Essentially it turns off the alternator output. Battery disconnect switches help manage the overall use of electrical power on board.
Battery Switch Diagram
How to wire a battery disconnect switch with alternator. Look for a wire marked 904 on the lower rh side of the attached diagram. The battery cable should be a minimum of 2 gauge wire. Turn the car off and disconnect the negative battery cable. Below is a description of the operation of an alternator and how the afd works. Cut this wire and install a 14 female spade terminal on each cut end. The ignition switch is in the run position.
An alternator is basically an ac generator powered by the engine. 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. But adding on off switches to the circuit you can force the alternator to charge the battery you want charged. Wiring the 4430 kill switch. 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. Cut the positive battery cable near where the switch will be located.
Install 38 ring terminals on each cut end. Connect a battery cable from the starter or starter solenoid to one of the 12 switch terminals. 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. Will still have a hot wire going to it. Im running a battery disconnect at the trunk so when the switch is on the alternator is seeing current. Cut the green wire and solder the 40 of green wire between the two pieces.
Nhra states that the engine has to shut off when the switch is turned off. Wire goes to the battery side of the switch. If you have any questions or doubt about how to use install or wire any battery switch consult a certified marine electrician. Locate the main power wire from the ignition switch to the ignition system. Connect one ring terminal to one main stud terminal on the switch and connect the other ring terminal to the other stud. Polarity does not matter.
Is hooked to the other terminal the motor will continue to run. When the switch is off the alt. 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. An alternator field disconnect is used to protect the diodes in an alternator when the battery switch is inadvertently turned to the off position. Connect a jumper wire from the alternator output terminal to one of the 316 terminals.
Gallery of How To Wire A Battery Disconnect Switch With Alternator
