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.
What kind of temperature gauge does a jeep have?
The type in the Jeep is a NTC (Negative Temperature Coefficient) which means that as the temperature goes up, the resistance goes down. From the passenger side which is left to right in the picture above. Temperature Gauge A Terminal – Jumper from fuel gauge A terminal (Jumper Strap regulated to 5v)
Where are the ResistanceS on the fuel gauge?
The fuel gauge should have the following resistances … 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.
What does 12 volts on fuel gauge mean?
A reading of 12 volts on the temperature side indicates a bad Jumper/Regulator Strap. 12 volts applied to the temperature gauge’s A terminal will cook the gauge. The fuel gauge should have the following resistances …
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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 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 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.
Where is the fuel gauge on a Jeep CJ?
The fuel gauge should have the following resistances 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.
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.
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.
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.