Engine block heater. Working or not

Which outlet? The one under the drivers door or the one under the bunk? The block heater is under the door as for indicator light I am sure there is none. At least not on my 2015

 

There's a few ways.On my cat you can actually feel the heat where the heater element is in the block. If you listen carefully you can hear it too. Sounds like a kettle warming up. You should feel the cord being a little warm especially a cheap one. When you unplug it you might see a tiny blue spark from you breaking the circuit. If you start up a dead cold engine compared to one that was plugged in thats a dead giveaway. Detroits sound like parts are going to fly out of them at any second lol

 

Get a cord with a lighted plug on the end. That'll tell you if there's power to the cord.

 

An easy way. In the morning when before you start your truck turn the key to the on position and read what the water temp is.

 

-Top light is for power avail.

-Bottom indicates when the heater is actually running.

You have the optional thermostatic controlled block heater..... That's good !!

...it saves power by turning the heater on and off as necessary.



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Ding!
Freightliner will be about 65*. I'd imagine a Vulva somewhere close to that.

 

Stick something metallic into the end of the cord..... you'll know if its got power.

 

Hahaha