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Starter Relay-to-Alternator Fusible Link |
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6475 |
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Posted: Sep/22/2017 at 12:11pm |
In looking over my wiring I realize a previous owner has bypassed a bad fusible link with regular wire. This fusible link is 18" long and FSM says it should be 20 gauge (seems small!) copper wire only. Nobody seems to stock anything that length and gauge, so I'm thinking I'll just have to buy some 20 gauge fusible link wire and make my own. Anything special I need to know about the terminals on a fusible link? Should I crimp them or solder them??
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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Cameron, If I remember right the TSM shows an "alternate" wire to use on the Fusible Link to the solenoid......look in your 69 Manual too.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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AMXTSY
Supporter of TheAMCForum Joined: Jul/08/2014 Location: central IL Status: Offline Points: 445 |
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Cam,
Have you tried Blaser's AMC? Steve might have an original link (probably will be expensive). But, might be worth a call. Just a thought... Good luck. Bruce |
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Bruce Carothers
Champaign County, Il. AMO # 9928 |
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6475 |
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Ok, thanks guys. Just realized the fusible link is not 18" long... it's at most 9 or 10" long. I was looking at the wrong wire. That being the case I ought to be able to find something suitable locally.
I'm amazed how much better the '72 FSM is than the '69. It gives lots more detail, i.e. harness routing, shows where the wire clips go under hood and in the trunk, etc.
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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pit crew
Supporter of TheAMCForum Joined: Jul/08/2007 Location: delete Status: Offline Points: 5341 |
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Cam,
One other option, if your not going for a stock look, is to replace it with a fuse. Now a days you can get a fuse in almost and shape or size. Good news is if it ever pops you don't have to dig back in to the harness to splice in a new link. You can even fuse the main battery feed for a trunk mounted battery now. Edited by pit crew - Sep/23/2017 at 7:30am |
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73 Hornet - 401EFI - THM400 - Twin Grip 20 |
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6475 |
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Thanks, Ken. I have considered that. Probably will stick with fusible link for now, but the idea has merit.
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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Lyle
AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
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A fusible link is not just any wire. It has a higher number of conductors and higher thermal insulation so if it does "melt" it is not suppose to leave live conductors exposed (wire melts inside the insulation).
In operation a fusible link can take longer bursts of over current and not fail as can dissipate the heat were a fuse is designed to "blow" at or near design amperage is short order. A 50 AMP breaker may be a another option to replace the fusible link as you can reset it.
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6475 |
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What I find interesting is AMC used 20 gauge fusible link here for what looked like 12-14 awg line. I assume it's because this line was shared with horn relay, which has its own fusible link, but not sure if that would be the reason or not.
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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If you still need a good fusible link, I can part with mine. I haven't removed it yet, since I have modified my harness in other areas, I will be doing a fuse box for charging system, ignition, and relays. $15.00 shipped. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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DaemonForce
AMC Addicted Joined: Jul/05/2012 Location: Olympia, WA Status: Offline Points: 1070 |
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I need to setup something like this to use as a junction block at my starter. I'm perfectly fine with minimal or no fuses in the injection system but the factory dash, trigger controls and gauges need these critical fusible links. The lights will be updated with their own harness updates and junctions so I'm not worried about them. What is the best way to bolt and wire this in? Mount the link base to the firewall near starter and then wire in the multiple links with 12-14awg?
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1971 Javelin SST
American 304 2v | FMX | AM20-3.31 1983 American Limited Jeep 4(.7)L S-MPFI | 1982 NWC T-5M (4.03/.76) | Dana30IFS/35-2.72 |
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