Fuel Pump always humming

[MedMantle]

Could a bad ground at the fuel pump be caused because I added other things with grounds to the chassis?
I have installed an Amplifier which is grounded at the rear right seats bolting point. I also have the cheap replica Foglights which I installed into the car's fuse box for the sake of having the dash light come on when I put them on and I installed OEM window winders with a home made harness.
These things couldn't possibly be sapping power from the Pump? I'll go check my Negative Battery Terminal later **

[bronsin]

Originally Posted by MedMantle

Could a bad ground at the fuel pump be caused because I added other things with grounds to the chassis?
I have installed an Amplifier which is grounded at the rear right seats bolting point. I also have the cheap replica Foglights which I installed into the car's fuse box for the sake of having the dash light come on when I put them on and I installed OEM window winders with a home made harness.
These things couldn't possibly be sapping power from the Pump? I'll go check my Negative Battery Terminal later **

Hmmm my advice for a long and happy care free Yaris life has always been don't add aftermarket electrical things like alarms, remote start, etc etc. because of all the problems Ive seen and heard they can cause. I hope this isn't your problem but if possible disconnect each of things one at a time and see if the pump motor doesn't return to normal.

My first move though would be to check whatever things CT Scott says to do!

[CTScott]

Originally Posted by MedMantle

Could a bad ground at the fuel pump be caused because I added other things with grounds to the chassis?
I have installed an Amplifier which is grounded at the rear right seats bolting point. I also have the cheap replica Foglights which I installed into the car's fuse box for the sake of having the dash light come on when I put them on and I installed OEM window winders with a home made harness.
These things couldn't possibly be sapping power from the Pump? I'll go check my Negative Battery Terminal later **

Both of those could contribute. Depending on where you connected to for the ignition switched power for the lights, you may be directly connected to the power feed for the pump, as its power feed is one of the only easily findable ignition switched power feeds on the face of the under dash panel.