bigkevy Posted April 27, 2011 Report Share Posted April 27, 2011 so im pretty sure this is a noob question but does there need to be a fuse between the alternator and the main battery under the hood? 2007 mustang Boyo avn701d hifonics bxi2610 2 olm 2415s hifonics 100.4 2 infinity 6x8s 2 kicker comp cvt 8s Link to comment Share on other sites More sharing options...
lem43606 Posted April 27, 2011 Report Share Posted April 27, 2011 so im pretty sure this is a noob question but does there need to be a fuse between the alternator and the main battery under the hood? Does there need to be? no.. should you yes. Do i have one? nope... 2 Fi BTL N2 18s Fully LoadedSundown Audio NS-1Kenwood 845 HU Clarion EQ4 Juicebox 3100sKnu Wire"Big 3"Mechman 270a156.3dBTeam GG. Link to comment Share on other sites More sharing options...
Kevin Posted April 27, 2011 Report Share Posted April 27, 2011 It wouldn't hurt to have one. Link to comment Share on other sites More sharing options...
Elrey7698 Posted April 27, 2011 Report Share Posted April 27, 2011 No more than 12" from the battery...just for safety... Link to comment Share on other sites More sharing options...
Monergist Posted April 27, 2011 Report Share Posted April 27, 2011 It's not "needed" between the alternator and the battery. A fuse simply protects the components on each end of its connection from excess current. The battery would only need to be protected from the alternator if the alternator's voltage was too high and subsequently overcharging the battery (say, a 16.4 volt charge going from an alternator to a 12v battery). If you're doing big 3, you'll see that the factory 4 gauge from the alternator to the battery does not have a fuse, and changing to 0/1 gauge doesn't require it either. But the positive post from the battery going back to your system should have a fuse. And you'll also notice that the wire coming from the alternator that connects to the vehicle's electrical system has fuses (again, to protect the vehicles electrical components). 1994 Cadillac Fleetwood Brougham Pioneer AVH-P5200BT Hertz Mille MLK-165 Component System Hertz Hi Energy HCX-165, 6.5 Hertz Hi Energy HCX-690 (6x9s) Audison Voce AV K6 Component System Audison VRX 4.300 Audison VRX 2.250 Sundown 4500D SMD 15" XS Power D3400 (under hood) Three XS Power D3100 (trunk) Monster XLN-201 RCAs DC Power Engineering 390XP H/O Alternator Link to comment Share on other sites More sharing options...
lem43606 Posted April 28, 2011 Report Share Posted April 28, 2011 It's not "needed" between the alternator and the battery. A fuse simply protects the components on each end of its connection from excess current. The battery would only need to be protected from the alternator if the alternator's voltage was too high and subsequently overcharging the battery (say, a 16.4 volt charge going from an alternator to a 12v battery). If you're doing big 3, you'll see that the factory 4 gauge from the alternator to the battery does not have a fuse, and changing to 0/1 gauge doesn't require it either. But the positive post from the battery going back to your system should have a fuse. And you'll also notice that the wire coming from the alternator that connects to the vehicle's electrical system has fuses (again, to protect the vehicles electrical components). nice detail there bud. 2 Fi BTL N2 18s Fully LoadedSundown Audio NS-1Kenwood 845 HU Clarion EQ4 Juicebox 3100sKnu Wire"Big 3"Mechman 270a156.3dBTeam GG. Link to comment Share on other sites More sharing options...
Monergist Posted April 28, 2011 Report Share Posted April 28, 2011 It's not "needed" between the alternator and the battery. A fuse simply protects the components on each end of its connection from excess current. The battery would only need to be protected from the alternator if the alternator's voltage was too high and subsequently overcharging the battery (say, a 16.4 volt charge going from an alternator to a 12v battery). If you're doing big 3, you'll see that the factory 4 gauge from the alternator to the battery does not have a fuse, and changing to 0/1 gauge doesn't require it either. But the positive post from the battery going back to your system should have a fuse. And you'll also notice that the wire coming from the alternator that connects to the vehicle's electrical system has fuses (again, to protect the vehicles electrical components). nice detail there bud. Thanks! Just learned half of that in the past few weeks..lol. 1994 Cadillac Fleetwood Brougham Pioneer AVH-P5200BT Hertz Mille MLK-165 Component System Hertz Hi Energy HCX-165, 6.5 Hertz Hi Energy HCX-690 (6x9s) Audison Voce AV K6 Component System Audison VRX 4.300 Audison VRX 2.250 Sundown 4500D SMD 15" XS Power D3400 (under hood) Three XS Power D3100 (trunk) Monster XLN-201 RCAs DC Power Engineering 390XP H/O Alternator Link to comment Share on other sites More sharing options...
MrSkippyJ Posted April 28, 2011 Report Share Posted April 28, 2011 It's not "needed" between the alternator and the battery. A fuse simply protects the components on each end of its connection from excess current. The battery would only need to be protected from the alternator if the alternator's voltage was too high and subsequently overcharging the battery (say, a 16.4 volt charge going from an alternator to a 12v battery). If you're doing big 3, you'll see that the factory 4 gauge from the alternator to the battery does not have a fuse, and changing to 0/1 gauge doesn't require it either. But the positive post from the battery going back to your system should have a fuse. And you'll also notice that the wire coming from the alternator that connects to the vehicle's electrical system has fuses (again, to protect the vehicles electrical components). The fuse really protects the wire not the components. It may add some protection to the components hooked to the wire as well, but a fuses primary function is to keep the wire from heating up and catching on fire. F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
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