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Old 08-20-2019, 11:41 PM
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94 rear wiper motor

Onto the next issue. When I press the rear window wiper switch, I just hear a clunk (kinda like a starter solenoid sounds when the starter quits) each time I press the wiper switch. Does it sound like the motor is cooked? It looks really clean but that don't always mean anything, right?! Also, the wiper arm was missing when I got this Sahara so maybe it hasn't been working for some time. This is a picture of the motor and, I believe, the original part number. But couldn't find it anywhere on the web.if the motor is done, does anyone know where I can find one? And an arm? I'm also not sure as to whether this top is original or stock to the '94 as I found that the wires to the motor were a little different in connection location and were different colors on the jackets vs the service manual wiring diagram. Thanks for any info.



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Old 08-21-2019, 08:04 AM   #2
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Same problem I had...
I removed the motor and took it apart then lube it, it was just frozen stuck from lack of use.
It works fine now

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Old 08-21-2019, 11:06 AM
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Same problem I had...
I removed the motor and took it apart then lube it, it was just frozen stuck from lack of use.
It works fine now

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Hey, not sure if I have the correct switch in my dash for operating the motor and rear window washer pump. This could be the source of some of my other problems (like the rear window washer doesn't work when I activate the switch). My switch is located on the ip, along with my fog lamp switch and rear defog switch, and is the one most to the right in reference to the other two. It also just has the word "OFF" on the lower part of it's face and when you press the bottom of the switch it stays in place and activates the rear wiper motor, but when I press the upper front part of the switch, it rocks and doesn't stay in place (like how the rear defog switch feels) and nothing happens. It looks like, from the service manual, that the rear wiper motor switch has 2 symbols of a rectangular window (one with a spray of fluid and wiper arm, sort of, symbol and the other, a window symbol with wiper arm but without the spray symbol). Does it seem like a previous owner put in a different/incorrect switch at some point here? Thanks.
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Old 08-21-2019, 02:06 PM   #4
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When you press the upper part of the switch, I believe that activates the washer. If you activate the lower part of the switch, I believe that activates the wiper.
Do you have two washer pumps on your reservoir? If you have only one, that's why your rear washer doesn't work.

In order to test the wiper connection, turn your ignition on and turn the wiper on (press the lower part of the switch in question).
Then unplug the hard top connector that's inside the tub. Use your test light to see if you have power to any of the wires. One wire will be for the cargo light. Make sure that your doors are closed and the rheostat on the dash is turned off. (If your interior lights are connected and working, make sure they're off).

If you have power at the tub side of the plug, make sure that the topper ground is grounded. Use a jumper to do this. Then use another jumper to connect the wire with power to any one of the wires in the topper side plug except the black wire. The black wire should be ground. Connecting to the ground wire with your jumper to ground will pop a fuse.
If by jumping power to any of the wires the wiper motor works, simply buy a wiper arm and blade. You may have to buy a nut if you don't have one and if your wiper motor shaft requires a nut. Some require a nut and some use a different way to attach the wiper arm. Take the Jeep to your local auto parts store when you go to buy a wiper arm & blede so that you're sure to get the correct size and fitment.
If you can't get the wiper motor to actuate with power to it and a good ground, I suggest that you do as Rubisean1 did and disassemble the motor and clean & lube it with dielectric grease.

Let us know if you get it fixed or post with more questions.

Good Luck, L.M.
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Old 08-22-2019, 12:23 PM
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I believe the motor is getting power as when I provide 12V to it, I hear like a solenoid clicking in the motor. Like it wants to move but can't. It looks so clean from the outside, though, when I removed the motor cover, that I wouldn't think it needs to be disassembled and lubed, but that just might be what it needs to free it up, if it's frozen. Just a quick look, it looks like a sealed unit. Is it easy enough to disassemble to get into it for cleaning and lubing? I should probably just take it off and try to connect it directly to the battery and see if it moves before I do anything else. Oddly, though, the wire colors on the connector differ from the ones in the schematic for a 94 so I'm wondering if my hardtop is not original to the Sahara. The "A" position of the connector appears to be the one in the schematic that should provide power to the motor but the voltage is coming from the "C" connector location. My A connector wire is blue & black where the manual shows it should be brown & pink and the C connector wire is orange & black whereas the schematic shows it should be brown & light green (or gray). If this is a different hardtop (not a 94), and the wiring is different , as such, would the motors be different from year to year and/or the wiring/power feed to the motor? I just don't know enough yet about all these connections, wiring, etc. Thanks.



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Old 08-22-2019, 02:05 PM
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Hey, not sure if I have the correct switch in my dash for operating the motor and rear window washer pump. This could be the source of some of my other problems (like the rear window washer doesn't work when I activate the switch). My switch is located on the ip, along with my fog lamp switch and rear defog switch, and is the one most to the right in reference to the other two. It also just has the word "OFF" on the lower part of it's face and when you press the bottom of the switch it stays in place and activates the rear wiper motor, but when I press the upper front part of the switch, it rocks and doesn't stay in place (like how the rear defog switch feels) and nothing happens. It looks like, from the service manual, that the rear wiper motor switch has 2 symbols of a rectangular window (one with a spray of fluid and wiper arm, sort of, symbol and the other, a window symbol with wiper arm but without the spray symbol). Does it seem like a previous owner put in a different/incorrect switch at some point here? Thanks.
Should this be the correct switch (in the diagram on the right?)?



This is what's in my dash

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Old 08-28-2019, 10:02 PM
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I was just thinking and wanted to ask if anyone knows, is it possible that I have an aftermarket top, wiring, and wiper motor here? didn't factory hardtops have the rear wiper motor mounted on/through the rear glass? If this is aftermarket, thatr might explain why my wiring jacket colors differ from what the service manual diagram says they should be.



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Old 09-01-2019, 10:04 PM
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Well the mystery to all the top problems I've been experiencing has been solved. I called my Chrysler dealer to ask about the part number on my rear wiper motor. I was told that the original part number was superseded to a newer number. Looking on Crown's website for that number showed that it belonged to a 1990 YJ. So I got the idea to check the 1990 service manual wiring diagram for the rear wiper/washer circuit and, lo and behold, I discovered the wiring in my top matched the schematic (not '94 like my YJ).
So I have a 1990 hardtop on my 1994 Sahara. And, doesn't it figure, the only circuit that functions as such, is the rear dome light! The wiper, washer, and rear defog are all very differently wired in the '90 top and the '90 wiring even has different rear defog and wiper/washer switches! So I think I'm out of luck in getting anything to work (easily) back there. I guess I'll be looking for a '94 hardtop with rear defog and wiper for sale somewhere or a swap for my '90 top with same. I'll be using Rain X in the meantime.
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Old 09-02-2019, 03:43 PM   #9
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It is not difficult to make harness, I made one that looks factory.


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Old 09-02-2019, 05:31 PM
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My 90 top has a different wiper motor than what the 94 would be. Did you have to deal with that as well? The wiring for the 90 motor is a bit different than the 94 as per the factory schematic. And I don't think a 94 motor would fit into a 90 top. I'm thinking they're mounted differently and are of different configurations. And I'm not sure where to find one either. I don't know, also, but it would appear I would only need to remake a wiring harness to match a 94 harness then swap out the current harness in my top. Would that be right? Thanks.
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Old 09-03-2019, 09:15 PM
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It is not difficult to make harness, I made one that looks factory.


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I'm thinking I may do same. I think I would just need to recreate a '94 wiring harness and connectors for my '90 top and just remove and replace the '90 harness with my made-up '94. I think it would work. I'm just unsure as to whether the rear wiper motor internal circuitry of my '90 top would function properly connected to the '94 wiring circuit. I'm not really sure from looking at the wiring diagram if it would. Any thoughts on that? Where did you find the parts that you needed to create the harness to make yours look like factory? Thanks for any help in trying to finish this up. I feel like I can see the light at the end finally and maybe have a good direction to follow.
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Old 09-03-2019, 09:35 PM   #12
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I'm thinking I may do same. I think I would just need to recreate a '94 wiring harness and connectors for my '90 top and just remove and replace the '90 harness with my made-up '94. I think it would work. I'm just unsure as to whether the rear wiper motor internal circuitry of my '90 top would function properly connected to the '94 wiring circuit. I'm not really sure from looking at the wiring diagram if it would. Any thoughts on that? Where did you find the parts that you needed to create the harness to make yours look like factory? Thanks for any help in trying to finish this up. I feel like I can see the light at the end finally and maybe have a good direction to follow.
I used the Male and female weather pack plug connector from the cooling fan assemble from a totaled car.
I then used a power supply and a multi meter to figure out what wires did what in the hard top.
Once I figured that out I soldered the female portion of the donor weather pack connector to those hard top wires.
Then it was just a matter of running the wires through a braided loom and heat shrinking everything together.

You will have to make the electrical connections under the dash and to the switches.

Now when I said I made the harness look factory, it does to the layman but if you know what you are looking for you can tell it was added on..

Anyway it took me about 6 hours to figure it all out and make it.

Relax, you can do this.
I could take a pic of the connection if that would help you understand.

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Old 09-03-2019, 10:31 PM
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That would be helpful yes. It could definitely make it clearer for me what you did exactly and what I'd need to do to reproduce something similar. I will be looking at redoing the '90 in-top wiring as a second option too to see which might be more doable for me. The more I look at the 2 wiring diagrams ('94 vs '90), I can't help but think "Can it be as simple as maybe moving the few specific wires around on the in-top connector (cut and splice) to match up with the wiring coming in from the 94 left rear (to-top) body connector"? I think I can connect up some jumpers, to what should be the matching location for each specific needing-to-be re-positioned wire, between the 2 separated top connectors. Any thoughts on that?

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