What do the wire colors mean on the RV tank monitor display?

Red 18 gauge is +12 V power input to the monitor, Black 18 gauge is ground, Blue 18 gauge goes to the tank senders, and Green 18 gauge is for the LPG tank.

What size hole do I cut to mount the tank monitor display?

Cut a hole in the wall 3" wide by 1 7/8" high and bring the wiring out through the hole to connect to the display panel connector.

Can I use spade connectors when wiring the tank monitor?

No. The guide says DO NOT use spade connectors to join wires; only use crimp-on butt connectors or solder the wires together.

How much clearance from metal do the tank senders need?

Any metal must be at least 1" away from either side or the top and bottom of the sender, and at least 2" away from the face of the sender.

Can I mix different sender types when stacking senders?

No. The caution note states: DO NOT mix sender types when stacking senders.

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RV Tank Monitor Display Installation Guide - Wiring Colors & Sender Mounting

Tank-sender installation guide page with wire color/function table beside a wiring circuit board

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Installation guide page listing numbered mounting steps and a wire-color-to-function table for tank senders

AI caption July 2022 · Photo 1364 of 1514

This document is Page 14 (Chapter 6 – Installation Guide) of an RV tank monitor system manual, photographed next to the actual display panel circuit board (marked with barcode number 709-021596 and a California Proposition 65 warning). The page provides step-by-step installation instructions: refer to Chapter 7 for troubleshooting tips; mount the display inside the RV by cutting a 3" x 1 7/8" hole in the wall; use crimp-on butt connectors or solder (never spade connectors) when joining wires; connect wiring per the included table before plugging the connector into the display panel; and ensure the system ground ties to the breaker panel ground. A wiring table specifies four 18-gauge wires: Red (+12 V power input to monitor), Black (ground), Blue (tank senders), and Green (LPG tank). Steps 5 and 6 cover mounting the tank senders — they require a flat area on the tank side spanning the sender's full width top to bottom, metal kept at least 1" from the sides/top/bottom and 2" from the sender face, and a clean surface for adhesive. A caution note warns not to mix sender types when stacking senders. This is RV equipment documentation, not vehicle-chassis-specific service literature.

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Frequently asked questions

What do the wire colors mean on the RV tank monitor display?: Red 18 gauge is +12 V power input to the monitor, Black 18 gauge is ground, Blue 18 gauge goes to the tank senders, and Green 18 gauge is for the LPG tank.
What size hole do I cut to mount the tank monitor display?: Cut a hole in the wall 3" wide by 1 7/8" high and bring the wiring out through the hole to connect to the display panel connector.
Can I use spade connectors when wiring the tank monitor?: No. The guide says DO NOT use spade connectors to join wires; only use crimp-on butt connectors or solder the wires together.
How much clearance from metal do the tank senders need?: Any metal must be at least 1" away from either side or the top and bottom of the sender, and at least 2" away from the face of the sender.
Can I mix different sender types when stacking senders?: No. The caution note states: DO NOT mix sender types when stacking senders.

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