In the mornings when I start my truck, I let it warm up for a few minutes. When it's idling I notice my battery gauge drop for a few seconds and then it comes back up. The lights do dim, fan blower motor slows down, and the engine idles down a bit. This only happens for a few seconds at a time. Is it the intake heater cycling? The batteries are fairly new, alternator seems to be charging fine. I'm just curious as to if anyone else has expierienced this. Thanks

 

its just your grid heater kicking on. perfectly normal

 

That's what I figured, just wanted to check. Thanks