1993 4RUNNER keeps blowing 10 amp AC Fuse
Jan 20, 2017 | 08:20 PM
#61
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From: Arkansas
If that wire is connected to the front heater relay then I think you may be right. It looks like the most common wire between the heater and ac circuit. I can see where a failure of that relay could backfeed a bunch of juice through that ground wire back into the ac amp.
Jan 20, 2017 | 08:21 PM
#62
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From: Galveston, TX
It is my only means of transportation, trust me, no fuse will go back in until all tests are done. I know putting a fuse in, not only may blow the fuse, but heating the source of the short. I think following the obvious burned wire, and replacing, then the tests are the best solution, am I right? I'd like to take it to a electrical shop however I'm on ssi with only $733 a month so cant afford to. I have to continue driving it because of many dr. appts. but rest assured, no more fuses until I at least know this ground isn't shorted in the loom somewhere.
Jan 20, 2017 | 08:31 PM
#65
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From: Galveston, TX
I also still haven't been able to pull out ac amplifier, The case is part of the heater/ac case, no screws or anything, it slides upward and hits a bolt holding some plate on dash, I need a deep well 10mm socket then remove 2 screws to get plate off, then I HOPE it will slide out!
Jan 20, 2017 | 08:36 PM
#67
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From: Galveston, TX
What really puzzles me, is if the burned ground is touching a positive lead to something else in the harness, why is just the ac fuse blowing? Absolutely EVERYTHING electrically works other than this situation.....
Jan 20, 2017 | 08:43 PM
#68
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From: Galveston, TX
My theory is that the amplifier board shorted, (shorted diode or transistor), it blew the 10 amp fuse, and whoever owned it then started putting larger fuses in hoping to get it going again and that's what melted the neg wire from relay up.Now its so burned and it melted through another wire in loom. This will be hard for me as I've had both hips replaced in last year and a half and have back problems so Ill fill all you in as I can. Thank you for all the advise.
Jan 20, 2017 | 08:59 PM
#69
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From: Galveston, TX
Do NOT put that AC fuse back in untill you run these tests. It's best to run those tests while the dash is still apart. We have already established once above you have a serious fire risk and that the blue wire is flowing around loose and exposed inside the dash somewhere. The tests above are to isolate it to a section of the dash loom you need to cut open and visually inspect for OTHERS that are damaged.
You shouldn't even have hooked the battery back up untill and unless instructed to. Like I said above you aren't just risking danger to you but first responders, people around you, and MY loved ones.
i was being dramatic before when I said the "my loved ones" but now I'm pissed you didn't listen because my brother his wife and children live IN Galveston!!! And she is an EMT!
You shouldn't even have hooked the battery back up untill and unless instructed to. Like I said above you aren't just risking danger to you but first responders, people around you, and MY loved ones.
i was being dramatic before when I said the "my loved ones" but now I'm pissed you didn't listen because my brother his wife and children live IN Galveston!!! And she is an EMT!
Jan 20, 2017 | 09:42 PM
#70
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From: Arkansas
Co 94 has given you the right advice half a dozen times. You're on this forum to get advice from folks that live and breath this stuff and enjoy troubleshooting problems with other members. If you want to go your own way, that's 100% fine, and you may know better than we do, but don't get us all involved and up half the night staring at a wiring diagram and then not entertain the though that the provider of all this information might actually be right. I'm out too.
My last resolution to your issue is, remove ac fuse, depress window down switch.
My last resolution to your issue is, remove ac fuse, depress window down switch.
Jan 20, 2017 | 09:58 PM
#71
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From: Galveston, TX
I know you are all better than I am, no doubt. I'm only saying that I want to follow the burnt wire and make sure its not shorting something else and replacing it. Then doing the trouble shooting. Troubleshooting before fixing an obvious situation does not seem correct. I need to fix what I see is obvious an then appreciate and follow the steps you have all given. Following your steps firsts can give me false readings if performed before an obvious problem.
Jan 24, 2017 | 10:46 AM
#75
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From: Galveston, TX
I have been very sick and offline the last few days so haven't been able to post. My apologies for insisting on trouble shooting the ground first, In the next few days I will go over all the tests you've given to me and will post the results when completed. I hope you will continue to work with me on this.
Jan 24, 2017 | 06:29 PM
#76
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From: Arkansas
Troubleshoot your burned wire. I think you are going to need to get past that before you can open your mind back up to testing. Just a little advice. If you think you need to do something like fixing that wire, just do it. No need to hold up the flow of ideas that members are racking their brains to provide. I felt bad for getting on you the other night after finding myself in a similar argument with my mechanic at work. We both wend down different paths for a while on a troubleshoot but were back on the same page after we both individually did the tests we thought should have been done first. Neither of us were right, by the way.
Fix your wire, do some of the suggested tests and report back.
Fix your wire, do some of the suggested tests and report back.
Jan 25, 2017 | 10:46 PM
#77
Any updates, are you doing ok, feeling better?
I have been very sick and offline the last few days so haven't been able to post. My apologies for insisting on trouble shooting the ground first, In the next few days I will go over all the tests you've given to me and will post the results when completed. I hope you will continue to work with me on this.
It wasn't trouble shooting the ground I have any issues with, the tests above relate to that directly I just wanted to go a section at a time to avoid confusion and keep it simple to follow.
My concerns were that we might find more burned sections and you could replace a larger section of the ground wire all at once instead of several small patches. And that we could alter some of the resistance checks. Or worse damage the new wires from missing a bad section and have to do the work twice.
Jan 29, 2017 | 03:44 AM
#78
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From: Galveston, TX
I understand better now. However, I haven't done anything yet. So sick and dr. appts and the weather all keep me from doing anything. Thank you for understanding. I will post your test answers asap. it may be a few days or longer, But will follow your instructions.Dash is of course still tore down so I'm ready when everything falls into place! Thank you and you will hear back soon.
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