How To Troubleshoot Car Issues With KAIWEETS HT118E/A Digital AC/DC Multimeter

The KAIWEETS HT118E/A Digital Multimeter is an instrument that brings a breath of fresh air to the world of electrical diagnostics, particularly for those of us in the UK who demand precision and safety in our tools. Having had the chance to rigorously test it in various automotive scenarios, I’m eager to share my experience.

Design & Features

The bright flashlight on the back is not just a fancy addition. Working in dim garages or under the bonnet during twilight hours, was a boon. The meter’s live wire detection, which changes the screen to red, added an extra layer of safety, especially when traFcing circuits under the dash. The stable kickstand and pen slot at the back are small, yet thoughtful touches that improve the overall user experience.


The multimeter does not compromise on safety. Being rated CAT III 1000V and CAT IV 600V, it’s suitable for most high-voltage systems in vehicles, be it hybrid or standard. The double ceramic fuse and thermistor protection circuit provides peace of mind, especially when you’re probing around the vehicle’s electrical system.

Portability & Build

Weighing in at just 0.62 KG and with compact dimensions, it’s easy to carry around. The ABS plastic build feels sturdy, and the added protective case is a nice touch, ensuring it survives accidental drops.


The multimeter boasts an impressive range in its specifications. Whether you’re measuring DC voltage in a car’s circuit or AC current in a charging system, the accuracy range provided is commendable. The range and accuracy in resistance and capacitance readings further enhance its utility in automotive electronics.

How To Troubleshoot Car Issues

The KAIWEETS HT118E/A isn’t just a multimeter; it’s a complete automotive electric diagnostic solution in a small package. The device’s wide array of features can help you solve a variety of car electrical issues. Below are clear examples:

1. Battery Drain Issues

If your car battery keeps dying, you can use the DC Voltage measurement mode to track down any parasitic drains. Simply set the multimeter to DC Voltage, connect the probes to the battery terminals, and look for a reading. A healthy battery should read around 12.6V when the car is off.

To check for parasitic drain, remove the negative battery terminal, set the multimeter to DC Current, and place it in series between the negative terminal and the disconnected cable. Any significant current readout here would indicate a parasitic drain. The Min/Max feature can help you catch intermittent issues.

2. Alternator Problems

Place the probes on the battery terminals while the car is running. A properly functioning alternator should produce a reading between 13.8V to 14.2V. Use the Min/Max function to capture fluctuations. If the voltage isn’t within the range, it may be time to check or replace the alternator.

3. Faulty Fuses

Switch the multimeter to Continuity mode. Remove the fuse and touch the multimeter’s probes to the fuse’s end caps. A continuous beep indicates a good fuse; no beep signifies a blown fuse.

4. Bad Ignition Coils

Set your multimeter to Resistance (Ohm) mode. Disconnect the ignition coil and place the probes on the respective terminals. Compare the resistance reading to your car’s specifications. Deviation from the specified range indicates a faulty coil.

5. Checking the Starter

Set the device to DC Voltage and connect the red probe to the positive terminal on the starter motor and the black probe to a good ground. Have someone attempt to start the car. If the starter is good, you should see a voltage drop. No change indicates a faulty starter.

6. Cooling Fan Motor

Disconnect the fan motor’s electrical connector and set your multimeter to DC Voltage. Connect your probes to the connector terminals and turn the fan on from the car’s control panel. A reading close to 12V means the motor is receiving power but might be defective if the fan isn’t running.

7. Verifying Ground Connections

Switch to Resistance mode, place one probe on the ground wire terminal and the other on any clean metal surface on the car’s body. A low resistance value indicates a good ground, while a high or infinite resistance points to a poor ground connection.

The KAIWEETS HT118E/A Digital Multimeter is incredibly versatile, and its precision ensures that you can troubleshoot these and many more automotive electrical issues reliably. Whether you’re a seasoned mechanic or a DIY enthusiast, this multimeter is indispensable for identifying and solving car electrical problems.

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For UK car enthusiasts, mechanics, and even homeowners who need a reliable multimeter, the KAIWEETS HT118E/A is a stellar choice. Its combination of safety, functionality, and precision make it a must-have tool in your arsenal. The added functionalities specific to automotive troubleshooting make it essential for car diagnostics, ensuring swift and accurate problem detection.

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