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.
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 is the fuel sending wire on a Jeep CJ?
The fuel sending unit wires are located on top of the gas tank where they are hard to get to without dropping the tank. The fuel sending unit should have a pink wire with voltage on the isolated center post. The other black wire on the sending unit with a tab style connector is a ground to the frame.
What should the sender gauge read on a Jeep CJ?
If there is no resistance, your gauge should read 80 psi. DO NOT hold it for long in this position. If the needle does not move from zero psi then, either the wiring (open circuit) or the gauge is bad. If it does move, the sender unit is bad. It is very common for the sending units used with the 258 and 232 engines to be inaccurate.
Why is my CJ gauge not moving on my Jeep?
Jeep CJ gauges, like all older Jeeps, will wear out over time. troubleshoot Jeep CJ Gauges and prolong the life of the OEM parts with these simple techniques. If you see your temperature gauge not moving, you may be able to assess and repair the problem in no time.
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.
What are the terminals on a CJ gauge?
Fuel gauge S terminal has a pink wire and runs to the fuel sender. Fuel gauge A terminal is the 12V side of the jumper/regulator strap. Fuel gauge I terminal has a red wire and is the 12 V ignition hot wire. Temperature gauge A terminal is the 5V side of the jumper/regulator strap.
The fuel sending unit wires are located on top of the gas tank where they are hard to get to without dropping the tank. The fuel sending unit should have a pink wire with voltage on the isolated center post. The other black wire on the sending unit with a tab style connector is a ground to the frame.
Why does the CJ gauge read higher with higher oil pressure?
The higher the fuel level or engine oil pressure, the lower the resistance. With less resistance, more current flows and the gauge reads higher. The oil pressure sender and fuel sender are both electro-mechanical devices but the temperature sender is not.
Why is my YJ gas gauge not working?
YJ gas gauge not working! Having problems with the gas gauge? It seems as more time than not the heart of the problem lies in the gauge cluster its self. All those copper contacts usually have some corrosion film impeding proper contact. Take out the screws that holds the dash trim in place.
How does the fuel gauge on a jeep work?
The fuel gauge on your Jeep is powered by the fuel sensor relay. If the fuel gauge in your Jeep stops working, the relay has gone bad and needs to be replaced. The fuel sensor relay is responsible for powering the sensors that, in turn, relay information to your fuel gauge.
Why does my CJ gauge not move from zero psi?
If the needle does not move from zero psi then, either the wiring (open circuit) or the gauge is bad. If it does move, the sender unit is bad. It is very common for the sending units used with the 258 and 232 engines to be inaccurate. Make sure you have a good connection to the sending unit.
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.
Where are the temperature terminals on a CJ gauge?
Temperature Gauge A Terminal – Jumper from fuel gauge A terminal (Jumper Strap regulated to 5v) Some manuals have the positions of these terminals incorrectly identified. You can see the letters stamped in the insulation material around the posts.