Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Constant Speed Operation
During constant speed operation, both the pulse and park relays are closed. Speed is controlled by connecting resistors between the shunt field and ground. In "LOW", the shunt field is grounded directly at the dash switch. In "MED" speed (some models) a 20 ohm resistor in the park relay and a 13 ohm resistor in the switch are connected in parallel to ground. In "HIGH", the 20 ohm resistor in the park relay connects the shunt field to ground.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.