Welcome to the forum, Mr. Ed.
Can you give us some information about your coach ...make, model, year, chassis, engine, etc.?
The reason I ask is that the warning light, if on the main instrument cluster, may not be for the slides.
For instance, some chassis will have a "hyd oil" or some other similarly lettered warning lamp for the power steering and/or sometimes the radiator fan if hydraulic should the reservoir be low on fluid. The slides will usually have a separate reservoir.
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