Extra Wire on Fuel Pump Hanger?

[SupraDrew]

My fuel pump died and in the process of replacing that pump I have been replacing other parts that looked old. One of the parts that I have replaced in the fuel pump hanger, I order a new one from Toyota. After getting it I noticed that it has an extra wire that is attached to the hanger. This wire connects to a little black box that looks like a resister. Part number on it is 90980-04047 250/0.47 N. Looking at the size of the connector on the end of the wire it looks to connect to the positive side of the pump. Does anyone know if I need to use it, or if it is needed, or what is does?

Any information on this would be really appreciated!

Thanks

 

[arknotts]

lol...I googled the part number and found this discussion on supraforums:

http://www.supraforums.com/forum/showthread.php?t=357512

Consensus seems to be that it's just a noise filter, though I can't say for sure.

 

[SupraDrew]

I googled it so many different ways, but I never thought of that. I guess I will hook it up and see if I notice any difference.

Thanks for the help.

 

[IJ.]

Yep it's just a surpressor, there's one on the Hatch glass heater as well and a couple of others throughout the car, must have had some noise on the line back to the ECU at some stage.

 

[3p141592654]

Fuel pumps generate a lot of high frequency noise from the brushes. This prevents that crap from getting into the rest of the electrical system.

 

[leftfoot]

Thank you for posting this by the way, this is why forums (this one especially) are life savers.

One follow up question for the nearly two year old question:
Does the filter ultimately get hooked to ground or to the positive side of the pump?

 

[IJ.]

+ side

 

[leftfoot]

+ side

Thanks IJ.

 

[IJ.]

Thanks IJ.

Welcome LF