Hi all, I just replaced my 5 volt regulator with the digital do it yourself set up, now my problems are fuel gauge shows half when tank is full, temp gauge pegged hot and oil gauge pegged 80psi+ any and all help appreciated thanx Maxwell 1

 

Are you talking about the voltage limiter? On the back of the dash cluster.

 

yes the voltage regulator on the back of the dash sorry.....

 

Have you actually checked what your homebuilt regulator is outputting with a voltmeter.

I would not CONSIDER putting a cluster back in a car without bench testing after all that was wrong with my 67

Cluster PC board harness connector pins--- these get loose, broken and corroded. Resolder, repair as necessary

IVR. You've already been there, but for others, the brass fingers into which they fit may not be contacting the board traces. Solder jumpers across, and replace the IVR with a solid state one from RTE (or build your own)

Gauges. The gauge units can be bad, or out of calibration. The stud nuts can be corroded so replace the nuts and loosen/ tighten several times

The sender connections all go to the board connector...............

Temp, and oil, if equipped go through the bulkhead so that's one more possible bad connection

The fuel sender wire goes through the tail harness kick panel connector, and in the case of the fuel sender, check that the sender is actually grounded.

And the wire connections at the senders may be loose/ corroded or internally broken.

Of course the senders can be bad/ out of calibration.

Once you get the cluster problems "I think I fixed" bench check it.

All gauges use the same scale. Go to RadShack, etc and get some resistors. You probably want at least 1/2 watt. Gauge "full" is 10-15 ohms, 1/2 scale is 23--15 ohms, and empty / cold is 70--75 ohms

For example, you can buy four 100 ohm 1/2 watt resistors from RadShack and wire all 4 in parallel, which makes a 25 ohms resistor for checking 1/2 scale.

Hook to the sender terminal of one gauge at a time to ground, and turn on power to the IVR, after about a minute the gauge should show very close to mid-scale.

Ground--Clusters depend on some luck for grounding. It's better to add a pigtail ground wire to the PC board and screw to the column support bracket or other ground point.

My 67 PC connector was in such bad shape that I abandoned the original connector, soldered pigtails to the board traces, and used "Molex" style connectors from Rad Shack.

I have no idea what you did with your homebrew 5v regulator, but the first thing to check is that it actually outputs 5v.

 

You see that? No arrogance, and no games. This is the last I'll speak of this

 

This is the same set up you see all over the web made from DIGIKEY parts to so if this is wrong everybody elses would be wrong.... thanx max

 

I never said you didnt give good info. you always do and go over and beyond what you have to. You are an asset to the sight and have alot of knowledge to share. But sometimes you can be arrogant with your answers.. I said I was sorry and its done. As for people questioning the hard work that Ive made a life effort Of.. Such as to be a master tech and scoff at it that pisses me off and he will never get any help from me ever...Bill... So 440 are we good?

 

Was there a reason you didnt use the limiter/regulator made for the car? If the dash gets to much voltage you are going to smoke the circuit board and the gauges so be careful...Bill

 

My thinking was why not make things more reliable and get rid of some antique technology and maybe make things more reliable that's all thanx Max

 

Some times newer is not always better. I said some times...Bill

 

Where is the voltage regulator located, and what does it look like? I've got a 70 also. Thank you so much. J.R.

 

Small tin rectangular box plugs into the rear of the cluster PC board

 

http://www.1970gtxregistry.com/parts...GTXcluster.jpg

Photo to go with what 440RoadRunner said...