Though our box is on the ceiling of the electrical bay, streetside foremost, your model coach may have it elsewhere.
That said, individual slideout failures are commonly due to a faulty solenoid. If I recall correctly, and thats a big if these days 😁 , the front curbside one on a four slide rig (electric bed slide but hydraulic genset) operates via the 4th pair, or one of the end pairs of solenoids in the pack/manifold. The pack should be with the fluid tank under the entry steps next to the genset. Solenoids that stick or with some sort of dirt occluding a seal won’t allow fluid flow. Some say to replace them in pairs, others say single is okay, and some reclaim them with new seals. When mine act up by popping out a closed slide an inch, simply cycling its switch out a second then back in is the fix; it clears the seals apparently. More information about the slide solenoids may be found searching herein for posts on that topic, using the Search tab in the above left menu line.
But if your slide isn’t operating at all, it could indeed be electrical instead.
-Joel
I’d post pix, but for some reason the site won’t accept even my low res ones anymore 🫤
