Reference diagrams for every GEM control system — hookup voltages, motor color codes, and limit-switch connections. Find your system below and download the PDF that matches your controller.
Installation must be carried out by a qualified electrician and wired in accordance with the National Electric Code (NEC) and all applicable local codes. Before you touch a single wire, shut off power at the breaker and confirm the circuit is dead. Review the troubleshooting section in your diagram completely before starting the install — it will save you time and prevent damage to the controller and motors.
Each PDF covers hookup voltage, motor wiring, and limit-switch connections for that controller family.
GR1, GR2 and GR2F1 controllers — 120/240 VAC hookup, motor color codes, and limit-switch terminals for single- and dual-motor lifts.
GR4 controller — 230 VAC supply with per-motor wiring so each of the four motors is driven and protected independently.
The GRP1 personal-watercraft controller — a compact single-motor hookup for PWC and small lifts.
Step-by-step installation of GEM limit switches for auto-stop and multi-motor leveling — placement, wiring, and adjustment.
Our team in Naples, Florida can walk you through your diagram and help you pick the right limit switches. We're here Monday–Friday, 9–5 EST at 239.642.0873.