Watch the 1-4-5-4 Reggae #1 online guitar lesson by Andrew Ford from Bass Groove Survival Guide
Here is the basic 1-3-5 or triad pattern that outlines each chord. Nothing fancy here, but there is a way to play it that allows the bass to sing, but also provide the foundation as well. I use different levels of muting depending on whats going around me musically.(ex, full mute, partial, mute fing, no mute) Check it out.