Glow plug controller question

[emmer]

Is it normal for the glow plug controller to keep cycling after the truck is started,warmed up or not?

My truck does it every single time and the lights dim and the volt meter needle flicks to one side about 5 or 6 times.

thx for any help

Joe

 

[Fordsandguns]

Yep, that's normal.

 

[dieselrunner]

Yep, that's normal.

X2.