Depending on how wet, fresh water salt water will make a major difference.
Dimmer switch
Are you sure that the dimmer switch is working?
If I understand you correctly, the dimmer dial near the headlight switch is turned down; simply turn the dimmer dial until it clicks and the lights should turn on.
AnswerIf the lights work on the flash to pass but do not work otherwise either the switch is bad or the dimmer switch is bad. I just am working on a 1995 Ranger and found the dimmer switch to be bad. I checked the headlight switch and that was good so I found the dimmer switch to be the problem. I jumped the wires after unplugging the dimmer switch and lights come on. Replace the headlight dimmer switch and good to go! Hope this helps.
no
A "dimmer" switch will change the brightness of lights.
Be sure the dash illumination dimmer switch is not turned off.
Yes
If parking and tailights are not working check the fuse If they are working: Bulbs burned out? Dimmer rheostat has an open (switch)
Check the light dimmer switch to see if the lights go dimmer or they stay at the same brightness. It sounds like the dimmer switch is either stuck or bad.
Maybe start with dimmer switch, that's what I did on mine.
Check your dimmer switch under the dash first.