The Fusible Link is a special wire that feeds the main wiring harness, the Fuse Box and the Alternator output "A" terminal. If it blows out, all power will be dead even if the battery is fully charged. This wire has fireproof insulation and is designed to act as a special fuse device to protect all the wiring harnesses.
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Overview
The Fusible Link ("Main Fuse") connects to the POS battery terminal about six inches from the battery. The fusible link is a special length of wiring that will melt if its rating is exceeded and is there to stop the electrics if the car is drawing too much power, like an open short circuit. It has a special non-flammable coating, and is typically 4 wire sizes smaller than the main feed wire.
WARNING: Do not replace fusible link with a solid wire, or a regular fuse -- you risk burning up the entire wiring system when a short occurs. The Fusible Link protects against short circuits ... see Wiring#Main Wiring
The white wire here has been cut from the Positive battery cable:
Both green wires are the same. Top: New, Bottom: old and faded
Datsun Fusible Links are color coding (e.g. W, G, R or B). When a replacment is necessary, the color codes must be matched even in an emergency.
This type of circuit protector never produces flame, but but produce considerable heat when it blows. To prevent potential hazard, never bring it into contact with fuel or heater hoses.
Fusible links often show no visible signs of having blown, but can be detected safely by touch.
- 25442-H2500
- replaces 25442-H1100 LINK-FUSIBLE,TYPE C replaced
- part number 25442-H1100 originally for B110
- part number 25442-H2500 for B210 and 620
- Spec: FUL 0.5mm2 [0.5 square mm]
MAD Fusible Link information - why Fusible Link is better than a Fuse
Datsun Fusible Link Colors Pink 30 amp Green 0.50mm˛ 40 amp Red 0.69mm˛ 50 amp Yellow 60 amp Black 1.25mm˛ 80 amp Blue 100 amp
Aftermarket
Use a "FUL 0.5mm2" fuse-link.
- 20 gauge: 0.5 square mm
- 18 gauge: 0.8 square mm *TOO BIG FOR DATSUN 1200*
- 16 gauge: 1.0 square mm *TOO BIG FOR DATSUN 1200*
- 14 gauge: 2.0 square mm *TOO BIG FOR DATSUN 1200*
Universal Fusible Link Wire - 20 gauge
You can use Ford, GM or Chrysler style too:
Datsun 510 & 280Z uses 0.5 as well, but the connectors are different:
- 24022-89905/24022-N4200
Discussion: will this Fusible link suit ?
FMX Modern Replacement
JCASE fuses are designed to be used as replacement fuses for fusible links. FMX fuses are the female standard cartridges that provide both increased time delay and low voltage drop protection.
JCASE uses 6mm blade terminals (1/4" blade will fit) FMX-RP 27mm tall regular profile FMX-LP 16mm tall low profile
NOTE: MCASE fits 2.8mm male blade connectors FMM MCASE 15mm tall micro 10.7 x 7.7mm base
Nissan Triple GREEN Nissan 24370-C991Bᴳ
Nissan Double GREEN Bussmann BP-FMX-40LP-Rᴳ
Bussmann BP-FMX-40-RPᴳ slow-blow chassis fuse * 2000-2013 Nissan 2013 Nissan Armada/Frontier/2012 Nissan Sentra/NV3500 etc. Bussmann/Cooper/Eaton BPFMX40RP ACURA 2000-2007 BUICK 2002-2011 CADILLAC 2003-2011 CHEVROLET 2000-2013 CHRYSLER 2000-2013 DODGE 1998-2013 FORD 1999-2013 GMC 2002-2012 HONDA 2000-2013 HUMMER 2003-2010 HYUNDAI 2003-2013 INFINITI 2000-2013 ISUZU 2000-2008 JAGUAR 2000-2007 JEEP 1999-2013 KIA 2001-2012 LAND ROVER 2002-2013 LEXUS 2000-2010 LINCOLN 1999-2013 MAZDA 2000-2012 MERCEDES-BENZ 2005-2007 MERCURY 2000-2011 MINI 2008-2013 MITSUBISHI 2000-2012 NISSAN 2000-2013 OLDSMOBILE 2002-2004 PLYMOUTH 2000-2001 PONTIAC 2001-2009 RAM 2011-2013 SAAB 2008-2009 SATURN 2003-2010 SCION 2004-2013 SUBARU 2013 SUZUKI 2005-2012 TOYOTA 2000-2013 VOLKSWAGEN 2009-2013 VOLVO 2000-2013
Other Datsun
B210 - same as B110 620 - same as B110
B310 (24161) 24022-W7500 FUSIBLE-LINK WIRE -1179 CAN, FED(EXC KFU) * one green wire 24022-W5900 FUSIBLE-LINK WIRE -1179 CAL, FED(KFU) * two green wires 24022-W5000 FUSIBLE-LINK WIRE 1279- * one red, one green