The fusible link (part number 9098208264, the gray fusible link) has blown twice in my 1997 Land Cruiser. I am looking for help to figure out what could be causing the fusible link to fry. Here is the background:
The truck was running great. However, last week when I was getting on the freeway, the truck suddenly started vibrating and lost power. Thankfully I was able to get the shoulder before it completely died. I got the truck towed back to my house and started troubleshooting (with the help of this forum and a friend). I determined the issue was the fusible link and ordered a couple. I installed the new link, and the truck started. I let it idle for a few minutes, turned it off, then turned it back on to idle for about ten minutes. I then decided to take it for a test drive. It got no further than 40 feet before dying again; I was able to put the truck in neutral and slowly rolled it back in front of my house). The new fusible link was fried (I could smell it).
Now I am trying to figure out what is causing the fusible link to blow? I am guessing it is some electrical short in the system, but I do not know where to start. I am wondering if it is a clue that the truck is fine at idle but fails under load? I read in some forum topics about the oxygen sensors being a possible culprit, but the wiring looks fine to both sensors. I tried looking at the wiring diagram, which I think is correct; see attached. I highlighted in yellow the wires connected to the fusible link (I think it is FL AM2). Should I only be looking in those areas or could the short we somewhere else?
Any suggestions on where to look would be really helpful.
The truck was running great. However, last week when I was getting on the freeway, the truck suddenly started vibrating and lost power. Thankfully I was able to get the shoulder before it completely died. I got the truck towed back to my house and started troubleshooting (with the help of this forum and a friend). I determined the issue was the fusible link and ordered a couple. I installed the new link, and the truck started. I let it idle for a few minutes, turned it off, then turned it back on to idle for about ten minutes. I then decided to take it for a test drive. It got no further than 40 feet before dying again; I was able to put the truck in neutral and slowly rolled it back in front of my house). The new fusible link was fried (I could smell it).
Now I am trying to figure out what is causing the fusible link to blow? I am guessing it is some electrical short in the system, but I do not know where to start. I am wondering if it is a clue that the truck is fine at idle but fails under load? I read in some forum topics about the oxygen sensors being a possible culprit, but the wiring looks fine to both sensors. I tried looking at the wiring diagram, which I think is correct; see attached. I highlighted in yellow the wires connected to the fusible link (I think it is FL AM2). Should I only be looking in those areas or could the short we somewhere else?
Any suggestions on where to look would be really helpful.
Did some research on Mud on blowing the AM2 link and found a post about a guy having the issue because one of the fuel injector wires was shorting out. Figured it was a good place to start. I had to pull the throttle body to get to the wiring, but that was not a big deal. Sure enough, one of the fuel injector wires had rub through it's protective sleeve over the past 20 years and 225,000 miles and was shorting out on a bolt head next to the valve cover. If I remember correctly, it was the #5 cylinder. Taped it all up and zip tied it away from the bolt head, put the truck all back together, replaced the AM2 link again and crossed my fingers as I turned the ignition to ON. Never thought I would be so happy to see the Check Engine light. 
