Linc-N-Lite

07/12/2026

Voltage Drop Variable Voltage Sensor Circuit Tester/Simulator
The Voltage Drop Variable Voltage Sensor Circuit Tester/Simulator is designed to assess sensor circuits by using a voltage regulator capable of supplying 1.2 to 30 volts DC. It also includes a built-in circuit load tester. When connected to a variable voltage sensor circuit, this device enables simultaneous testing of all three essential circuits: power, ground, and signal.
Diagnostic Capabilities
This tester helps you determine whether a sensor is malfunctioning or if there is another underlying problem within the circuit
Testing Procedure
1. Connect the leads of your Digital Multimeter (DMM) as follows: one lead to the Power circuit, one to Ground, and the third to the Signal feedback line leading to the ECU.
2. Press the large “red” button on the tester to perform a working voltage drop test on the power and ground circuits.
3. If you detect an excessive voltage drop that falls outside of the specified range, move the ground lead to a known good ground. If the excessive voltage drop is resolved, the issue is located on the ground side. Apply the same method to the power circuit: relocate the power lead to a reliable power source. If the voltage drop disappears, the fault lies within the power side of the circuit.
4. After confirming that both the power and ground circuits are functioning properly, proceed to test the feedback circuit. Adjust the rheostat k**b on the tester to set the desired voltage, then compare the resulting reading with the value displayed on your scan tool. If the voltage readings are identical or very close—allowing for a minor voltage drop typical in ECU input circuits—the sensor circuit is functioning correctly. If there is not a significant discrepancy, the sensor itself may be defective.

07/12/2026

The Linc-N-Lite Variable Resistance Simulator
Features and Capabilities
This simulator/tester is capable of replicating any resistance sensor commonly found in automotive systems. Users can substitute components such as thermistors, whether they are negative or positive temperature coefficient, or sending units like a fuel gauge sensor. Its versatility makes it an essential tool for a wide range of diagnostic applications. The Variable Resistance Simulator is engineered to significantly reduce diagnostic time—often by half or more. This efficiency allows users to quickly pinpoint issues and streamline the troubleshooting process.
Testing Procedure
Operating the simulator is straightforward. Begin by using your multimeter test leads connected to the simulator/tester. Next, dial in your desired resistance value. You can then monitor the input signal through your vehicle scanner. By adjusting the resistance, you will observe corresponding changes in the ECU input. This capability enables efficient circuit testing leading up to the ECU, eliminating the need for lengthy end-to-end resistance checks.
Example Application
For instance, the simulator can be used to mimic a coolant temperature sensor. By doing so, you can observe how the ECU responds to this simulated input, making it much easier to diagnose sensor-related issues quickly and accurately.
Important Note
The Linc-N-Lite Variable Resistance Simulator/Tester is not designed to be used on any power-controlled circuit. Please ensure that you only use this device in situations where the circuit under test is not actively powered or controlled by a voltage source. Using the simulator/tester on a power-controlled circuit may result in improper operation or potential damage to the equipment.

01/30/2026

I have made a run of the Voltage Drop/Variable Voltage Tester and the Variable Resistance Testers.
If interested please PM me for coast and shipping information

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