Post for a new cluster in the Parts Wanted forum?
Frank
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| Testing gauges https://slantsix.org/forum/viewtopic.php?t=42204 |
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| Author: | kesteb [ Sat Oct 09, 2010 10:44 pm ] |
| Post subject: | Testing gauges |
The guages in my '73 Duster don't work. I changed out the ivr with a solid state one and they still don't work. The circuit board looks good and pass simple tests. Is there a way to test the individual gauges. They register 900 ohms when testing with a meter. Is this normal? |
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| Author: | Pierre [ Sat Oct 09, 2010 11:41 pm ] |
| Post subject: | |
Check the pins where they meet the traces, they can break off there. I can't remember if they are just staked in or riveted but I do remember mine breaking there. Also make sure when your inserting the harness connector the female pins aren't being pushed out the back. The female pins may have opened up a little so the fit on the male pins isn't secure. |
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| Author: | KBB_of_TMC [ Sun Oct 10, 2010 11:51 am ] |
| Post subject: | |
While I don't know the their resistance offhand, 900 ohms for the stock gas/oil/temp gauges is way, way too high - I'd expect them to be much lower (~50ohms), but I've not measured them lately. I'll try to remember to check my spares tonight. A common 12V test light connected in place of the sensor will work well for gas, oil, and temp senders. Very roughly, ~10ohms at the sensor is Full/High/Hot and ~70ohms is Empty/Low/Cold. The stock IVR will make the test light blink on & off ~2/sec (after it warms up for ~15 sec) and usually they'll read ~1/2 scale with it - a constant 5V regulator will light the bulb dimly would probably read higher (as the bulb doesn't heat up enough), and I don't know about the RTE ones. The 2nd side of a dual ballast resistor is 5 ohms, so if you've 2 of those in series you've got your 10ohms. I'd begin by seeing that you've voltage at the senders and work back from there. Especially check the dash ground when it's installed. |
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| Author: | KBB_of_TMC [ Mon Oct 11, 2010 11:07 am ] |
| Post subject: | |
My 1971's fuel/oil/temp all measure about 12 ohms. |
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| Author: | kesteb [ Tue Oct 12, 2010 8:25 pm ] |
| Post subject: | |
Thanks, methinks my gauges may be toast... Now what to do... |
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| Author: | 66aCUDA [ Wed Oct 13, 2010 7:14 am ] |
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Post for a new cluster in the Parts Wanted forum? Frank |
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| Author: | KBB_of_TMC [ Wed Oct 13, 2010 9:38 am ] |
| Post subject: | |
Gauges can be rebuilt, but it requires very delicate work; you might contact AutoInstruments (http://www.autoinstruments.com). They did a great (cosmetic only job) restoring a Fury instrument cluster faceplate for us. Also note that gas/oil/temp share the same internals and if the layout is the same you can put a new decal on to change one to another. |
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