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Krakkles fucked around with this message at 23:27 on Mar 15, 2022 |
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Mar 26, 2020 01:30
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Yeah, makes sense. Try to jumper it and see if the problem goes away. You can’t de-pin the weatherpack at the alt, so the 12v field current on the other pin will need to come from somewhere else. It would also make sense that the TCM could be freaking out about being fed 19v. Not for sure about that one. If you had it disconnected than the alternator should have been going balls to the wall 19v since it sees no voltage on K72. The PCM would be trying to slow it down by supplying 12v. You had it running or just key on engine off? rdb fucked around with this message at 01:37 on Mar 26, 2020 |
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Mar 26, 2020 01:31
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Krakkles posted:
I might be missing something (plus I don't think it's your issue), but what's that wire-looking thing that looks like it goes under the painted body sheet metal?
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Mar 26, 2020 02:24
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Krakkles fucked around with this message at 23:27 on Mar 15, 2022 |
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Mar 26, 2020 02:48
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All those wires coming off of the positive terminal are fused nearby, right?  With so many accessories, you may want to add a fuse block to tidy it up, but that's something to deal with after the charging fuckery is figured out.
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Mar 26, 2020 12:53
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Krakkles fucked around with this message at 23:27 on Mar 15, 2022 |
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Mar 26, 2020 18:57
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Krakkles fucked around with this message at 23:27 on Mar 15, 2022 |
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Mar 29, 2020 21:44
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Krakkles posted:Digging through this wiring harness has ... not clarified things. That mystery plug, can you pull it apart? It looks almost like a fuse holder or something.
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Mar 29, 2020 22:28
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It looks to me like a Ford-style spout connector you would disconnect when adjusting ignition timing.
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Mar 29, 2020 22:35
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Krakkles fucked around with this message at 23:27 on Mar 15, 2022 |
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Mar 29, 2020 22:43
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Hows it run with that disconnected? Dark green/orange is an alternator wire. Well, wait, the cap doesn’t bridge those pins? E: there is a whole bunch of dust in there. I wonder if they are bridged somehow. rdb fucked around with this message at 22:47 on Mar 29, 2020 |
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Mar 29, 2020 22:45
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Oh hey how have I not noticed this thread before? Sifting through the diagram that looks like it's the connector for an Evap Leak Detection Pump:  If that thing is just a rubber plug and not some noise suppressor like I thought, at least. Wiring colors match up.
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Mar 29, 2020 23:00
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Mar 29, 2020 23:06
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This is the FSM I used for that: https://cdn.xjjeeps.com/pdf/en-us/2000-service-manual.pdf
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Mar 29, 2020 23:36
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I see I've been beaten - but that green-orange wire is just the output from the asd relay, it powers half the stuff in the engine bay. Apparently the ldp is one of those things, I know it runs the injectors, field winding, ignition coil, etc.
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Mar 29, 2020 23:47
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Mar 30, 2020 00:08
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That's likely marked generator sink, if they're following the same terminology. The regulator in the ECU ground side switches it, the other side gets constant 12v from the wire you've identified.
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Mar 30, 2020 03:28
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Mar 30, 2020 04:39
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 02:28
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Wow, that would do it alright. I don’t really drink/smoke much of anything. No worries here, keep your cash.
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Apr 1, 2020 02:37
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Repair the wire first before claiming victory.  Glad you found something though and hope that it fixes it.
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Apr 1, 2020 02:38
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 03:12
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Krakkles posted:Update: HOPE RESTORED.
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Apr 1, 2020 03:20
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 05:00
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Krakkles posted:Looks like this also goes by MIL-W-16878? I'm finding results but nothing on the sites I know (waytek, to be honest). It's great wire. Spendy, but great. Teflon jacket, silver plated conductors, finely stranded, and rated to 260°C. I'll put together a package, I keep all my cutoffs: https://youtu.be/p7jbtIbZKwQ Not sure if I've got 14G, but I'll check. I certainly have 16-26g. You could go all Mil-Spec and do it all in white. 
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Apr 1, 2020 05:47
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 06:30
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Whoa just found this thread. I should really come to SA more often. To honor Sir Krakkles, here he is last month helping me reassemble a new to me 5.3 LS. 
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Apr 1, 2020 07:29
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My suggestion would have been a run to the junkyard with a pair of cable loppers and just gank the entire length of that part of the harness and use that for your wire source but im cheap and wagon wiring harnesses are a terrific source of wire for cheap!
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Apr 1, 2020 14:52
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 15:44
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Krakkles posted:You should! Seconded. Also, this might be one of the most AI images in a while - LS, DSM, and a stack of rackmount servers, all in one shot. Krakkles posted:This is definitely the biggest wiring repair I've tackled so far - I'm basically comfortable with it, but I definitely spent a bit too much time staring into the abyss of that picture last night. In your shoes I would be very tempted to pull the harness out of the Jeep entirely to do the work, given how many splices you have to make. Might not be a time saver overall but could contribute greatly to your sanity.
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Apr 1, 2020 15:52
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Krakkles fucked around with this message at 23:28 on Mar 15, 2022 |
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Apr 1, 2020 15:58
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I wasn't sure if I'd actually mentioned that and was kicking myself for not warning you until you said I had No worries on the alcohol, I barely drink at this point. Donate it to your favorite charity if you feel like you should. I've seen dozens of harnesses fail in that spot BTW - when you do your harness repair, make the section you replace long enough that the splices are in the fixed sections of harness on top of the engine and on the firewall.
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Apr 2, 2020 02:36
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What a hell of a find, I've located a few similar looking culprits and the immediate gratification and confidence that moment inspires is indescribable. Glad you found it. As for credit, anyone could suggest a harness problem - it's kind of catch-all and that was pretty much my only contribution because i got here first if votes matter then charitable donation, absolutely - I tend to lean towards "your local dog rescue/no-kill shelter" as my suggested recipient. I'd also second Ferremit's suggestion of just lopping off that leg of harness and splicing the whole thing in, which will make for one splice per wire instead of two after having spliced in a mismatched wire. I understand your preference to maintain social distance though and applaud your willingness to dive in and tackle it. It may seem slightly daunting, but I'm glad you said you're basically comfortable with it - think of it as just a wire splice, which you've done a million more times - but a bunch of em. Piece of cake. Continuity check as you go if you get antsy about anything.
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Apr 2, 2020 04:16
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Most donors in the junkyard are likely going to have some level of harness abrasion and cracking there, it's just a problematic spot on these Jeeps. Fixing it with mil spec wire is arguably the best route since it's better suited to the environment it'll be in. And making the harness a bit longer there and routing it to minimize flexure from the drivetrain moving on the mounts and rubbing the harness against things will make it live a lot longer.
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Apr 2, 2020 04:32
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Krakkles fucked around with this message at 23:29 on Mar 15, 2022 |
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Apr 2, 2020 05:42
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That amount of abrasion is a bit abnormal, but I normally see them get cracked and broken there. They just jump the harness straight from the firewall to the top of the head with like 6-8 inches to flex and it's a bad idea. The GM "let like 2 feet of harness droop down the driver side of the engine and back up to the fender" plan looks sloppier, but it's likely better for the harness. E: I think the abrasion is because the harness may be misrouted. Every 4.0 XJ I've ever seen has it on the driver's side of the head, that looks like the passenger side. So either I'm picturing this wrong, or you found another problem point I don't know about, or it's misrouted by a previous owner. kastein fucked around with this message at 06:12 on Apr 2, 2020 |
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Apr 2, 2020 06:09
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Krakkles fucked around with this message at 23:29 on Mar 15, 2022 |
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Apr 2, 2020 06:31
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Krakkles posted:In a moment of genius, I donated to my local shelter without checking that they were actually no-kill, because I thought they were. Turns out they're not. I'm searching to find an actual no-kill and will match the donation there, and hopefully this lets this one keep some alive a little longer also. Hopi likes your suggestion: Thank you for this. I like Hopi. 
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Apr 2, 2020 14:15
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Krakkles posted:In a moment of genius, I donated to my local shelter without checking that they were actually no-kill, because I thought they were. Turns out they're not. I'm searching to find an actual no-kill and will match the donation there, and hopefully this lets this one keep some alive a little longer also. Hopi likes your suggestion: Best Friends Animal Society would be an amazing organization to donate to. Their goal by 2025 is to have all of the US as no-kill. https://bestfriends.org/ Also once this quarantine is over, if that ever happens, I need to finally meet Hopi. She's so big!
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Apr 2, 2020 19:06
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Krakkles fucked around with this message at 23:29 on Mar 15, 2022 |
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Apr 6, 2020 16:48
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