newby
Well-Known Member
Changed voltage reg on back of fuel cluster but still no movement. Grounded both gauges and nothing.Anything else I can try to figure out what's not right?
any other ideas?
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1968FormulaS340
Well-Known Member
Did you check for power?
newby
Well-Known Member
Yes there is power,
green1
Well-Known Member
Good ground?
67Dart273
Well-Known Member
Well, get your meter--or test lamp. All electric gauges should be supplied from the voltage limiter except the ammeter.
So with key in run, you should see battery on one side of the limiter, and if it's an old mechanical one, "pulsing" on the gauge side, or about 5V if it's a solid state replacement.
If you have juice there, and grounding the sender terminals of any of the fuel/ oil/ temp gauges does not cause the needle to peg, then you have a big big problem.
MAKE SURE you are actually grounding the sender end. That is, make sure you are grounding the correct gauge terminal and that you are REALLY grounding the terminal.
So with key in run, you should see battery on one side of the limiter, and if it's an old mechanical one, "pulsing" on the gauge side, or about 5V if it's a solid state replacement.
If you have juice there, and grounding the sender terminals of any of the fuel/ oil/ temp gauges does not cause the needle to peg, then you have a big big problem.
MAKE SURE you are actually grounding the sender end. That is, make sure you are grounding the correct gauge terminal and that you are REALLY grounding the terminal.
newby
Well-Known Member
Got instrument panel out now, any way to troubleshoot without it hooked up in the car? Back of panel looks good, no corrosion,no loose pegs,no cracks.Black wire with tracer hot on both plugs with key on , orange wire hot when lights are on in both plugs. Is there a better way to ground panel aside from stock.Can gauges be checked out of the panel. Go easy on me not very good with electrical.
newby
Well-Known Member
There was never any power at the fuel wire at the gas tank nor sender wire at the temp gauge.
67Dart273
Well-Known Member
What year/ make / model?
These are a simple circuit, and you can 'rig' it out of the car if you wish, or check it "dangling" plugged into the car harness.
I would DEFINATELY run a separate ground wire permanently from the cluster to the body "just because."
For testing, you have a simple circuit.
You have switched ignition which makes it's way to the input of the instrument limiter. This drops the battery (12-14) down to "pulses" in the old regulator, or about 5V in the newer electronic replacements.
From the limiter, the 5V goes to one side of ANY gauges except the ammeter, IE temp, oil, fuel.
Then the sender terminal of each gauge goes to it's sender.
You may have printed circuit problems on the dash cluster. Examine the connector to see if the pins are broken loose. It should be a simple matter to follow the PC traces to the gauge connections and go from there.
These are simple. Don't make it harder than it is.
These are a simple circuit, and you can 'rig' it out of the car if you wish, or check it "dangling" plugged into the car harness.
I would DEFINATELY run a separate ground wire permanently from the cluster to the body "just because."
For testing, you have a simple circuit.
You have switched ignition which makes it's way to the input of the instrument limiter. This drops the battery (12-14) down to "pulses" in the old regulator, or about 5V in the newer electronic replacements.
From the limiter, the 5V goes to one side of ANY gauges except the ammeter, IE temp, oil, fuel.
Then the sender terminal of each gauge goes to it's sender.
You may have printed circuit problems on the dash cluster. Examine the connector to see if the pins are broken loose. It should be a simple matter to follow the PC traces to the gauge connections and go from there.
These are simple. Don't make it harder than it is.
newby
Well-Known Member
It`s a 68 dart gts. Pins are all good not lose or broken. going to try cleaning circuit board with eraser and clean hold down nut`s.Will also add ground wire sounds like a good idea. Just bought car 2 weeks ago haven`t really driven it yet . Also need to sort out climate controls ,previous owner took out air conditioning unit ,only under dash components remain but not functioning.He ran hot switch to blower motor ,on or off.
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