You will be able to reset it, - if tripped. It will move when pushed. If the reset won't push downward, -it wasn't tripped.
The 98 is pretty easy to get to. I can't remember if there's any screws on the kick panel ? I think you just yank the suckers off , - don't you ? Ahhh, there might be a couple screws.
Check the ground right there next to the reset. If that grounds corroded, It won't blow the breaker, - the pump will just quit working. Yea those kick panel grounds (both sides) are pretty impodent (lol). Hell , every ground on these trucks count. I make them part of my every other year maintenance regimen, - same time I flush and swap out the coolant.
Let us know what you find ,