Wiring A Relay 87a

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Wiring a relay 87a - after you have all the things and tools you will use now lets make a headlight wiring relay kit first study the 3 diagrams that you will use as your guide on how you want to built your wiring 1 measure the lenght of the wire you need from the stock wiring going to the left to right if your battery is in the right then your wiring should relay diagram bottom view use a 1n4000 series diode available at radio shack and other electronics stores as a drain for static electricity that builds up from deactivating the coil step 4 once the relay has been identified gently grasp or touch the relay in question have a helper turn the ignition key to the on position then crank the engine over the relay should click in one of the ignition switch positions guide to using automotive relays wiring relays is explained in this document understanding relays the relay is probably the most mon electronic ponent.

that will resolve just about any electrical issue or plete any project you have span class news dt 18 03 2017 span nbsp 0183 32 please see my wiring diagram i have the red closest to the green wire connected to the red from the relay the second red closest to the black goes to the add a circuit relays generally have 4 pins marked 85 86 30 87 or 5 pins 85 86 30 87 87a for most automotive relays pins 85 and 86 are the coil circuit and takes 12 volts to activate the switch assuming a 12v rated relay of course