An 83 housing is different from a 76 housing as are the sensors as are the way the guages are actuated. If you get a chance to compare them, do so and you'll see what I mean. Different items, different part numbers, etc.

One other point. If your seller who has 'built 5 Z's himself' knew what he was talking about then the guages would all work and you wouldn't be having this problem. Besides you stated earlier that 'you talked to a Z specialist here in TN and he says that the 83 and 76 L28s were vastly different as far as fuel injection, alternator, and mechanics is concerned, but he'd have to see the car to know what needed to be done.' Now, there's someone who seems to have a grasp on things.

True however both of these guys have known each other for years and have swapped tricks of the trade for a long time.

I think the electrical woes stem from a lack of time rather than a lack of knowledge. The car was for his son and as such, neither him nor his son ( who was using the car to go to college) had time to address the issue. The Z specialist didn't know a lot about what needed to be done because I didn't have that information myself.

The seller gives the Z guy some good props and says his rebuilt transmissions are much better than stock pieces ( nationally renowned apparently), but I wouldn't say that the seller knew far less than the Z guy. The latter just wasn't given the information I know now.

My money is on your 10 Amp fuse. It also is the easiest part to check. I noticed on your other posts that your Z has a swapped motor and the guages didn't work when you bought it, so it might be a harness issue. My Z is all original and has never had any electrical problems prior to this one. But in your case I would still start with the fuse.

Yeah from another post in the electrical section, two other guys had the same problems I did ( no gauges EXCEPT volt and speedo) and the 10A fuse was related.

One of the other members, in addition to those maladies, also suffered from no turn signals ( as do I) and he said it was his ignition relay, from which all the circuits from the gauges and the signals run ( I think).

So I'm gonna check the fuse, the ground, and then if all else, replace or clean the ignition relay.

Sound about right?