You should be able to do them on pretty much any guitar.
It's hard to describe but there's several sweet spots over the pickups where you'll get the best harmonics so try moving up and down the string until you find where it rings at it's loudest and try to remember the positioning.
(keeping in mind the right hand position will change depending on what note you're playing)

Of course you'll have better success with the right equipment. So at some point you may want to think about upgrading to a better guitar and a guitar amp rather than a bass amp. (they're designed for different frequencies..especially if you're using a bass cabinet as well)

A distortion pedal or even better, a multi-effects pedal with both distortion and a compressor will also help a great deal. Especially in helping to sustain the harmonic once you've plucked them.

For full access members there's a tutorial on pinch harmonics showing the sweet spots etc., posted here:

http://guitartricks.com/lesson.php?input=1618