ok so i bought a nitrous kit and it came with a 5 prong relay instead of a 4. someone told me that the 5th prong is for a fuel pressure cut off switch...i have a red, black, yellow, blue and white wires that come out of it...i know black is ground but what do the others go to...any feedback is appreciated...thanks

I haven't came across a 5 prongs but usually the 4 prongs. Don't know which brand you got, so I post 3 brands that I normally installed.

try these sites:

http://www.nitrousexpress.com/Instructions/main.htm (nx)

http://www.holley.com/TechService/Instructions.asp (nos brand)

http://www.zex.com/ (the purp)

k thanks...i did a lil more research and for my setup one of the prongs isnt even used and i found the color diagram as well...