20 Most Recent 1991 Jeep Wrangler - Page 8 Questions & Answers

If the blower works check for coolant in the cooling system. Test operation of thermostat. Check heater control valve for proper operation if equipped. Pressure test cooling system to ensure system holds pressure (this will help you identify a leak, if any. If car does not over heat and cooling system is in good working order, then the heater core is clogged.
If the blower does not work Check fuse, relay, wiring for short to ground, apply direct battery voltage to blower motor. If blower motor turns on and fuse/relay and wiring are ok replace the switch.

Yes - but it is not very easy. You'll need to run a wire from your positive battery wire to the motor harness under the seat. Some harnesses have a red,blue,or green wire along with a black. Depending on which package your jeep has and which direction you want to move it depends on which wire you need to tap in to. You may also have luck if you remove the seat switch panel from the side of the seat and run your jumper to the corresponding terminal to move the seat. My 93 has bad switches and so I set my seat where I wanted it and unplugged the motor so nobody can move it accidentally.
Hope this helps and please rate my solution!!

There are two phillips screws holding in the bezel. Remove them and pull out the assembly with the wires attached. Twist (or sometimes pull) out the bulb socket from the bezel. Now push down on the bulb and untwist at the same time. Take the bulb to the parts store to match up with a new one, and reverse the process.

Not Available ,on a vehicle that old

The tubing should be good,just replace the rubber
hose part,by the radiator cooler.

Other issues?

The p0304 code is a misfire on cylinder 4 (the last number indicates the cylinder). Check the plug and compare to the others. The plug should be a grey peach colour. Now check the plug lead end socket. There should be no signs of tracking through the insulation to the cylinder head. Check the high tension lead resistances. If lead 4 is much higher resistance than the rest, replace it. Now take a look at the distributor cap, make sure that there are no signs of tracking on the interior or the cap is cracked. Ensure that the contacts and distributor arm are clean and free of build-up. Since the error is specific to one cylinder it is likely that the coil is OK.

when running does the guage on dash read at least 14 volts. it could be a bad battery. when engine is off, there should be at least 12.8 to13 volts at battery. when engine running there should be at least 14 volts at battery. with everything off. if 14 volts is not getting to battery then it may be a bad alternator not charging battery properly. have a good day !! if it is getting proper voltage, then battery is at fault.

Under hood, driver side, lower engine area, front of distributor, mounted in engine block.

It looks looks this;

you could check your catalytic converter it may be clogged

if you still have the heads for the bolts showing,use a "stilson"to undo the bolts then renew them.next time use a ring spanner or a socket.NEVER use an open ended spanner,unless the bolt/nut is LOOSE. (another "trick" is to weld a nut to the head of the bolt.)

maybe you broke the crank sensor upon dismantle/removing.... or adjust the sensor gap.

If the master cylinder and the slave cylinder were replaced, was it because there was leakage there?
Also, are the hoses perfect, or when you press on the pedal is there a visible bulge (may need a friend to look at it or press the pedal for you)?

If the problem is not in the hoses, slave, or master cylinder for the clutch pedal, then it's within the manual transmission. A rebuild of the mechanical clutch parts past the slave cylinder may be required to rectify this situation.


--- BLEEDING THE SYSTEM 1987-93 Models

1. Fill the reservoir with clean brake fluid.
2. Raise and support the vehicle on jackstands.
3. Attach one end of a rubber hose to the concentric bearing bleeder screw and place the other end in a jar, filled halfway with clean brake fluid. Make sure that the hose will stay submerged.
4. Loosen the bleeder screw.
5. Have an assistant press and hold the clutch pedal to the floor. Tighten the bleeder screw with the pedal at the floor. Bubbles will have appeared in the jar when the pedal was depressed.
6. Have your assistant release the pedal, then perform the sequence again, until bubbles no longer appear in the jar.
7. Lower the vehicle and test the clutch.

1994-95 Models The clutch master cylinder, slave cylinder and connecting line are sealed units and are prefilled with fluid at the factory.

Mate.Check the power steering fluid.It usually lets out a scream when it's low.Hope this helps

Did it continue to run fine after those two hours or did it die about 30 minutes afterwards?

Mine was recently doing the same thing. In order to get it to work with the way it was wired, we had to change one of the glass tube fuses that runs the radio. The problem was that the radio and the dash lights were wired together. So if you had the radio and the dash lights on they would both blow. Don't know if this is a common problem though.

With an oil filter(recommended)5.7 litres or 6 qts

Worn spark plugs and /or spark plug wires are the most common cause. Not sure what maintenance was performed, but with the info provided, this would be the first place I would suspect.

there are 4 nuts or bolts its very easy

Sounds like you have a heat transfer problem. First, on a 91, it's likely that the inside of your radiator is partially obstructed with calcium, rust or both. I know that you flushed it but often the flush will go around the obstruction and will only clean the parts that are already flowing (does little good). Rust does not dissolve easily using over the counter flushes and flushing in the vehicle often leaves debris in the tank which will get right back into the core as soon as you start the engine up again. sometimes it can be commercially cleaned, other times you need to just replace it. Air flow can also be impaired...check that the a/c condenser and the face of the radiator between it and the condenser are clean and not packed with bugs, leaves or other debris.

Unfortunately it looks like you have fried your ECU as well. Get the diagnostics done and if it can be read than fine, if not you need to get new one.