proper knowledge and tools can lead to damage and potentially dangerous situations.
