MUST WATCH - Can a Test Light Damage Your Cars PCM ?

In this video we are going to go in depth on whether you run the risk of damaging your cars computer (PCM, ECU, ECM) by using a test light to send voltage on different signal wires for sensors on your car when said sensor only sends less voltage than battery voltage. But not just that, I am also going to show you safe way you can send voltage to your pcm without even using a test light. Please Consider Supporting me on Patreon at :   / rnw   Facebook:   / ratchets2015   Twitter:   / ratchets15   Instagram:   / ratchetsandwrenches   Disclaimer: Due to factors beyond the control of Ratchets and Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchets and Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchets and Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchets and Wrenches.