Relays
All the relays are 12 Vdc relays. The relays on the microprocessor PC board are interchangeable. The relays mounted on the inside of the control box are interchangeable. The relays on the microprocessor PC board are not interchangeable with the relays mounted on the inside of the control box. Test a relay by interchanging it with a known good relay.
Pull Relay
The Run relay (RL1) is located on the PC board. The RL1 LED on the PC board will light up when the Run relay is energized.
Hold Relay
The Ignition relay (RL2) is located on the PC board. The RL2 LED on the PC board will light up when the Hold relay is energized.
Throttle Relay
The Throttle relay (RL3) is located on the PC board. It supplies power to the throttle. The RL3 LED on the PC board will light up when the Throttle relay is energized.
Quad Relay
The Quad relay (RL4) is located on the PC board. The RL4 LED on the PC board will light up when the Quad relay is energized.
Start Relay
The Start relay (RL5) is mounted on the inside of the control box. It is energized by the controller after proper preheat time has occurred. When this relay energizes, the starter solenoid receives power and the engine cranks. If the Start relay fails in the open position, the engine would not crank. If the relay failed in the closed position, the starter would continue to crank after the unit started.