Both blades fail to park.?
are the arms installed correctly?
so the wipers run , when you key on. ? is that it
tell me when exactly they move, and you didnt commend it.
here is how i do this, i log in to alldata.com
and see its a complex set of 5 parts, in the wiper schematic
2 relays (on/off and hi./low) and the wiper motor and the switch
and the controller.
so i take my handy voltmeter ($10 at walfart) and measure
pin 30 of the wiper relay on/off.
if it reads 12vdc (keyon, or off, with wipers off) this is a bad reading
if it reads 0v, , its good. easy huh
but what if the relay 30 pin read 12v
what would i do, id see if its being told to turn on.
id pull it out, is the wiper dead now. (yes, might be bad relay)
but id check the voltage across the 85/86 relay coil pins
12v is bad, the IPM is commanding wipers full time. (keyon)
0v is good, and relay is TOAST>
The IPM is the thing that holds the wiper switch.
it too can fail but i bet not.
SOURCE: 1996 Jeep Grand Cherokee wiper arm
The little blade lock will lift up. see image..."http://econtent.autozone.com:24991/znetrgs/repair_guide_content/en_us/images//0900c152/80/0a/9d/4c//medium/0900c152800a9d4c.gif"
SOURCE: 1999 4.0L Jeep Grand Cherokee shuts down after 20-30 minutes.
I'd suggest the ignition control module, however I'd have a certified mechanic check it out just in case...
SOURCE: 2005 Jeep Grand Cherokee Shifting Problems
Check the Trans fluid level with it running and at operating temperature. Jeep NAG1 transmissions are known to have the input electric seal leak trans fluid. Not an exspensive fix add Mopar ATF4 and then relace the guild seal.
SOURCE: I need instuctions to replace the rear wiper blade
Take it to any parts store and they will do it for you for free, there are three types, the rocker type which you have to raise the wiper arm away from the glass then pull the tab up then slide the wiper down and slide the wiper off the wiper arm. but the best thing is have someone show you how to do it for the first time sometimes they can be tough to get off.
Testimonial: "Thank you for the info it is very helpful."
SOURCE: HOW DO YOU REPLACE REAR WIPER MOTOR ON A 2004 JEEP
This info taken fro a Jeep Forum. Should be helpful if you want to remove and attempt to repair yourself:
Repair Rear Wiper Motor
Tools you'll need:
Some kind of thin metal rod like a wood nail
Small Flathead Screw driver or knife
Crescent Wrench or correct sized box wrench
Socket Wrench
10mm Socket
Multimeter
Optional: Panel puller for the plastic clips on your hatch panel
Optional: 7mm socket for the gear-box
Clean up:
PB Blaster
WD40
Water
Small Wire Brush
Small-er wire brush that can fit inside a small canister.
Shop Vacuum Cleaner
Elbow Grease
Type of Motor: "Permanent Magnet DC Motor" Google it for information on how it works.
Step 1: Removing the motor
Alright, got your tools ready? Good, let's get to work.
First, remove your wiper arm blade. Accomplish this by pulling the arm back from the back hatch until it stops, insert your small object(I used a nail) into the two small holes on the wiper arm to keep it in place. Now take your screwdriver(I used a knife) and look for the spring loaded tab right next to the output shaft from the motor on the hatch(The tab is attached to the arm). Lift it, and pull the wiper arm off.
Got it off? Great. Now take your crescent wrench and remove the thin nut that's threaded around the base of the output shaft. The plastic cap on the outside of the hatch is now only held on by the motor and fluid hose, be wary of this small part falling and hitting you in the head.
Now open up your hatch and prop it up if it doesn't stay up. Carefully remove your rear panel, or in my case, just rip it off because it's barely held on by the plastic tabs anyway. Set it aside, and unplug your motor from the wiring harness. There's a big black connector, you can't miss it, it's on the passenger side of the motor(NOT the driver's side, there's another connector there that's apart of the motor assembly, you don't need to undo that)
Now that the connector is undone, get to work with your 10mm socket and undo the two bolts that are horizontally parallel to each other. There are four bolts total, two horizontal that hold the silver plate onto the hatch, and two vertical that hold the motor to the silver plate. Fiddle with the motor until it comes out, it'll be a pain in your rear because the wiring harness will get in the way, the output shaft wont wanna come out of the hatch, ect, just fiddle with it until it comes out.
You might also wanna make sure to re-connect the window cleaner hose to the little nipple in case you disconnect it while removing the motor.
Step 2: Diagnosing the motor
Good work, you have the motor out now. As I stated before, this is a Permanent Magnet DC Motor, so it's a big cylinder connected to a gearbox with some fancy wiring do-hickeys. You want to take your multi-meter and check the continuity(14-15ω) of all of the wires; there should be about five and a few of them connect into one another..check everything.
Now there's a few things we should talk about to properly diagnose this motor, if you do a little research on the motor, you'll know what I'm talking about. Let's start.
Wires If any one of the wires are broken, you'll need to solder in some repairs. Obviously electricity isn't getting through.
Brushes If the brushes are to blame, then you can swap these out with a new set. This is an extremely common problem with electric motors, it's caused by prolonged use of the motor, or flat out wear and tear. I'm not sure where to get new brushes, but a good hardware store probably sells them.
Internal Coils The motor can be burned out due to seized gears...you have to remove the cylinder to find out for sure. If your motor is burnt out, this will be evident by the coils, they will be black as opposed to brass. If this is the problem, then just toss the motor back in to fill the gap left by the output shaft and get a new one. It's not worth the time or the effort to re-wire the armature unless you really want to.
Permanent Magnets None of the above? Proceed to step three!
Step 3: If you've made it this far...
Okay, so you've determined whether or not the motor electrically works, that means the brushes are good, that means the power is getting to and through the motor, but nothing is happening? Well, if you haven't already, open up the motor!
Take your small flat head screw driver and find the two metal clips holding the big cylinder to the gearbox. They are parallel to each other on opposite sides of the cylinder. You remove them by inserting the screw driver into the slots on the cylinder itself and prying them out; be careful as they will go flying if you use too much force. Now slide off the cylinder and set it aside.
If your motor has been sitting for awhile and you've made it to this point, you'll find out why your motor doesn't work.
It rusted out. Now again, I'm not an expert, but in all of my experiences with rusty magnets, the magnets loose their properties when rust coats their surface. Once removed, the magnetic grasp is restored. When I removed the armature case from the motor, rust literally poured out from the container. Both of the permanent magnets and the electro magnets were rusted to junk and back. Once the rust was removed, and the magnetic properties were restored, the motor worked again. Simple, right?
Step 4: My method of cleaning the rust
Take your PB blaster and spray a decent amount into the cylinder with the two permanent magnets, let that sit for awhile. Take your wire brush and begin brushing off the electromagnets on the armature as best as you can. DO NOT USE PB BLASTER for the armature. I "don't" know if the chemical will remove the insulating lacquer from the coils, but I have a good feeling it will. As you brush, the armature will spin around and be a pain in the rear, but work with it and get as much of that rust off as you can. This is where you use your elbow grease.
As you spin the armature, you'll notice whether or not the output shaft moves as you spin it. If it moves without resistance, then you don't need the 7mm socket to open the gear box. Most likely the gearbox is fine. If it doesn't, your gears may be seized or stripped. Not too much you can do about this without replacement parts. It's all up to you.
Now go back to the cylinder and take your thin metal brush and dip it into that PB blaster you sprayed in, start brushing all that **** out. What will end up happening is the magnets will begin to work again, and attract all of the rust fragments. Doh! Brush your heart out, and then pour some water into the container and swosh it around to get the PB blaster out, rinse it out a few times and then spray your WD40 into the container to get rid of the water. Take your vacuum cleaner and **** out the remaining rust fragments; use a rag to help brush the fragments out to be sucked up by the vacuum.
Cleaned it up? Good, now put it all back together and throw the motor back into the hatch.
Step 5:
Enjoy your rear wiper blade and smile at the fact that you just saved 120$ on a replacement JY motor that might have had the same problem.
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I'm having the same issue. It also affects the rain-sense wipers; when the wipers fail to park correctly the rain-sense function doesn't work. If you turn the rain-sense feature off and use the intermittent setting on the switch they will work normal regardless of if they park correctly. Surprisingly I didn't pull any B DTC's when they failed to park. I also thought it was the switch in the motor going bad and replaced the wiper assembly which did not solve the problem. Figured i'd post this info for anyone else as I continue to troubleshoot.
I have same issue. I changed relays that did not correct issue. Also got a new fuse cover as I thought water might be getting in there. Thanks Matt. I am going to try your suggestion of turning off the rain sense. If I understand you correctly you are saying if it parks incorrectly with rain sense ON the wipers wont wipe anymore. If the wipers park incorrectly with the rain sense OFF, they basically just skip a cycle of wiping and then continue next wipe. I can live with that if that is the case.
I got mine to work properly again (at least for the time being). Remove the battery, disconnect the two plugs going into the FCM (computer between the battery and the fuse blocks). Spray electrical contact cleaner in the plugs and cycle them on/off the FCM a few times to clean the contacts on both ends, let the cleaner dissipate, put some dielectric grease on and plug it back in. My guess is we're getting a bit of corrosion built up, just enough to affect the park switch signal.
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