Q: If I disconnect my negative side of my battery and my car continues to run is my allternsttor ok

You may have a bad relay or faulty switch for the sunroof. If the sunroof doesn't move at all I would have a technician come out and test voltages from the switch and relay and to diagnose the problem. (https://www.yourmechanic.com/services/power-moonroof-is-not-opening-inspection)...

I would start by having the battery charged and tested. More than likely, however, the battery will require replacement since the vehicle has been sitting for years. There is no reason to assume the starter went bad just from sitting....

This vehicle came with three different engines and they all have different directions to replace the sensors. The sensors also may have specialized removal and installation procedures that require special tools for the seals and sensors. The code P0344 is...

A bad mass airflow (MAF) sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-mass-airflow-sensor) can cause loss of power, no starts, and lean or rich conditions. If cleaning the sensor did not get rid of the P0102 trouble code (https://www.yourmechanic.com/article/p0102-obd-ii-trouble-code-mass-airflow-maf-circuit-low-voltage-input-by-john-nelson), then replace the MAF sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) and...

Hello there, many common faults will cause your 2008 Toyota Yaris to crank but not start. The most likely is the battery (https://www.yourmechanic.com/services/battery-replacement), fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement), battery terminals (https://www.yourmechanic.com/services/battery-terminal-ends-replacement), starter (https://www.yourmechanic.com/services/starter-replacement), battery cables (https://www.yourmechanic.com/services/battery-cable-replacement), ignition switch (https://www.yourmechanic.com/services/ignition-switch-replacement), or a wiring...

Hi there. The lightning bolt on the dash means that there is a problem with the electronic throttle control system in your vehicle. Get a code reader and scan the engine for any logged codes. The light may be on...

Considering that this answer is only based on reading your question and not based on any other knowledge I have as to what you are trying to do, typically inputs are given to ECUs by means of different types of...

Hi there. The fuel pump relay is located on the fuse box, the second relay on the bottom near the locking tab. The location port is C1051 for the fuel pump relay. If you need further assistance with the fuel...