What gauge wire for 5 series fuel pump in Tii?

[floatinghead]

Getting a new 5 series fuel pump as back up for my old tii fuel pump.  what size wire do i need to jump from new pump to original wiring?

 

thanks,

 

Baron

[OriginalOwner]

I used some wire I had in my box of parts, probably 14 gauge ??

 

An idea is to make a couple of short leads like this.  The spade connectors fit right inside the existing plug .......

  

 

 

If you haven't seen this ......

http://www.my2002tii.com/tii-fuel-pump_how-to.htm

 

 

Cheers,

 

Carl

 

Edited October 5, 2017 by OriginalOwner

[Simeon]

Basically the size of the fuse and the wiring in a circuit should be aligned. The idea is that you need the wiring sized so that the fuse will blow before the wiring melts. Assuming that the new pump uses the same fuse size (sure it does) then make sure that the wiring can carry more current than the fuse blows at. 

 

Sorry, circular and not very informative answer. 

[Healey3000]

If you know the current draw of the pump, you could go to a table of gauge versus current to figure out what is required.  I get lazy sometimes so what I often do is go to the wiring diagram of the donor car and see what BMW used.  Fortunately, BMW wiring diagrams show the wire size information right there on the diagram, so it's a very easy process.

 

My suggestion, therefore, is to go to RealOEM, punch in the part number and see where this pump is used (often, multiple models/years).  Then, search for a wiring diagram on the Internet for that model vehicle and find the pump on there.

[Son of Marty]

If your not going to change the whole wires just go with the gauge used on the car, 14 gauge is probably right, no point in using a heavier wire at the end of a light one.

 

P.S. the 5 series pump has been used before and the OEM wiring harness hasn't been a problem.