3000 heat fuel gauge?

[joe201]

I've gotten everything working on this tractor , except for the heat and fuel gauge. If I short eighter of them to ground the gauges move to hot or full.The only thing in the circuit is a voltage stableizer and I checked it with a Vom and got 1.2 K omhs does anyone one know what the resistance is ? or does anyone have any ideals?
thanks joe201
jcoffey_1@verizon.net
 

[RodinNS]

If the gauges default to hot and full when you ground the sender terminal on the gauge then the gauges are probably fine. Beyond that you would look at the wires to each sender and the senders themselves.
You also need to keep in mind that there were different resistance values for the senders and gauges depending on the year... so new and old can't be mixed. I think the change was mid-68...

Rod
 

[Hobo,NC]

The voltage stabilizer controls the voltage by switching it on and off,,, its more of a duty cycle than a stabilizer,,, A resistance check is worthless,,, a analog voltage meter will test it,,, set at 12V and look for the needle to swing on-off-on and have a rhythm to it,, on and off times the same,,, if its out of rhythm it will show a false reading,,, a DVOM could be used but more complicated,,, use either the high low settings are HZ set'n are the average set'n,,, I use a DSO,,, make sure the base of the VR is grounded are it will not work... It achieves a adverage of 5V by switching the power on/off,, if it were on for 1 sec and off for one sec the average would be 6V,,, its simple once yo get this in your head....

Its in the archives somewhere were I posted how it works...