If you need to replace a fuse, make sure you use one with a proper amp rating, never installing one with more amps than necessary. [1] X Research source If you find a blown fuse, that might be a sign that you’ve got a high amp draw and you need to check the individual circuits. [2] X Research source Try to replace the blown fuel fuse and try and start vehicle. If the fuse blows again, a direct short is present and will need to be diagnosed. Take your car into the shop to get it checked out.
Test for source voltage, to determine whether or not the good charge that’s leaving the fuse is getting to the pump. If no power is making it to the fuel pump, then check the fuel pump relay circuit. You could have a bad relay.
If you show more than one volt difference, that means you’ve got a problem with corroded wires, or that you’ve got issues with the circuit on either the positive or negative side. [3] X Research source Take it into the shop for further testing and advice.
Different gauges may have slightly different instructions, and the location of the fuel pump varies from vehicle to vehicle, so consult your owner’s manual for more specific instructions.
The pressure should match the specifications listed in the repair manual, and should increase as you rev the engine. If it doesn’t, you need to replace your fuel pump and filter.
