Dash help please

Found this on this website:
1969 Plymouth Barracuda Restoration
I cant vouch for any of the info.


"Fuel Gauges
While the gauges are interchangeable, the gauge faces use different lettering styles in ’67 - ‘69. So you want to look carefully at what you have, comparing it to the photos.

Original Gauges

The fuel gauge on a ’67-’69 Barracuda is also the instrument voltage regulator. The gas gauge works only if it gets a signal from the sending unit.

(IVR) -- if it fails, the fuel and oil pressure gauges won't work.

The IVR is built into the gas gauge. With the gas gauge open, you can see the little bimetal strip that heats up and cools causing a fast on/off series to make the gauge read correctly.

Rob Robinson - ’68 Fastback

Quick test is to go to the wire where it plugs into the tank and ground it. If it comes up to full it is either the sending unit or your metal strap from the gas line to the sender unit at the tank is missing.

Rob Robinson



If it really is bad this is a great chance to upgrade to the solid state IVR. Here's some good reading on the subject: Vintage Chrysler electrical repairs and updates (part 2). Or you could send it to an instrument restorer.

Josh Walton"