What is the 1987 Chevy Truck Fuel Tank Switch Wiring Diagram and How Does it Work?
The 1987 Chevy Truck Fuel Tank Switch Wiring Diagram is a visual representation of the electrical pathways that allow your truck to select which fuel tank to draw fuel from. Most trucks from this era equipped with dual fuel tanks utilize a dash-mounted switch that directs power to the appropriate fuel pump. This system is designed to offer extended range and flexibility, especially for work trucks or those undertaking long journeys. The diagram details the connections between the fuel tank selector switch, the fuel pumps located in each tank, the fuel lines, and the vehicle's electrical system. Understanding these connections is key to diagnosing problems. For instance, if one tank isn't supplying fuel, the diagram can help pinpoint whether the issue lies with the switch itself, the wiring leading to that tank's pump, or the pump motor. The proper interpretation of the 1987 Chevy Truck Fuel Tank Switch Wiring Diagram is of utmost importance for accurate troubleshooting and repair. Here's a breakdown of the typical components you'll find represented in the diagram:- Fuel Tank Selector Switch This is the physical control on your dashboard.
- Fuel Pumps One for each tank, responsible for drawing fuel.
- Wiring Harnesses The electrical conduits connecting all components.
- Fuses and Relays For circuit protection and power control.
- The driver operates the selector switch.
- The switch sends an electrical signal to the relay controlling the fuel pump for the selected tank.
- The relay then supplies power from the vehicle's battery to that specific fuel pump.
- The activated fuel pump draws fuel from its respective tank and sends it to the engine.