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American Autowire Severe Duty Universal Wiring Harness Kit SKU: 6141
American Autowire Severe Duty Universal Wiring Harness Kit
Product Overview:
The Severe Duty Universal Wiring Kit from American Autowire is engineered for enthusiasts who want to do it once—and do it right. Whether you’re working on a fully custom build or just tired of patching together an old wiring nightmare, this system gives you the power, protection, and precision your rig deserves. With labeled GXL wire, sealed connectors, and support for all major aftermarket gauges and accessories, it’s the most dependable, customizable wiring kit on the market. Ready for the trail. Ready for the street. Ready for whatever you throw at it.
Full description
The Severe Duty Universal Wiring Kit from American Autowire is engineered for enthusiasts who want to do it once—and do it right. Whether you’re working on a fully custom build or just tired of patching together an old wiring nightmare, this system gives you the power, protection, and precision your rig deserves. With labeled GXL wire, sealed connectors, and support for all major aftermarket gauges and accessories, it’s the most dependable, customizable wiring kit on the market. Ready for the trail. Ready for the street. Ready for whatever you throw at it.
American Autowire Severe Duty Universal Wiring Harness
For those who demand more from their electrical system, the American Autowire Severe Duty Universal Wiring Harness is the ultimate solution. Whether you’re building a custom trail rig, modernizing a vintage Bronco, or cleaning up an overcomplicated project vehicle, this wiring kit gives you unmatched control, durability, and future-proof design. Its sealed 24-circuit fuse box, high-temp wiring, and marine-grade protection make it ideal for harsh environments—under the hood, in the elements, or wherever you want to mount it.
Whether you're customizing your rig for extreme off-road or building a high-end hot rod, this system offers flexibility and protection other kits simply can't touch. From trail reliability to street performance, it’s the go-to wiring solution when quality and function matter most.
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Sealed 24-circuit fuse box – Mount anywhere, even in exposed or under-hood locations.
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200 amp sealed manual-reset breaker – System-wide protection plus manual shut-off for service or emergencies.
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Pre-terminated GXL wiring – Over 200" of heat-resistant labeled wire for easy routing and diagnostics.
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Electronic LED-compatible flasher – Ready for modern lighting systems right out of the box.
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Compatible with popular gauges – Connects to Dakota Digital, Autometer, VDO, and more.
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Optional accessory circuits – 8 extra circuits and a sealed accessory harness included.
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Includes switches and subkits – Pre-terminated leads for headlights, signals, engine sensors, and more.
Whether you're wiring a custom trail rig or show-ready project car, this sealed 24-circuit wiring system offers durability and flexibility for a clean install.
Instruction 1
Instruction 2
California residents: Proposition 65 Warning
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TACHCOIL --> TACH LEFT DASH IND RIGHT DASH IND HI BEAM INDICATOR LIGHT GROUND DASH LIGHTS GROUND WATER TEMP SENDER OIL PRESSURE SENDER GAS GAUGE DASH LIGHTS GROUND WATER TEMP SENDER OIL PRESSURE SENDER GAS GAUGE GAUGE FEED 12V IGNITION ABCDEF ABCDEF VSS GROUND VSS POWER SPEEDO POWER VSS SIGNAL GROUND VSS GROUND VSS POWER VSS SIGNAL GROUND ABC D pink/white white pink (12V ignition) pink (12V ignition) dk green dk blue tan gray (dash lights) gray (dash lights) purple/white It is best to consult the speedometer manufacturer\u2019s instructions, if you have any questions. Yellow VSS Ground Connect to VSS \u201c-\u201d on speedometer. Purple VSS Signal Connect to VSS input on speedometer. Purple/White VSS Power Connect to 12V power on speedometer. Black/White Speedo Ground Connect to ground on speedometer. Pink/White Speedo Power Connect to 12v power on speedometer. NOTE: This wire will double onto the same stud as the Purple/White VSS power wire from above. see page 8 see page 7 12V IGNITION (Pack-con female terminal, 2 pcs.) VSS Ground and VSS Signal (yellow and purple wires), must be twisted together, their entire lengths. VSS Ground and VSS Signal (yellow and purple wires), must be twisted together, their entire lengths. If you have a tachometer, insert these terminals into the empty \u201cE\u201d cavities, in both connectors. BB BB BB FIND THIS PART, IN BAG B. www.americanautowire.com 856-933-0801 purple yellow 510564 92971174 Rev 0.0 6/18/2015 D C B A Page 15 Green Accessory Connector installation instructions: (female terminal, 10 pcs.) (8-way sealed female connector, 1 pc.) (cable seal, gray, 8 pcs.) (cable seal, blue, 8 pcs.) (cable seal, green, 8 pcs.) (connector cavity plug, green, 8 pcs.) (four different gauges, of coiled wire; 400 inches) (cable seal retainer, 1 pc.) GRAY BLACK Accessories A E B C D H G F 4A 4B 4G 4F4C 4H 4D 4E 4A wiring end of connectorapply supplied decal, to top of fuse box mating end of connector mating face of green accessory connector 4B 4G 4F4C 4H 4D 4E FIND THESE PARTS, IN BAG B. If you plan on using the Battery Outputs (fuse locations F2-F5 ), this Red Accessory wire must be connected; see page"},{"@type":"HowToStep","position":2,"name":"Step 2","text":"If you are not using these outputs, this Red Accessory wire can be removed. www.americanautowire.com 856-933-0801 Pin Location Examples of possible user circuits Circuits are \u201clive\u201d , in these ignition switch positions 4A F4 F5 F7 F8 F9 F6 F3 F2 Optional Battery Feed* Optional Battery Feed* Optional Battery Feed* Optional Battery Feed* Optional Accessory Feed \u201cACC\u201d (Accessory ) \u201cON\u201d / \u201cIGN\u201d / \u201cRUN\u201d All - Radios/CBs - GPS units - Spot Lights - Fuel Pumps/Fuel Pump Relays - Electronic Modules - Fan Relays Optional Ignition Feed - Lights: Courtesy, Underhood, etc. - Electronic Modules/ECU\u2019s - Cigarette Lighters - USB charging outputs Optional Ignition Feed Optional Accessory Feed 4B 4C 4D 4E 4F 4G 4H Output Type Fuse * The Red Accessory wire, in the Gray Input Connector, must be connected, in order to use these circuits. Gray Input Connector 510564 92971174 Rev 0.0 6/18/2015 To remove this Accessory wire, first remove the wire retention clip, from the wire side of the connector... then, facing the mating end of the connector and using a small thin-bladed device, undue the retention tab of the terminal and pull the wire from the connector. retention clip undue terminal retention tab, in this area Page 16 STEP 3: RECONNECT YOUR BATTERY: When you have completed the installation and are ready to reconnect the battery, make sure that the following electrical system grounds are in place: A. Battery is grounded to the ENGINE BLOCK. B. Battery is grounded to the frame. C. Engine block is grounded to the frame. D. Body is grounded to the frame. STEP 4: CHECK ALL ELECTRICAL FUNCTIONS: Any non-functioning items should be checked for proper installation. Any problems with your wiring and electrical circuit functions, should be addressed to American Autowire Systems, Inc. as soon as possible, to avoid any warranty problems. If you have any questions concerning this or any of our products, please feel free to call us at 1-856-933-0801. www.americanautowire.com 856-933-0801 510564 92971174 Rev 0.0 6/18/2015"}]}
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