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Jeep Wrangler YJ
YJ General Discussion
Stumped by short to ground
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<blockquote data-quote="machoheadgames" data-source="post: 440752" data-attributes="member: 18789"><p>I forgot about that AC plug. It should be chilling unused up under the dash and probably zip tied to the steering column or somewhere in that vicinity. I talked about it on here ages ago. It has like 6 wires on it and shares blower motor power from the heater blower motor power. totally forgot about that.</p><p></p><p>And what I also forgot to mention is that that circuit goes to a diode that goes to ground, as shown in your clip of the diagram. I still don't understand the point of that but there was a guy who kept shorting that circuit a few years ago and his diode had gone bad. That is probably where your problem is. If not, then the green wire may be shorted to metal somewhere between the fuse panel and the AC connector.</p><p></p><p>For what it's worth, aftermarket AC will typically just hook up to the fuse panel with a power wire and then run its own wiring to the compressor. It won't go through all he factory wiring. So if you decide to add AC, you pretty much won't need that green wire anyways. The only downside to that is the factory method runs the AC activation through the PCM so it can bump the idle for smoother performance. If you do it the aftermarket way then it's sort of a drain on the electrical system and the PCM won't bump the idle or anything to smooth it out because it doesn't realize the AC is on.</p><p></p><p>All that to say the problem is definitely solved for now, and later you may or may not need the green wire depending on A) if you decide to actually add AC and B) if you hook it up the factory way vs aftermarket. I believe the only one selling a factory hookup style is Nostalgic Air Parts. JeepAir from what I have seen has you hook it up to the fuse box only.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 440752, member: 18789"] I forgot about that AC plug. It should be chilling unused up under the dash and probably zip tied to the steering column or somewhere in that vicinity. I talked about it on here ages ago. It has like 6 wires on it and shares blower motor power from the heater blower motor power. totally forgot about that. And what I also forgot to mention is that that circuit goes to a diode that goes to ground, as shown in your clip of the diagram. I still don't understand the point of that but there was a guy who kept shorting that circuit a few years ago and his diode had gone bad. That is probably where your problem is. If not, then the green wire may be shorted to metal somewhere between the fuse panel and the AC connector. For what it's worth, aftermarket AC will typically just hook up to the fuse panel with a power wire and then run its own wiring to the compressor. It won't go through all he factory wiring. So if you decide to add AC, you pretty much won't need that green wire anyways. The only downside to that is the factory method runs the AC activation through the PCM so it can bump the idle for smoother performance. If you do it the aftermarket way then it's sort of a drain on the electrical system and the PCM won't bump the idle or anything to smooth it out because it doesn't realize the AC is on. All that to say the problem is definitely solved for now, and later you may or may not need the green wire depending on A) if you decide to actually add AC and B) if you hook it up the factory way vs aftermarket. I believe the only one selling a factory hookup style is Nostalgic Air Parts. JeepAir from what I have seen has you hook it up to the fuse box only. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Stumped by short to ground
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