68-70 rally gauge resistances

[6869]

Can someone please tell me the resistances for the oil, temp, and fuel gauges at low middle and high. Thanks Tim

[Plumcrazy]

Chrysler made a tool for checking guage calibration. It's basicly a can with two wire leads attached to it with a three position rotary switch that selects one of three resistance values.

The LOW position is 73 ohms
The MIDDLE position is 23 ohms
The HIGH position is 10 ohms

Temperature guage (a little vague)
The L position should read "C" plus or minus 1/8th inch
The M position should read in the driving range left of the 1/2 position on the dial.
The H position should read "H" on the dial.

Oil guage (also a little vague)
The L position should read "L" plus or minus 1/8th inch.
The M position should read 1/2 on the dial
The H position should read "H" on the dial

Fuel guage (better)
The L position should read empty plus 1/32nd or minus 3/32nds
The M position should read 1/2 on the dial
The H position should read full plus 3/32nds or minus 1/32nd

[6869]

My friend you rock, Thanks very much. I actually have a gauge tester from ford that works on all gauges. Thanks For the help

[pettybird]

what power source (volts) for this?  i'm going to pull my cluster apart and I might as well screw with this, too...


awesome information, though!

[Plumcrazy]

what power source (volts) for this?  i'm going to pull my cluster apart and I might as well screw with this, too...


awesome information, though!

If the voltage limiter is installed in the cluster just feed battery voltge to the correct pin on the circuit board connector, the limiter will produce a pulsating 12v output that averages out to 5v.

Or if you have an adjustable power supply, feed 5v directly to each gauge.