I posted another thread about the overcharged issue so you can check that out to piece this all together.nowwww I check the air which blows very cold but...all the air comes only thru defrost vent not any other vents does come thru back vents on center console.Also since I saw it overcharges when I rev it.I turn my headlights voltage drops a bit.turn my air on if let it sit voltage drops all the way down and check gauges light comes on.I drove it around the block with air on and it stayed a little under 14 didnt move. What the heck.its gotta be the wiring.but the vents though? How does that happen

 

Do you have any control of where air blows? hot or cold? Pull the hvac controls from the dash and check to make sure the little cable is attached.
Correction the blend door is operated by vacuum and the temperature by the cable, at least on a 96

 

All controls work air blows cold when its set to the ac but all comes out the defrost vent same with the heat theres the main vents then the little one on top on either side the little ones work im guessing there part of the defrotst vents.doesnt blow on the floor nothing all comes out thru tue defrost vent

 

My voltage drops also to 9 check gauges light comes on.turn air off rev enginge gauge shoots up overcharging.last battert leaked from being overcharged.got a new battery same thing.got another new battery and not letting it get to that point since I know.but u cam drive it with the air on and it doesn't over charge.my belt also squeels like crazy

 

Btw this is a 99 xj sport

 

Why does it say 96 Cherokee<<<<<over there?

 

That was what I had I need to update it I just got this 99 sport. But I really wanna solve this hope you guys can help

 

Is this the same rig with the hacked-together alternator wiring from some aftermarket ignition system attempt....? If so...that's your problem that you need to fix which was already indicated in your last thread.

Also, air only coming out of the vents indicates that there is either a vacuum leak, or the reservoir inside the front bumper on the passenger side was removed.

 

Yes I noticed the vacuum canister is In the engine bay now ill check that.and yea its the same rig.I am not sure what to do about the wiring.cant I just get a new wiring harness

 

Would this be what I could use

 

Hey what is this.cause I thought it was the alts wiring harness this is what leads Into whoever spliced Into the wiring when they had msd ignition in it.I would like to pull it out and put a new one in.but not sure which harness it is.its definetly the wiring causing some sort of short.

 

This what harness is that

 

Guess I'll be the one to ask...you said your belt squeals like crazy. Have you verified that your belt is properly tightened, and that all of your pulleys spin correctly, freely, no slop, no seizing, and all in line with each other?

 

I have not yet I am checking for thar actually cause my belt looks just fine. Also my negative came unhooked as I was doing stuff took the battery out to fix these wires no idea where it goes.not the end to the battery the other side

 

Anyone know what this goes too