Most of these "computer relays" are not relays. They are built around a solid state device called a MOSFET which is small enough to live inside the ECU. Similar to a BJT but actuated by voltage, not current flow.
Make bit fun and "electrocute" somebody by that relay. Soon as electric field collapse on control field, there is no escape and voltages rise about 70V and can feel by hand. Sure, it is very short time and non fatal. Why it is possible? Look your diagram...cheap garbage relay without diode. This is very important lesson because if somebody replace the relay and it is computer controlled with diode relay and replacement is without....bye-bye computer.
Excellent to go over the basics and then bring it up to date. Thanks. There's always something different however. For example, I recently bought a spare Main Relay (Ignition and Injection) for my 1990 Miata (a known failure item). I idscovered that although this looked like a standard 4 pin relay, the coil side was different. Instead of the usual 70-150ohms of resistance, both the original Main Relay and the spare had several thousand ohms, so you couldn't simply substitute a standard relay. Why would it be designed this way? Is it because the Main Relay is constantly On when car runs and therefore the higher ohms Coil is designed to operate at a lower temperate (less current) to achieve better longevity??
Realfixesrealfast good Morning take care and have a great day Realfixesrealfast Tutorial great thank you 👏 👌 👍 From Nick Ayivor from London England UK 🇬🇧
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Thank you for sharing your experience. You did a great job explaining this and the editing was outstanding!
Most of these "computer relays" are not relays. They are built around a solid state device called a MOSFET which is small enough to live inside the ECU. Similar to a BJT but actuated by voltage, not current flow.
Make bit fun and "electrocute" somebody by that relay. Soon as electric field collapse on control field, there is no escape and voltages rise about 70V and can feel by hand. Sure, it is very short time and non fatal. Why it is possible? Look your diagram...cheap garbage relay without diode. This is very important lesson because if somebody replace the relay and it is computer controlled with diode relay and replacement is without....bye-bye computer.
Good to see another video series. Thank you for sharing the knowledge. I’ve learned a lot.
Great class as always, thanks for you great capacity to lets the things so easy to understand, thanks
thank you for what you giving us it's so kind from you sir
awesome /great information thanks for sharing.
Excellent to go over the basics and then bring it up to date. Thanks. There's always something different however. For example, I recently bought a spare Main Relay (Ignition and Injection) for my 1990 Miata (a known failure item). I idscovered that although this looked like a standard 4 pin relay, the coil side was different. Instead of the usual 70-150ohms of resistance, both the original Main Relay and the spare had several thousand ohms, so you couldn't simply substitute a standard relay. Why would it be designed this way? Is it because the Main Relay is constantly On when car runs and therefore the higher ohms Coil is designed to operate at a lower temperate (less current) to achieve better longevity??
Boom💥 ! This is dynamite !
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Realfixesrealfast good Morning take care and have a great day Realfixesrealfast
Tutorial great thank you 👏 👌 👍
From Nick Ayivor from London England UK 🇬🇧