67 cuda instrument cluster

mvh said

One common reason for the temp gauge not reading is the failure of the instrument voltage regulator. This is a solid state unit built into the fuel gauge (odd, but true). You can buy a unit to replace it, but it has to be soldered in.

You can remove, or just tilt out the instrument cluster to access the back of the gauges, but there are a lot of connections. I would recommend following the procedure in the factory service manual, so as not to miss a step and possibly damage something. The pins in the big circular connector are particularly fragile.

Oh, just because you don't see a wire attached to those pins doesn't mean they aren't wired. That blue board is a printed circuit board, and the gold traces on it are the instrument "wires". So that's another fragile component.

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Its not a solid state regulator built into the gas gage, its a vibrating point type inside the gas gage. I would know, i opened up and carefully removed the point type one from inside the gas gage, and soldered up a solid state NTE 960 semiconductor and capacitor setup thats external on the panel.

No need to solder it inside either. All you need is 3 ring terminals on the wires from the external solid state limiter. One to ground, one to your 12V feed into the cluster for the 3 gages, and one for your 5V out to the gages. You attach the ring terminals to the studs off the back of the fuel gage on the printed circuit card.

Pm me with your email if you want pix of this setup. Dont dissassemble your gas gage to mod it unless your sure not to mess it up. Only have to clip and remove one specific wire inside it to disable its internal regulator.