eaglescout526 Posted October 13, 2019 Share Posted October 13, 2019 18 minutes ago, ComancheFan said: Ok, I don't believe I have a low pressure switch That switch will be on your dryer/receiver. depending on which engine you have the dryer will be by the motor on the 4.0 and attached to the condenser on the 2.5. On 10/12/2019 at 2:16 PM, ComancheFan said: This picture makes me want to cry. That's a nightmare. I thought a lady drowning her new 2019 1500 that she owned for 8 hours was a nightmare, funny but less of a nightmare now. Link to comment Share on other sites More sharing options...
ComancheFan Posted October 13, 2019 Author Share Posted October 13, 2019 Link to comment Share on other sites More sharing options...
eaglescout526 Posted October 13, 2019 Share Posted October 13, 2019 I don't have a 4.0 but number 7 is the cut off/ low pressure switch. Link to comment Share on other sites More sharing options...
Ωhm Posted October 13, 2019 Share Posted October 13, 2019 Click on your username (upper righthand corner). Click on Account Setting. Under Overview, click on Signature. Add your Year and Engine and anything else about your vehicle. Press Save. Link to comment Share on other sites More sharing options...
ComancheFan Posted October 13, 2019 Author Share Posted October 13, 2019 Yeah it's really upsetting. My dad owned the truck for 20 years and had 95% of his work done at a local shop. Everything I try and do on this truck ends up being a endless project. Link to comment Share on other sites More sharing options...
Ωhm Posted October 13, 2019 Share Posted October 13, 2019 Any luck on downloading the Electrical Manual? Link to comment Share on other sites More sharing options...
Warren Mohler Posted October 14, 2019 Share Posted October 14, 2019 this appears to be aftermarket AC Jeep used a block style expansion valve. Nothing the matter with that if installed properly, I have done many. Anyway I assume that AC does work since you said you were repairing Freon leaks. Looking at pics wiring is a mess what I don't see is any evidence of heat at plugs to ac controls no discolored wires with that said I would be taking a close look at that fuse block-terminals. I have seen melted fuses many times and the problem was always right at the fuse Link to comment Share on other sites More sharing options...
AZJeff Posted October 14, 2019 Share Posted October 14, 2019 That wiring is a COMPLETE disaster, and needs to be fixed before you deal with the refrigerant plumbing. Link to comment Share on other sites More sharing options...
Minuit Posted October 14, 2019 Share Posted October 14, 2019 7 hours ago, AZJeff said: That wiring is a COMPLETE disaster, and needs to be fixed before you deal with the refrigerant plumbing. Yeah, agree 100 percent. After studying the pics I think the OP just needs to rip it all out and start with something that hasn't been hacked to high hell and back. No wonder OP is having problems when his harness looks like this. There's no easy way to go about this. You'll need a wiring diagram, basic electrical test equipment and plenty of patience. That is an absolute dumpster fire you're dealing with, and it will drive you crazy and probably burn your truck down if you don't fix it. I'd be seeking out a replacement dash harness at the very least. This should be figure #1 in my upcoming book, "don't mess with things you don't understand" Link to comment Share on other sites More sharing options...
AZJeff Posted October 14, 2019 Share Posted October 14, 2019 3 hours ago, Minuit said: Yeah, agree 100 percent. After studying the pics I think the OP just needs to rip it all out and start with something that hasn't been hacked to high hell and back. No wonder OP is having problems when his harness looks like this. There's no easy way to go about this. You'll need a wiring diagram, basic electrical test equipment and plenty of patience. That is an absolute dumpster fire you're dealing with, and it will drive you crazy and probably burn your truck down if you don't fix it. I'd be seeking out a replacement dash harness at the very least. This should be figure #1 in my upcoming book, "don't mess with things you don't understand" When purchasing old cars, it seems like the general rule of thumb is this: The older the car, the more hacked up the electrical system will be. Previous owners, who in almost all cases do not have a good understanding of low voltage electricity and automotive wiring practices, tend to go crazy with repairs and "improvements" that completely screw up the factory wiring (even as bad as it is on the early XJ's and MJ's). My favorite finds in old cars are the use of twisted and taped connections, follow closely by "wire nuts" intended for residential house wiring to make connections. And if you live in an area that has lots of moisture, "Scotchlock" connectors and unsealed crimp-type butt splices are always fun to find, since they corrode and become intermittent or have high resistance. Link to comment Share on other sites More sharing options...
ComancheFan Posted October 15, 2019 Author Share Posted October 15, 2019 Ok so I called Crystler with my Vin. What they were able to tell me is my jeep had a ac unit installed at the dealer about 6 months after it was purchased in Connecticut. Probably right before the original owner brought it to Florida. I don't imagine this being a common wiring harness to find? Here's what I'm thinking my truck has 315k miles on it and is starting to get tired. There is a 1991 Xj on Facebook with 140k miles for $400 with a slipping transmission. I know it won't be easy but I'm thinking about completely getting rid of the hacked up renix system and using the Xj as a donor. Link to comment Share on other sites More sharing options...
Wounded_Fighter Posted October 16, 2019 Share Posted October 16, 2019 I'm discovering a similar problem on my jeep now... the blower/ac worked fine for a year. Gone all of a sudden. Not warm, not anything. No fan, no ac, on any speed. Got down to the fuse, surprise surprise... the fuse is charred. Odd side note on mine is with and speed set, I can push the fuse in and it will turn on.... I think I have a fuse box demon. I'm going to follow this and go over my ac wiring now too Link to comment Share on other sites More sharing options...
Warren Mohler Posted October 17, 2019 Share Posted October 17, 2019 2 hours ago, Wounded_Fighter said: I'm discovering a similar problem on my jeep now... the blower/ac worked fine for a year. Gone all of a sudden. Not warm, not anything. No fan, no ac, on any speed. Got down to the fuse, surprise surprise... the fuse is charred. Odd side note on mine is with and speed set, I can push the fuse in and it will turn on.... I think I have a fuse box demon. I'm going to follow this and go over my ac wiring now too you say you push on fuse and it works sounds like a bad connection to me, something to try if you know how fuse was oriented in block - darker side up or down, take a male spade connector or narrow feeler gauge of like thickness insert into fuse block terminal to check tension and then compare to a location that is not getting hot I believe you should be able to feel a difference. When my turn signal fuse was melting with the signals on and pushing on fuse I could see arcing on the burnt side of the fuse it was loose connection causing this Link to comment Share on other sites More sharing options...
Wounded_Fighter Posted October 17, 2019 Share Posted October 17, 2019 36 minutes ago, Warren Mohler said: you say you push on fuse and it works sounds like a bad connection to me, something to try if you know how fuse was oriented in block - darker side up or down, take a male spade connector or narrow feeler gauge of like thickness insert into fuse block terminal to check tension and then compare to a location that is not getting hot I believe you should be able to feel a difference. When my turn signal fuse was melting with the signals on and pushing on fuse I could see arcing on the burnt side of the fuse it was loose connection causing this I seen the arcing while pushing on it, but it looked like it was inside the fuse. It didnt break. Looks like I may have to redo some of my fuse panel then... time to hunt down the internal connectors then? Link to comment Share on other sites More sharing options...
Warren Mohler Posted October 17, 2019 Share Posted October 17, 2019 12 minutes ago, Wounded_Fighter said: I seen the arcing while pushing on it, but it looked like it was inside the fuse. It didnt break. Looks like I may have to redo some of my fuse panel then... time to hunt down the internal connectors then? www.repairconnector.com found this elsewhere in this forum Link to comment Share on other sites More sharing options...
AZJeff Posted October 17, 2019 Share Posted October 17, 2019 16 hours ago, Wounded_Fighter said: I seen the arcing while pushing on it, but it looked like it was inside the fuse. It didnt break. Looks like I may have to redo some of my fuse panel then... time to hunt down the internal connectors then? Fuse panel issues in the earlier MJ/XJ vehicles are quite common. It would be wise to inspect/repair/replace ALL of the fuse connectors if you find one or more that are already flakey. You want to avoid a rolling campfire situation. Link to comment Share on other sites More sharing options...
Wounded_Fighter Posted October 19, 2019 Share Posted October 19, 2019 On 10/17/2019 at 1:51 PM, AZJeff said: Fuse panel issues in the earlier MJ/XJ vehicles are quite common. It would be wise to inspect/repair/replace ALL of the fuse connectors if you find one or more that are already flakey. You want to avoid a rolling campfire situation. Just finished replacing all the connectors on it. 2hours lol 5 of the connectors were only half connectors... the corrosion was horrid in there too. Some on the firewall as well as the panel was loose in the firewall itself. Yikes. /Fixed? Testing tomorrow. Link to comment Share on other sites More sharing options...
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