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| - | [[Category:Body Electrical System]]The [[Fusible Link]] is a special wire that feeds the [[Fuse Box]]. 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. | + | [[Category:Body Electrical System]]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. |
| = Overview = | = Overview = | ||
Revision as of 22:56, 2 November 2012
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.
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 ... see Wiring#Main Wiring
The white wire here has been cut from the Postive 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 - 20 gauge
- Amazon.com Pico 5557PT 8" Universal 20 Gauge Fusible Link $1.95 USD
- O'Reilly Auto: Dorman Conduct-Tite! 85626
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 ?
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