The actuator failure occurs due to faulty design. Apparently replacement actuators are no better than the originals as they continue to fail. I did this to my Odyssey several years ago after both rear window actuators failed within months of each other. I have not had a single failure since applying this fix.

    • Download attached PDF.

    Could not get the step-by-step info to download ???

    Bob - 回复

    Look under the FILES tab on the left side of the page. You can download the document from that location.

    Marvin -

    hi,i did what you write only one of the wire i faild to solder it to ptc thermstor,and the window work and the light not illuminate?i used the bulb 194ll and it's socket

    maher - 回复

    If you followed the instructions in the PDF document, you would have 2 not one wire soldered across the PTC Thermistor. You must have one wire soldered across each side of the Thermistor for this fix to work. Do not solder both wires to the same side of the Thermistor. The lamp must be wired in parallel with the Thermistor. As shown in the photos, the Thermistor has two gold/brass colored leads. One lead is connected to the actuator motor and the other lead is part of the plug on the actuator. If you are unsure of what you are doing you should get help from someone that has experience electrical or electronics experience and can solder small electronic parts.

    Marvin -

    yes, i solderd each wire on each bar,one on the lober bar and the other on the upper bar,and the motor open the window but the lamp still not illuminate .

    how can i upload the picture so you can look if my work is ok or not?

    thank you

    maher - 回复

    The lamp will only light very dimly during normal operation. If you stall out the actuator the lamp will light brighter. If you are watching the lamp at the instant power is applied it may also light brighter and then dim down as the motor comes up to speed. The easiest way to test these actuators out of the vehicle is by using a 12V gel cell battery and a pair of Radio Shack clip leads. You simply reverse polarity of the clip leads to change the direction the actuator runs.

    Marvin -

    thank you , i will do that and i will let you know

    thank you again

    maher - 回复

    THANK YOU Marvin you are genius it work now without the socket,so I think with socket it work also but with out illuminate the light

    any how you have the favor

    maher - 回复

    what will happen if i connect the motor direct with out the ptc thermistor?

    maher - 回复

    Did you read the pdf document in its entirety? The purpose of the PTC Thermistor and what can happen without it is explained in the very first paragraph. The lamps replace the function of the thermistor. Do not attempt to use the actuators without this current limiting protection unless you want to risk a vehicle fire!

    Marvin -

    Instead of a small bulb you could use one or more resistors to give you 50 Ohm resistance with a minimum 5 watt rating at 14 Volts.

    It would work the same way as the posted solution because the "fix" works by bleeding off some of the power that otherwise goes into heating the PTC in a motor stall condition. It would be easier to solder a resistor compared to a bulb and probably cheaper too.

    The only bad part of using a resistor would be you wouldn't have a visual check to see if you wired it correctly. You would have to feel if it got hot when power is applied with the motor stalled.

    Trevor - 回复

    The only issue I have with the posted solution is the un-likely event of the switch being continuously actuated for a long period of time. The bulb will dissipate the energy in light and heat, but since the procedure asks to shrink wrap it the light energy gets absorbed by the shrink-wrap and turned into heat (and degrades the shrink-wrap). This could cause a fire. If high quality shrink wrap is used, the bulb may burn out quickly and the original condition would present itself again. (during normal usage this would never be a problem)

    A resistor would be easier to wire without all the shrink-wrap and therefore less chance of a fire as resistors are designed to dissipate energy at their rated capacity.

    Trevor - 回复

    Instead getting and wiring two bulbs you could get the following. A two pack wire-wound resistor at radioshack for $2.50. That would be enough to fix both windows.


    Trevor - 回复

    By the way, the root cause of the issue is not the PTC. The root cause of the issue is high load on the actuator motor. This is most likely from dirty, old, and/or frozen window seals.


    The posted procedure is very well documented and I love the detail you gave. I'm an engineer and have encountered a similar issue on the Ford Expedition 3rd Row Power seats. I'm going to try this type of "fix" on that issue to help that PTC cool faster.

    May I suggest you add something to your posted procedure for this though? Just a quick note at the beginning something to the effect of:

    "Before opening your trim panels, try applying silicone grease to as much of the window seal as you can and clean the mating surface of the glass. Re-test to see if the windows now function more normally. Do not hold the buttons down for more than 5 seconds if the window doesn't open."

    Trevor - 回复

    Trevor; The root cause of the failure IS the PTC. Dirty, sticking seals etc may help accelerate the process but ultimately the PTC is not up to the task over the long haul. As an electrical engineer for over 40 years I am very familiar with the failure modes of PTC's. One of the problems with these devices is their notorious instability with repeated heating cycles, especially when they get really warm as they will in this application. They have a tendency to increase their resistance. I explained this in the pdf document. You also talk about using a resistor. There is a reason I and the manufacturer did not do this (I also explained that in the pdf). A PTC resistor (a lamp or an actual PTC resistor) exhibits a low resistance when cold and a high resistance when hot. The low cold resistance allows for a high inrush current to start the motor and the high resistance prevents a motor burnout if the motor is stalled.

    Marvin -

    Due to the motor resistance, the lamp never gets bright/hot enough to ever cause a fire from the heat shrink tubing even if the motor was stalled until you ran the car battery down! Heat shrink takes a very high temperature to actually burn and is very flame resistant. (Check the UL listings for that material, that is why I used it.)

    Marvin -

    If you used a fixed resistance that was low enough to start the motor and provide enough torque, it would be so low it may not protect the motor in a stalled condition. That is the reason for a PTC or a lamp. LOW resistance cold, HIGH resistance hot. Lamps and heater coils have been used for current limiting for many years. Their use goes all the way back to vacuum tube equipment. (They called them ballast resistors.)

    Marvin -

    The resistor I'd selected was something available from radio-shack that would have similar characteristics to the lamp you'd selected. I was thinking you wired the lamp up in parallel to the PTC. If instead you bypassed it, I've mis-understood your fix. I was thinking the PTC would still pass the current for most uses if the mechanism and the seals were refurbished and working well. Isn't it true that the resistor (of whatever type) would then dissipate some of the energy while allowing some power to flow to the motor.

    I was not thinking the PTC would be so degraded that it wouldn't even be able to handle the initial inrush current. If that's true then that would explain why my windows won't open even when the mechanism is getting manual assistance.

    So should I just get new actuators and upgrade them with this fix before installing?

    Trevor - 回复

    Trevor, once again again, a resistor from Radio Shack or anywhere else will not behave like a PTC! A resistor maintains a FIXED resistance. A PTC, like a lamp, varies resistance with temperature! As the motor load increases toward a stall, the lamp brightness increases, resistance increases and this limits the current to prevent possible motor burnout or fire. The PTC in these actuators fails by increasing resistance to the point the actuator motor will not run under load. I did parallel the PTC and that does effectively bypass it because the PTC resistance increased to the point that it would not run the actuator. I paralleled the PTC because it provided the necessary electrical connections to the motor and the wiring harness. It will pass some current but for all practical purposes it only serves as a mechanical termination point for the lamp. The PDF document I wrote explains most of this in detail.

    Marvin -

    What is the purpose of the PTC? I'm asking, because the PTC on my Honda disintegrated while I was soldering the new leads to it.

    Can it be bypassed? Just direct-wiring to the leads coming from the front switch?

    eric - 回复

    Eric, please read the above response to Trevor. I explained all of this in the original document and again in the response to Trevor. To destroy this during soldering you must have been using way too much heat or you were heating it far too long. Electrically you don't need it but it does make wiring easier if it remains intact. I guess you could solder the wires to the gold PTC tabs and then epoxy the PTC back together. This will restore the ability to use the motor and the wiring harness plugs after you complete the modification.

    Marvin -

    Eric, please read the above response to Trevor. I explained all of this in the original document and again in the response to Trevor. To destroy this during soldering you must have been using way too much heat or you were heating it far too long. Electrically you don't need it but it does make wiring easier if it remains intact. I guess you could solder the wires to the gold PTC tabs and then epoxy the PTC back together. This will restore the ability to use the motor and the wiring harness plugs after you complete the modification. Just make certain that the two gold PTC tabs are not shorted after they are glued.

    Marvin -

    Any success, Eric? My PTC fall apart too. Where I can get new one? Anyone knows? Thank you!

    odekolon -

    Hi Marvin, Thanks for this fix. Much better I think than another that simply said squeeze out the PTC to reduce the resistance and trim off the excess. My question - I can't seem to get the PTC connector out of the plastic plug body. I tried pushing it throu from the connector blade side with no luck. Any suggestions? Thanks again.

    Paul Altpeter - 回复

    Paul, the brass connectors have little tabs on them that hold them in place in the plastic housing. You may need to use needle nosed pliers to squeeze these tabs in while pushing the connectors out of the plastic housing. It may take a bit of force to push the connectors out of the housing but go slow and work them out a bit at a time to prevent breaking anything.

    Marvin -

    Hi Marvin. Thanks for the prompt reply. I'll give it a try and post here how it works out.

    Paul Altpeter -

    The instructions were excellent! I was able to successfully modify my actuators and get them working again. However, I recommend using the 168 LL (14v 4.9w) bulbs instead of the 194 LL (14v 3.8w) bulbs . As mention in the instructions: "If you can get a different 12volt (Note: I think this is a typo - spec shows this to be a 14v bulb) bulb with a slightly higher wattage rating that will accept solder....". The higher wattage rating will allow the actuators to operate at close to normal speed. Also, if you use a small screwdriver or blade and scrape the end-leads of the bulb (GO SLOW - this takes patience) you will scrape away enough of the coating to expose the copper and will be able to solder the wires right to the bulb. Hope this helps! - MC

    Machah - 回复


To reassemble your device, follow these instructions in reverse order.





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Down load didn't work...I would really like to have the answer to this question. PDF does not provide any information...if there are links inside the PDF they don't work either. The key question is how do you remove the panel that covers the Honda Odyssey Rear window actuator?....on a 2002 to be specific?

KHM - 回复

Worked great!! I only broke 1 clip getting the panels off. That meant I paid the dealer about $1.50 instead of the $300 they wanted to fix it.

Grunt - 回复

This mod is done to new/working actuators, correct? Not ones that have already failed.

gradh - 回复

The mod can be done to failed or non-failed actuators. The part that fails is bypassed. It was primarily developed to repair failed actuators.

Marvin - 回复

Thank you so much Marvin, you are a genius! I have been looking for a fix since i bought my van a couple of years ago. I found your link last friday and I fixed them on saturday. they work great. So many people have been ripped off because of this. Mine work like a champ. I bought 2 light sockets for the bulbs you recommended and soldered them in so if they quit again i can just change the bulbs.

I cant thank you enough for sharing your idea.


Roger Jones - 回复

Man, I have not tried it yet; but from the instructions it looks like it will work.

There is just one word for the author of this: "ExtraordinarySuperSmartGiftGivingGenius"

Thank you very much

Koki - 回复

Both my windows seemed to fail at the same time. I hear clicking when switches are activated and sometime windows will open slightly. I have skills to apply the fix but have no idea where the actuators locate or how to access them. Can anyone point me in the right direction. Preston 20120912

Preston - 回复

The actuators are behind the plastic side panels located underneath the windows. These side panels are held in place with snaps, clips and screws. Take your time and go slow until you find all the clips and screws. If you get in a hurry or force parts they may break. Replacement clips and snaps are dealer only parts and are thus expensive to replace.

Marvin -

Many thanks. I ended up drilling small holes in the metal tabs to ge good contact for the wires. It worked great.

Jay - 回复

This solution worked perfectly, both sides fixed. I am still in awe how relatively easy this was to implement. I left a little of the end of each bulb exposed in the shrink tubing just to see the element light up as the motor travelled to the end of its open/closed ranges.

Thank you, thank you, thank you.

Dave - 回复

Worked like a charm at little cost. The only thing I dislike about these projects is the panel removal to access the motors. Seems like no matter how careful you are during removal, they are a bear to get back in place exactly the way they came out.

wdreeves - 回复

Just fixed both of my rear window motors with your ingenious "fix"! Just have to make sure the solder isn't too high and opposite contacts don't touch when reassembled. happened to me on both sides. Installed, didn't work, redid solder and made sure brass pieces weren't touching, reinstalled and PRESTO! Worked like a charm. THANK YOU! Cost me $5 bucks for the pair of 194LL bulbs!!!!! Oh, mine is a 2002 Odyssey which I just bought w/189k on it, but runs great and shifts fine.

Rudy - 回复

I am not quite clear on how exactly to remove the part that holds the thermistor from the connector housing.

I tried several times but to no avail ...

So now thinking of making a separate part that just connects the cable connector to the rear of the motor.

Am I right to assume that the light bulb is just actually wired in series to one of the connectors or in other words the light bulb is in series with the motor ??

Thanks in advance.


Indo Roowet - 回复

Marvin. thanks for the pdf and the method. For the 194LL bulb that you mentioned, Autozone now has the 14V/4.6W 2 pack available. Could you tell me If it is okay for this fix? as in the pdf file I cannot See clearly about the voltage and wattage of the bulb. Thank you.

Jiwawa Law - 回复

The existing P.T.C thermistor out of the cap on the end of the motor that I tried to soldier my wires to delaminated, not to mention difficult stuffing it all back into the cap, and getting it back on. I tossed the cap! I bought a 194 bulb socket - O'Reilly Auto Parts # CTI 85814 $3.99- . I cut the modular plug off at the van's harness and noted which wire ran directly to the 12 volt motor, as opposed to the thermistor, slipped a .187"solder-less connector on the wire (and put a drop of solder on it anyway) and connected that to that tab on the motor. The other wire from the car harness goes to one end of the bulb socket and the other wire from the bulb socket goes to the other tab on the motor. Next through process of elimination, I ended up using an 11 watt 12 volt landscaping bulbs from Lowe's,- 12 VOLT LV55 WEDGE BASE-which plugged into the O'Reilly 194 socket. I started with the 194LL that you suggested, but the windows wouldn't open. After trying a 7 watt, I ended up with the 11 watt. THANK YOU!

John - 回复

So I took my passenger side vent motor out and took the motor apart heated up the prongs that have black plastic between them removed the plastic and soledered them back together and plugged everything back in and hooked it back up and it worked like a charm. You do not have to hook up a light bulb to repair it. Just heat up the connector that has plastic between it and remove it. It's perventing it from getting the proper voltage. Any questions feel free to email me at tjhicksgoarmy24@gmail.com


Since the resistance of the circuit varies depending on the temperature, the lightbulb is used is used to bleed off the potential excess current instead of letting it rush into your motor windings, overheat your motor and cause a bigger problem like a short, or meltdown, or worse - a fire.

It may be true that if you don’t use it often and don’t hold the switch on for long after the motor has stopped opening or closing the window that you won’t experience a problem but Honda could certainly not engineer anything that way and it clearly isn’t smart.

edtmol - 回复



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