I have a 2000 290B Classic. I have a switch outside underneath or bottom side of the front cap that I can't seem to find the purpose of, anyone have any idea of what this switch does. It appears to be from the manufacturer.

See my answer to your question under the General section , new owner part 2

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Jim L & Faye
2805C
2003 Silvarado diesel crew cab
2017 Silvarado, crew cab 1500 6.2L gas w/ 8 speed tranny
central VA

It took me a month or so to realize the switch under the cabinet near the door in our trailer was for the "porch light". Wonder why it's not in the manual?

- Jack

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Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System, SoftStartRV mounted on A/C
2024 F150 Platinum FX4 3.5L PowerBoost SCrew

The switch underneath the front cap is for the outside light over the front window. This is the only switch that controls the light. If the light doesn't work, the bulb might be burnt out. I have the same setup on my unit.

Bob

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2014 FR Heritage Glen 282RK
2013 F250 HD 6.7L Diesel
Formerly Owned: 1995 22D Fun Chaser & 2901L Classic