I think '01 and up were all the same, not sure. They're less susceptible to corrosion than the '99 & '00, but my '01 fell victim a couple years ago.
Generally the FI light will at least flicker when the loom is acting up, sometimes dimly/quickly so it may not be obvious in daylight. When mine first started showing signs hitting the kill switch off-on fixed it so I figured it was the switch contacts, which can also act up. I assume there was a little bit of resistance in the switch adding to the growing resistance of the loom because the problems started coming back quickly, then got real bad. I checked the computer for fault codes and it had a bunch. Knowing that the loom is a common connection to all the sensors I finally cut into it and it was pretty bad.
BTW, we're calling it the loom, harness, etc., I think the proper term is 'check connector' or something like that. All of the sensor grounds come together at that connector so when the resistance goes up from corrosion you can get several fault codes. Under the seat near the ECU is a two wire connector, you put a wire in it to connect those to each other and the FI light will flash the fault codes.