The Ford Escort, like many Ford cars and light trucks, comes equipped with a fuel-pump shut off. This fuel-pump shut off, called an inertia switch, prevents fuel from being pumped to the engine in the event of an accident like a rear end collision or rollover. A defective inertia switch will cause the fuel pump to shut off and the engine to not start.
This switch activates when a metal ball that is magnetically held against two contacts is knocked loose by the impact. Reset the switch by pushing the reset button located in the trunk or under the right side of the dash.
Power to the circuit is supplied to the switch by the fuel pump relay when the relay is energized by the on-board computer. The ground circuit is through the switch first, then through the fuel pump.
Testing the Switch
To test the switch and determine if it's a bad switch and not a bad fuel pump, push the reset button. These switches can be tripped by a sharp blow to the trunk lid---sometimes all that is needed is a reset
If the vehicle still fails to start, unplug the wiring connector at the switch and test for power on one side of the connector and ground on the other side. This is the normal state of the circuit. Power comes from the fuel-pump relay, and ground is found through the fuel pump. If there is no power, but there is ground, the fuel pump relay or fuel pump fuse could be the defective part. No ground indicates a wiring problem to the fuel pump or a defective fuel pump.
If you have power and ground, install a jumper wire to bypass the switch. If the engine will start and run normally, then the switch can be called defective.
If the engine still does not start, check for power at the fuel pump. If there is power and ground at the fuel pump, then the fuel pump can be called defective.
Common Problems of Ford Escorts
Diagnosing problems on small vehicles such as the Ford Escort can be difficult due to limited space and the complexity of modern...
Ford Fuel Pump Problems
Ford Fuel Pump Problems. Dealing with the fuel pump issues in your Ford vehicle can be stressful. ... How to Change a...
How to Reset the Ford Fuel Shutoff
Your 1989 Ford Ranger is equipped with a fuel cutoff switch for your protection. ... Troubleshooting Ford Escort Fuel Cut-Off Problems. The...
How to Reset a Fuel Pump Shut Off Switch
How to Reset a Fuel Pump Shut Off Switch. Many vehicles available today come with fuel pump shut-off switches. ... Troubleshooting Ford...
How to Reset Fuel Switch on a 2002 Ford F150
How to Reset Fuel Switch on a 2002 Ford F150. ... The fuel pump cut-off switch also has the potential to disengage...
How to Repair a Fuel Pump Relay
The fuel pump on a Ford Escort uses a relay to supply it with electrical power. ... How to Reset a Fuel...
Trouble Codes for the 1994 Ford Escort LX
eHow; Car Repair & Maintenance; Emissions Controls Repair & Maintenance; Read Trouble Codes; Trouble Codes for the 1994 Ford Escort LX
How to Reset a Fuel Inertia Switch
Vehicle owners and mechanics use this switch to cut off fuel to the fuel system as a safety measure during car ......
How to Troubleshoot & Repair a Ford Escort ZX2
The repair of your 1997 Ford Escort's horn requires you to replace the old horn with a ... The two-door 1999 Ford...
How to Reset the Switch for a 1999 Ford F-150
How to Reset the Switch for a 1999 Ford F-150. ... the fuel pump shut-off switch ... How to Reset a Fuel...
Ford Faulty Fuel Pressure Regulator Symptoms
The fuel system on your 1993 Ford Thunderbird ... Signs of a Bad Fuel ... A fuel pressure regulator is an automotive...
How to Locate the Fuel Pump Relay in a Powerstroke
The relay's internal circuitry closes, completing the electrical circuit, ... The fuel pump on a Ford Escort uses a relay to supply...