How many volts do you need to flip the switch on a fuel pump?
This must be over 10 volts to flip the switch in the relay. This will confirm whether or not the ECM is telling the fuel pump to run. 2. Check for continuity from the tan/white wire at the relay to the fuel pump. This will determine if power can get from the relay to the fuel pump.
Can You Hot Wire a fuel pump through a G Terminal?
Yes I changed the fuel pump relay and checked the fuse. Neither appeared to be bad and the old relay clicked and worked if I jumped the G terminal. My question is can I hot wire the fuel pump through the G terminal using a toggle switch and not cause any damage to anything?
How does the fuel pump bypass the relay?
If there is voltage there, then we are actually dealing with two issues. There is a secondary path for fuel pump power that bypasses the relay. It runs through the oil pressure switch…as long as you have oil pressure, there should be power to the fuel pump through the secondary circuit.
How to check for continuity from the relay to the fuel pump?
Check for continuity from the tan/white wire at the relay to the fuel pump. This will determine if power can get from the relay to the fuel pump. To make this easier, this test can also be done between the relay and the pin on the ALDL since we know power gets from the ALDL to the fuel pump when you jump it. 3.
This must be over 10 volts to flip the switch in the relay. This will confirm whether or not the ECM is telling the fuel pump to run. 2. Check for continuity from the tan/white wire at the relay to the fuel pump. This will determine if power can get from the relay to the fuel pump.
Yes I changed the fuel pump relay and checked the fuse. Neither appeared to be bad and the old relay clicked and worked if I jumped the G terminal. My question is can I hot wire the fuel pump through the G terminal using a toggle switch and not cause any damage to anything?
If there is voltage there, then we are actually dealing with two issues. There is a secondary path for fuel pump power that bypasses the relay. It runs through the oil pressure switch…as long as you have oil pressure, there should be power to the fuel pump through the secondary circuit.
Check for continuity from the tan/white wire at the relay to the fuel pump. This will determine if power can get from the relay to the fuel pump. To make this easier, this test can also be done between the relay and the pin on the ALDL since we know power gets from the ALDL to the fuel pump when you jump it. 3.