my FP quit working, and i put in a toggle switch. Any ideas on where the electrical issue may lie?
fuel pump
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 85COE, Nov 19, 2019.
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We’ll need lots more info. Like engine make, model, year, truck model.
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I am guessing my username didn't help. 1985 Volvo White COE with a 300 Cummins, 9 speed. additional info in the pics
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Still a real head scratcher...........
Your fuel pressure quit working????????
Your guage???????????????????????????
Toggle switch for what????????????????
What does a toggle switch have to do with fuel pressure???????????????????
You see where I'm going with this.........
What does a 85 coe have to do with anything.Roberts450, AModelCat and pushbroom Thank this. -
there should be only one wire that turns in the engine and turn it off.
If you are not getting voltage to that wire, then it could be an ignition switch or if so equipped low oil level sensor.pushbroom, Roberts450 and Diesel Dave Thank this. -
Put it in manual. Turn the button/knob next on the Solenoid. It should keep it running. You
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The toggle switch is a type of electrical switch that is identified by the presence of handle or lever that makes it possible to control the flow of electric current/signal from a power supply to a device or within a device. It is a hinged switch that can assume either of two positions ie. ON or OFF. The toggle switch is for the fuel pump to get power, since troubleshooting showed that it wasn't getting any power from the battery.
I said nothing about fuel pressure.
the truck is an 85COE - hence my username
Please excuse me for not being as descriptive as possible. I will endeavor to do better for you next time.
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You said FP
I took that as fuel pressure. You said it quit working, so now I'm assuming it's a guage.
I know what a dam toggle switch is , what I'm unclear on is how it correlates to fuel pressure.!!!
If you were a little more clear in the beginning we wouldn't be having this discussion.
And as far as 85 coe goes. Hell it could be a pete, KW ,Freightliner, mack , ford or Perty much anything.
Now we got that out of the way .
Check for power at the seliniod on the pump. You should be able to manually turn the knob to make pressure again like others have said.Dino soar, AModelCat, Diesel Dave and 3 others Thank this. -
I get the whole switching it to manual schtick, my uncle told me to do the same thing.
I'm wondering if anyone would be able to speculate on where the issue would lie with regards to the fuel pump not getting electric
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