Odd Fuel pump issue. Feeling at a loss. - Toyota Yaris Forums

Marchalis · 03-06-2018, 09:55 PM

:Solved:

Lack of sleep over problem was the cause?

When I tested the fuel pump I tested the negative and positive as indicated on the pump.

It was a new pump that looked identical to the old. The plug that went into the pump only fit one way.

I can't say if I installed the pump with the plug somehow back to front or if the motor came in reverse, but changing the negative and positive on the top of the fuel pump unit in the car fixed the problem.

With direct connection with battery to the pump, it will make noise and run in reverse, but connected to the car it will not.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Efficiency and the Yaris	BailOut	Fuel Economy Forum	326	02-15-2025 11:09 PM
Fuel pump wiring help	ATB	DIY / Maintenance / Service	3	03-06-2018 02:06 AM
The Nitrous Thread	ChinoCharles	Performance Modifications	116	02-16-2016 04:07 PM
Which Fuse or Relay powers the Sedan's fuel pump?	MUSKOKA800	DIY / Maintenance / Service	3	12-06-2015 12:38 PM
Low fuel light	falkor_99	General Yaris / Vitz Discussion	35	08-24-2007 04:20 PM

03-06-2018, 09:55 PM	#1
Marchalis Drives: Yaris yrs 2006 Join Date: Mar 2018 Location: Australia Posts: 7	:Solved: Lack of sleep over problem was the cause? When I tested the fuel pump I tested the negative and positive as indicated on the pump. It was a new pump that looked identical to the old. The plug that went into the pump only fit one way. I can't say if I installed the pump with the plug somehow back to front or if the motor came in reverse, but changing the negative and positive on the top of the fuel pump unit in the car fixed the problem. With direct connection with battery to the pump, it will make noise and run in reverse, but connected to the car it will not.