Electrical Temp gauge issues

[Dave78CJ5]

Hi guys, just installed a new temp gauge and sending unit, and the needle just bounces around Cold no matter what. Any suggestions as to the problem would be greatly appreciated! And yes, I hate electrical stuff!
View attachment 26AB068F-0B7E-4EA7-AFBE-230BAA549E89.MOV

 

[Lumpy Grits]

Sounds like a grounding issue.
Hope you didn't use Teflon tape on the sensor.
Also, run a hardwire lead from the dash panel to the battery NEG(-)post

 

[JimsCJ5]

I've been installing digital gauges in my old vehicles. They are cheap (around $10 on ebay) and are pretty accurate. Plus they can be used as a fan switch. Why guess?
Digital Temp Controller

 

[j6824]

What Lumpy said...

If it's not that, the gauge is probably no good...especially if it's a Crown or Omix replacement (can't see your vid)

Have had two that were bad out of the box