Eagle

The XJ and the MJ could be had with several different types of mirrors, including the door-mounted towing package mirrors. And several people here have put the larger side mirrors from the 97+ XJs onto older XJs and MJs.

And where are you going to get red taillight bulbs? That aren't blinding to anyone behind you when you hit the brakes?

Nice attitude? Look at the smart @$$ link that helpful person posted. What do you expect when you put up an EMPTY post, and then less than a day later you complain because nobody responded?

Do NOT try to wire the fan directly to a toggle switch, bypassing the relay. They put a relay in the circuit for a reason. I don't know what the amperage is on the Renix aux fan but on my wife's 2000 XJ it's on a 40-amp fuse -- and we've seen it blow that fuse. If you run it directly off a switch, I hope you own stock in a company that makes toggle switches, because you're going to be buying a lot of them.

The thermal sensor triggers a relay. More than likely the relay is stuck.

Tried it, didn't make a difference. Both the bulb and socket contacts are clean, what else could it be? Bad socket. VERY common problem.

That's because an '86 is an AMC. Chrysler didn't start picking up VIN numbers until the 1988 model year, IIRC, and often the information reflected in a Chrysler-generated build sheet for an '88 didn't even remotely correspond to the vehicle. However, Chrysler bought AMC, so Chrysler bought the recall liability.

Just noticed I had that backwards. The thermostat is open while the temperature drops. It would be staying open too long before closing.

Loss of power is often caused by a clogged catalytic converter. Do you have converters in Mexico?

The pitman arm can only go onto the output shaft of the new box one way. No alignment should be necessary.

Why are you using any wires from the Sun tach installation? The wiring for the factory tach is already there, it's plug-n-play.

Check your hard lines, especially over the gas tank, and check your rear height sensing valve. It was a panic stop just such as you describe that exploded the height sensing valve in my '88 MJ. The result is that you get a low pedal because the rear circuit is blown and you are now stopping entirely with the fronts.

It sounds to me like you have a lazy thermostat. The operating temperature doesn't stay constant -- the thermostat constantly cycles open and closed. The purpose of the thermostat is to keep the temperature UP, so if the cooling system is working, the temperature will get up to the setting for the t-stat, the t-stat will open, and the temperature will then drop to the point at which the t-stat closes again. Then the temperature goes back up until the t-stat opens. Rinse and repeat. The normal range, IIRC, is only about 15 degrees or so and most people don't notice that amount of change on the temperature gauge. Your thermostat may be allowing the temperature to drop too far before it reopens.

Yes.

You have a vacuum leak. The vent flapper doors are operated by vacuum. By design, the default when there's no vacuum is for the doors to direct airflow to the dash-top defroster outlets.

I agree -- this is just an ABS system, not a traction management system. And, as much as I generally dislike ABS, I think it makes moire sense for a pick-up truck than the failure-prone height-sensing rear proportioning valve used in the MJs. And IMHO the XJ's proportioning valve is even worse -- what you want is something that prevents rear wheel lockup in a panic stop. What the XJ "proportioning valve" does is exactly the opposite -- it prevents the rear brakes from working UNTIL you're in a panic situation and really stomp on the brakes. My wife's 2000 XJ has 105,000 miles on it. We're well into the second set of front brake pads. I just changed the rear brakes a couple of weeks ago, but the problem was a rusted line and loss of pressure. I changed out the wheel cylinders and shoes while I was working on the brakes, but after 104,000 miles the rear shoes were less than 50 percent worn. There's only one way that can happen -- they aren't doing anything. Why? That stupid proportioning valve.

Why would you need to reprogram anything? You would need to use the XJ axles, in order to get the tone rings, but the system works by sensing when the wheels stop turning. Why would it matter if the wheels are under an XJ or MJ chassis?

I found this one before I could find the procedure I copied from the FSM. http://comancheclub.com/topic/40428-brake-bleeding/

What year Cherokee? I think Jeep changed the maker of the ABS system somewhere in there.

Dunno. Did the Comanche ever come with ABS as an option?

Then you did NOT follow the factory-required bleeding procedure, and there is probably air trapped in the bypass line for the rear brakes. I've posted the procedure, quoted verbatim from the FSM, on this forum previously. Try that and see if it helps.

Sounds great in theory, but the fact is -- the a/c DOES cycle when wnen it's cold. I don't know which of the two reasons being discussed is the reason the system was designed this way, or if both reasons apply. The point is -- the OP asked why his system was malfunctioning, and the answer is that his system is functioning as designed. If y'all want to argue about why the engineers made it that way, have at it. From the 1988 MJ FSM:

There is no need to do this "a few times." The system operates under positive pressure. Turn on the key, let the pump run until it shuts off, then start the engine. Same thing you should be doing every time you start it.

Does your MJ still have the rear height-sensing proportioning valve, with two steel lines running from the front distribution block (just under the master cylinder) to the rear of the vehicle? If so, after doing all the brake parts replacements, did you follow the factory procedure for bleeding the safety bypass hydraulic circuit to the rear axle?

I remember reading that, too -- several times. And then I remember someone posting that the S-10 handle doesn't work. I wish someone knew for sure. (And, of course, it may depend on which year S-10.)