Did I Mention The Temp Gauge Is Kicking My Butt

[4tiresngas]

Okay, I've messed with this thing for way too long now. I have replaced the sending unit (one for a gauge). I've ohmed out the wire all the way to the printed circuit board. I had an open on the printed circuit board, so I replaced it.

Then my needle pegged to the left and would move just a little more to the left when i cranked the truck.

Smart me...I took the gauge out and moved it back to the right. Now it does not move at all when I crank the truck.

It has 12 volts going to it and the resistance of the gauge measures 50.2 ohms.

Any ideas? Idiot lights are starting to look good...lol

[pjmoreland]

Here's the original post:

http://67-72chevytrucks.com/vboard/s....php3?t=172875

Here's the second post:

http://67-72chevytrucks.com/vboard/s....php3?t=174001

I'm confused. I thought the needle was pegging to the right (H)?

[pjmoreland]

With the green wire disconnected from the sender, I measured the resistance between the terminals on my gauge. It's 50 Ohms. I also measured the resistance of my sending unit when the engine is cold (green wire still disconnected). It's about 700 Ohms.

Now that you have a new printed circuit board installed, it might be a good idea to try disconnecting the the printed circuit board from the gauge, disconnect the green wire from the sender, and check the continuity from the green wire through the printed circuit board. Also make sure that there is no continuity between the green wire and ground (not shorted).