Hi, I just took ownership of a 1972 Demon 340, When it arrived I noticed the Fuel & Temp gauges don't work along with the Radio. The guy I bought it from said that they worked before he shipped it and the only thing he did was changed the battery before it left. I just got the car yesterday so I haven't had time to look it over, but thought I would ask here where to start.

Thanks

gauges might be out already due to the little voltage limiter plugged into back of instrument cluster (its directly behind those 2 gauges)

Radio..original or aftermarket? If original the speaker is either rotten or it's baked. it has a red wire/orange wire pigtail that plugs into the rest of the dash wiring, and a lime green/black wire that runs to speaker, check those connections, and the ground strap on the radio.

When I got my duster I though the radio didn't work, i didn't even hear a "tink" when i turned it on. Well, speaker was rotten.

Ok, thanks, if it is the voltage Regulator is it replaceable? Do I have to replace the Gauge cluster? Hoping it was a fuse or something simple.

Thanks for the help.
Tom

Also noticed the buzzer for the key doesn't sound, could they all be tied together some ware??

the Voltage limiter is replaceable, they tend to run around $35, i found a more modern replacement on ebay for $25.

typically you have to unscrew the cluster and pull it out enough to remove limiter and put new one in.

Key buzzer is usually a little yellow rectangle box (fits in your palm) and it's usually mounted above the drivers side kick panel into the body with a wide wiring connector plugged into it. might be missing or you have a bad connection.

Thanks again I know where to start now.