How does one test gauges?
02-12-2005, 12:45 AM
#1
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How does one test gauges?
I have the entire gauge panel apart for either some nice cool back lights or that reverse night glow stuff.
The speedometer never worked on the 78, and the tach worked when it wished to. All the other gauges were also iffy and before I spend the cash for another dash (which I am limited in years I now know because of the plugs at the back) I want to make sure I can't get this one working perfectly.
So.
Jim mentioned Hollywood speedometers or something today, but can I test thier needle movement ability at home?
The speedometer never worked on the 78, and the tach worked when it wished to. All the other gauges were also iffy and before I spend the cash for another dash (which I am limited in years I now know because of the plugs at the back) I want to make sure I can't get this one working perfectly.
So.
Jim mentioned Hollywood speedometers or something today, but can I test thier needle movement ability at home?
02-12-2005, 01:30 AM
#2
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BC;
The smaller guages have resistors soldered onto them with values and tolerances listed right on the resistor. Simply use an ohmeter to check their values. Ones like the volt guage have adjustment pots to set the needle. Someone not too long ago posted a pic here of the pot.
Scott
The smaller guages have resistors soldered onto them with values and tolerances listed right on the resistor. Simply use an ohmeter to check their values. Ones like the volt guage have adjustment pots to set the needle. Someone not too long ago posted a pic here of the pot.
Scott
02-12-2005, 03:19 PM
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Hmmm.
I can use an ohm meter I think. I'm just concerned about knowing which wires and which resistors, etc.
I can use an ohm meter I think. I'm just concerned about knowing which wires and which resistors, etc.
02-12-2005, 08:21 PM
#4
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BC;
Not sure how far you have got into the pod/cluster yet, but..... You need to split the gauge cluster (9 little phillips head screws) to expose the bacside of the gauges.and then the resistors will be obvious.
If you really need, I have a spare cluster lying in the shop, I could possible open it and snap a quick shot.
Scott
Not sure how far you have got into the pod/cluster yet, but..... You need to split the gauge cluster (9 little phillips head screws) to expose the bacside of the gauges.and then the resistors will be obvious.
If you really need, I have a spare cluster lying in the shop, I could possible open it and snap a quick shot.
Scott
02-13-2005, 03:40 PM
#5
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I have it all apart scott. Thanks.
I I'm trying to decipher the tesing values on them. Should I be moving the gauge while reading?
I I'm trying to decipher the tesing values on them. Should I be moving the gauge while reading?