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flightlead404 flightlead404 is offline
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Originally Posted by JFairman View Post
The only difference is the red relays have a little diode soldered in between two of the terminals.
Diodes let current flow through them in one direction only. I don't know what it's for in this application. I guess it helps protect the fuel pump motors in some way.
Its a "flyback diode" and prevents arcing on the contacts due to current induced when the magnetic field of the relay collapses
Old 04-04-2018, 04:59 AM
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