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Intermittent Rear Wiper Mod

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Old Jan 1, 2011 | 08:25 PM
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Default Intermittent Rear Wiper Mod

Anybody tried this on a 2nd gen? I figure its the same and I am up for trying it but I wanted to see if there maybe another method.

https://www.scionlife.com/forums/sho...r+speed&page=2
Old Jan 3, 2011 | 07:45 PM
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I didn't do that, but I installed a different stalk and designed & built a couple circuits to add an intermittent rear mode. The idea in the article is certainly sound and should work.
Old Jan 3, 2011 | 07:48 PM
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Originally Posted by TrevorS
I didn't do that, but I installed a different stalk and designed & built a couple circuits to add an intermittent rear mode. The idea in the article is certainly sound and should work.
Nice! What stalk did you use? So you can change the interval from the stalk right? How difficult was it to hook up the circuits? Could you provide a diagram?
Old Jan 4, 2011 | 01:30 AM
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All I did was implement the intermittent mode selectable by the more flexible stalk. The added functions are choice of front intermittent delay, plus a fixed intermittent mode for the rear (keeps the standard continuous mode). The convenient thing is the upgrade to the front comes with the stalk, however, the upgrade to the rear takes both a degree of expertise and some work.

The solution described in the linked thread is a lot simpler than what I did. One complication is if you change the stalk, our xB2 connector pins match fine, but it doesn't support the intermittent rear wiper position. Another is a standard automotive relay from PepBoys etc can be driven fine from a robust timer circuit, but I found it loud and annoying in the car interior. And of course, there are the problems of building and pretesting circuits, robustly packaging them, securely hiding them, and building an appropriate wiring harness, including making the necessary car harness/switch pick offs (plus you need to keep complete documentation, of course ). I have two circuits, one to provide the wiper sweep timing and trigger, the other to replace the mechanical relay with an electronic one (dead quiet) -- that's two boxes and the second one includes a heatsink. I really wouldn't consider this kind of thing unless you are pretty proficient with electronics.

PS. If you really wanted to, you could install a rheostat or selector switch somewhere for adjustable rear wiper interval, but I personally don't have the need. I just approximated the slowest front rate and that's quite sufficient for me.

PPS. My wiper stalk came from a Prius. I understand the current Prius and Matrix both have that stalk functionality, however; I think the stalk markings may have changed style from both mine and the xB2.

Last edited by TrevorS; Jan 4, 2011 at 05:54 AM.
Old Jan 15, 2011 | 05:15 AM
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Originally Posted by TrevorS
I have two circuits, one to provide the wiper sweep timing and trigger, the other to replace the mechanical relay with an electronic one (dead quiet) -- that's two boxes and the second one includes a heatsink.
I see there's been no response following my cautions ! I am serious, if you're not plugging together standardized components the situation gets much more tricky. You have to allow up front for the possibility of a failure, and if you did it yourself, you can't just turn it over to your dealer or favorite repair service and expect them to repair it. For fun, here's a photo of my electronic relay !

Name:  XBrearWiperERelay.jpg
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If something goes wrong, the only person I can turn to is myself.
Old Jan 17, 2011 | 02:22 AM
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TrevorS, looks like you live in DE too. Where abouts? I'm just south of Dover. You mention documentation of your circuits. Care to share? I've hooked up some relays in my car for my foot well lights. I also had to dig into my stalk on my old civic.
Old Jan 17, 2011 | 05:18 AM
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I still think you'd be best off following that link you posted at the beginning of your thread. However, here is my complete documentation. Everything here was designed and developed by me personally for use in my xB2 (including the 555 timer and E-Relay circuits). I'm not providing any assurance that any other person's efforts with it will be successful -- this is not a DIY. Car harness wiring specifics are provided in the tech docs available via the xB2 DIY tech section of this forum.





Last edited by TrevorS; Jan 19, 2011 at 12:45 AM. Reason: Restored two images
Old Jan 17, 2011 | 06:24 PM
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This is solid info. Nice job on the documentation. Are you an EE? Do you have anything similar for how to got your headlights to illuminate when you lock and unlock?
Old Jan 17, 2011 | 10:04 PM
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Yes, I have an EE degree, but I've been an electronics hobbyist much longer.

Thanks for the compliment, it took a lot of study on the associated car harness wiring and wiper switches before I could actually start work. Documentation is not only critical to performing diagnosis and repair, but I also needed it just to get started -- documentation comes first, corrections can be made as needed, but a detailed road map is critical. Generally speaking, I also tried to minimize my impact on the xb2 harness wiring.

I did build a circuit that shuts down the mains and brights when the key is removed from the ignition switch. It doesn't kill the momentary brights signal switch, but I saw no reason to include that -- takes a human action and supposedly, no one is in the car. It also doesn't kill the parking, etc, lights. I only sought to achieve consistency with what I'm personally used to (headlight shutdown with key removed from ignition).

In any case, as above, here is my complete documentation. Everything here was designed and developed by me personally for use in my xB2. I'm not providing any assurance that any other person's efforts with it will be successful -- this is not a DIY. Car harness wiring specifics are provided in the tech docs available via the xB2 DIY tech section of this forum.


Old Jan 20, 2011 | 06:05 AM
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I don't see a response to the headlight disable information, so if it's not useful, I'll remove it from the thread.
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