Heated tank sensors

[RVbuying]

On a 2020 Montana high country my heated tank sensor switches are at the front door control panel. They don’t illuminate when switched on. Not getting a 12 volt signal? Or does that matter when hooked to shore power?

[chuckster57]

Are you getting 12VDC to the switch? easy to verify if you are with a Volt?ohm meter. Take the control panel off and look at the switch, does it have 2 or 3 posts and is there a wire connected to each?

[KRumm]

Maybe the red lights only come on when the heating pads thermostats get below a certain temperature and draw current?...

[chuckster57]

Maybe the red lights only come on when the heating pads thermostats get below a certain temperature and draw current?...
To my knowledge, tank heaters are either on or off and don’t have a thermostat. I could be wrong and I’ll wait for someone with more knowledge to reply.

[LHaven]

The word "sensor" shouldn't be part of this issue.

My heated tank switches are just plastic switches. Non-lighted. Are you sure yours have lights?

[chuckster57]

The word "sensor" shouldn't be part of this issue.

My heated tank switches are just plastic switches. Non-lighted. Are you sure yours have lights?
I have seen both lighted and non lighted, cheap enough that you could make them lit in red or blue.