Help! Starter problem... Help

[SR20_beast!]

hey wats up evry1..
i got an 89 240sx
KA dual cam
my starter recently went out, no problem i took it out n got a new one. i put the new one on this past sunday and it started right up with no problems drove it to my friends perfectly fine and went about with my day.
next morning it starts up fine n i go to work.. started up on my lunch break.. its finally time to get off wrk and car does NOT want to start..
i had to tow home.. today in morning i take off the starter and take it to get tested and comes back fine in working order..
i have no idea what the problem might be..
if you guys kno of an idea or sumthing let me kno plz!!
thanks for your time...

[repda916]

you will soon realize how easy these cars are to work on.
Starters need Ground and ign power (black/yellow)
check both
check ign Fuse

[SR20_beast!]

oh ok cool i will check man...
thanks

[stevenwhite1989]

Maybe be a little bit more detailed about what is going on while you try to start it. The more precise you are the quicker you are going to figure it out.

ex. I tried starting it, I cant hear the starter, but my battery is still good.