Locate the main power wire from the ignition switch to the ignition system. I usually dont switch the battery cable to the starter which in return doesnt kill the alternator wires power either but if you run it carefully and treat those wires like they are battery cables to be protected you wont typically have any problems.
Speedway Four Post Battery Disconnect Isolation Kill Switch
How to wire a battery disconnect switch with alternator. I took the post that would connect to the exciting wire from the ignition and looped it back around to the battery post on the back so its self energizing more or less and doesnt require a switched source. Cut the positive battery cable near where the switch will be located. On most any application i usually run the one wire set up and simply hook the one wire to the terminal on the starter that the battery cable hooks to. The ignition switch is in the run position. The battery cable should be a minimum of 2 gauge wire. Look for a wire marked 904 on the lower rh side of the attached diagram.
Connect one ring terminal to one main stud terminal on the switch and connect the other ring terminal to the other stud. Connect a battery cable from the starter or starter solenoid to one of the 12 switch terminals. But adding on off switches to the circuit you can force the alternator to charge the battery you want charged. Connect a jumper wire from the alternator output terminal to one of the 316 terminals. Cut the green wire and solder the 40 of green wire between the two pieces. Is hooked to the other terminal the motor will continue to run.
If you have any questions or doubt about how to use install or wire any battery switch consult a certified marine electrician. An alternator field disconnect is used to protect the diodes in an alternator when the battery switch is inadvertently turned to the off position. Hook up the alternator charging output wire and battery to one side of the switch and the supply to the rest of the car to the other also including fuel pump if thats were you are having it powered from as the alternator needs to be allowed to release any built up power or the diodes in the alternator can pop. Polarity does not matter. Wire goes to the battery side of the switch. Below is a description of the operation of an alternator and how the afd works.
Im running a battery disconnect at the trunk so when the switch is on the alternator is seeing current. When the switch is off the alt. Cut this wire and install a 14 female spade terminal on each cut end. Turn the car off and disconnect the negative battery cable. An alternator is basically an ac generator powered by the engine. Wiring the 4430 kill switch.
Will still have a hot wire going to it. Nhra states that the engine has to shut off when the switch is turned off. Install 38 ring terminals on each cut end. Essentially it turns off the alternator output. Battery disconnect switches help manage the overall use of electrical power on board.
Gallery of How To Wire A Battery Disconnect Switch With Alternator
