How can I check the CJ gauge voltage?
Run an appropriate resistor to the S terminal of the fuel gauge and to ground and check the readings. The temp gauge has the following resistance. A volt meter can be used to measure the voltage between the A terminal of the Temp gauge and ground. It should be pulsing and averaging about 5 volts.
Where to get resistors for CJ7 speedometer gauges?
We will wire these gauges separately now. Second, go to Radio Shack or order resistors online. At Radio Shack I was able to pick up packs of 100 ohm 1 watt resistors (the small ones in the photo below) and 50 Ohm 10 watt resistors (big white one)
What’s the problem with the fuel gauge on a CJ7?
The most common issue I have encountered has to do with the temperature and fuel gauges. Working on a current CJ7 project I finished the wiring and found that both the fuel and temperature gauge were pegging all the way to Full and Hot.
Where does the jumper go in a CJ gauge?
The jumper/regulator strap runs from a voltage regulator inside the fuel gauge (terminal A) to the temperature gauge (terminal A). A voltage reading at terminal A of the temperature gauge should be approximately 5 volts.
What happens when CJ gauge does not move from empty?
If the gauge does not move from EMPTY either the wiring has an open circuit (no voltage, or no connection to ground) or he gauge is bad. If it does move, the sending unit is bad. The sending unit can be checked with an ohmmeter to measure the resistance between the round sender post (pink wire) and ground.
Do you know how to read battery charger AMP meter?
Consequently, it may damage your car battery. But, when you are skilled enough to read your charger amp meter, it will extend the battery life. This is the reason you should know how to use or read a battery charger amp accurately.
What to do if your gas gauge does not move?
Check the gauge if the needle moves toward “Hot”, the wire from the gauge to the sending unit has an open or bad connection. If it does not move, connect a test light by grounding one end to a good known ground and the other end to positive side of the gauge (typically a pink wire). If it does not illuminate, ensure the gas gauge fuse is good.
What should the voltage be on a CJ gauge?
S to A 19-21 ohms A volt meter can be used to measure the voltage between the A terminal of the Temp gauge and ground. It should be pulsing and averaging about 5 volts. If it reads 12 volts the Jumper Strip/Regulator is bad. If it reads 0 volts, it has been burnt out.
Why are all the Jeep CJ gauges dampened?
The dampening mechanism is basically some thick grease on the movement’s pivot points. The reason all the meters are dampened is because the senders do not have a very constant resistance. If you put a good testing meter on the sender while the motor is running you will see the resistance bounce all over the place.
How to know if your CJ battery is draining?
3 Put a voltmeter from the battery post to the battery cable. If you get a reading around 12 volts, you DO have a drain. To find it, replace the battery cable and then do this: 4 If you get something close to 12 volts there is something in that circuit that is pulling a load.
What would cause a fuel gauge to peg way past full?
Re: What would cause a fuel gauge to peg way past full? Generally, if your gauge is reading past full and the tank isn’t full, it’s the positive wire that has a connection problem. If it’s reading totally empty, it’s the ground. If your tank if full of gas right now; I’d drive it for a while and see what happens.