Answer
Oct 23, 2025 - 02:16 PM
Here are some ideas to look into to determine exactly what the issue might be,
Likely causes fall into three buckets: power/polarity, controls, or mechanical/cable. On the BAL Accu-Slide (12V, cable-driven) the motor runs both ways with reversed polarity from the controller. If it retracts but won’t extend, something is blocking or failing only on the “extend” polarity.
Electrical-
Battery under load – Extend draws more. Measure at the slide while holding EXTEND:
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At the motor leads you should see ~12–13.6 V with polarity flipped vs. retract.
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If it sags <10.5 V or drops to 0 only on extend, suspect weak battery, bad ground, or high-resistance connection.
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Wall switch – Many are DPDT momentary. Bad half = no extend.
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Backprobe switch: do you get 12V out on the extend pair? If retract side works and extend doesn’t, replace the switch.
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Controller (reversing module) – The BAL controller reverses polarity and current-limits.
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If you have 12V into the controller but no voltage at the motor only on EXT, the controller is tripping/failing. Swap in a known good controller or temporarily bypass (see below) to confirm.
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Fuses/auto-reset breaker – Some rigs split retract/extend through separate protection. Check/reset/replace if only extend path is open.
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Wiring/ground – Common: corroded butt-splices or ring terminals. Extend path may use a different leg/relay contact that’s burned.
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Gearbox binds in one direction – The BAL 25076-1 can have worn bushings or a chipped gear that binds on extend. You’ll hear a click/brief grunt then nothing, or the controller will cut out.
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Cable tension out of spec – Accu-Slide wants fairly tight, even cable tension. Over-tight on the extend vectors can stall the motor only when pushing out.
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Typical field spec many techs use: roughly 60–65 lb on long side / 50–55 lb on short, and equalize corners. If one corner is drum-wrapped or a ferrule slipped, extend will jam.
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Frame/seal drag – Swollen bulb seals, debris on the sweep seal, or misaligned room can let it pull in (retract) but not push out.
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Travel/limit – If the controller “thinks” it’s already extended (mislearned end-point), it won’t drive out.
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