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.
Bi-Fuel Relay Module
The bi-fuel relay module contains 2 replaceable fuses. Fuse No. 1 (3-amp) protects battery feed (BATT) to compuvalve. Fuse No. 2 (10-amp) protects BATT feed to bi-fuel power relay which protects VPWR circuits of compuvalve.
Bi-fuel relay module also contains 2 mini ISO relays: the bi-fuel power relay and fuel pump cutoff relay. Bi-fuel power relay provides power to compuvalve when ignition is on. When ALT/GAS fuel switch is placed in ALT position, fuel pump cutoff relay interrupts power from gasoline fuel pump relay to gasoline fuel pump.
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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.