I started to plug my truck in tonight and was wondering if there is some dummy light or something for me to know the heater is working right.

Pav

 

I usually test block heaters with an ohmmeter, at the end of the cord. Our trucks will usually show about 19 ohms. Also, if you are in a quiet area, after you plug in the heater, you should hear a faint sputtering sound from the block, like a tea kettle heating up.

 

Same here. Just a light sizzling sound several seconds after plugging in.

 

after the truck being plugged in overnight, just feel the block where the heater is. if its warm/hot it works. if its cold, it doesnt. When i have mine plugged in, my grid heater light will go out pretty fast, if it isnt plugged in, it will stay on for about 10 secs.

 

Ya it works,I did not hear and sound but in the morning the block was pretty fracking warm!

Thx guys.

Pav