Kevin,

How do I install dual fuel guages on my boat wiring?

I want to add a second fuel guage on my boat’s upper flybridge helm station. There is an existing fuel guage in my lower helm station.

Thank you,

Mark

Hi Mark,

A fuel gauge needs three wires to function.

• Power
• Ground
• Signal.

For the first two, use your flybridge ignition as the power and ground the gauge at your flybridge.

For the signal use an ON-ON switch similar to this one from Carling to switch your fuel tank sending wire from your upper to lower station.

• Remove the existing sending wire (usually pink) from your gauge.
• Connect this wire to the center terminal on your switch.
• Run a new wire from the lower terminal on your new switch to your upper gauge.
• Run a second new wire from the upper terminal on your new switch to your lower gauge.

Install the switch near your lower helm fuel gauge.

Hope this helps,

Kevin