1998 honda passport themostat location ?

There isn't one. Just a relay

https://www.justanswer.com/honda/c55up-1999-honda-passport-gas-cut-off-switch-needs.html

PGM-F1 top left

https://images.app.goo.gl/NWYyYSzLAQKm975s7

https://www.google.com/search?q=1998+%22honda+passport%22+fuel+pump+reset+switch+location
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Usually threaded in thermostat housing...has a 2 sometimes 3 wire plug

1995 HONDA PASSPORT REPAIR MANUAL


for the easy solution download the pdf file

On the WEB
images for 2000 honda passport thermostat location

if you follow your top radiator hose it should lead to your thermostat houseing .the thermostat is located under that

Your thermostat is located under the intake you must remove the upper and lower plenum to change thermostat.

you will find the thermostat in the housing where the top radiator hose goes onto the engine....hope this helps.....cheers

Top front of engine follow the top radiator hose to where it goes to engine it will be a rounded top housing the hose clamps directly to it take off housing thermostat inside.

for replacing ... http://www.2carpros.com/forum/1998-honda-passport-replacing-thermostat-vt350888.html

The neutral satety switch is located at the Right Side Of Gear Selector.

Normally attached at opposite end of throttle linkage. Remove your air cleaner intake hose at throttle body, and observe throttle plate that opens & closes as you press accelerator, it will be at the end of that, on outside of housing.