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Thread: 2002 Toyota Tacoma Monitor Issues

  1. #11
    Newbie sprkyjtm's Avatar
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    Ah... damn. I just wrote this big long reply and the stupid site lost it...

    Anyway, I'll try again.

    Thank you for the offers to help fabricate this, but I want to do most of the work myself so that I learn from it. I will, attempt to pick your brains on this site as I find problems though. Also seanz0rz, I'd love to come to the SoCal meet, but I work that day :~(.

    Is your HVAC stuff controlled by sliders or knobs seanz0rz? Mine is controlled by knobs, and it's similar to this guys: http://http://www.mp3car.com/vbullet...-am-whord.html. Scoll down the first post, and you'll see what I mean.

    When I went back and read my post explaining my system, I found that I was very unclear, so I'll try again.

    What I was trying to say was that the doors in the dash that control where the air comes out (eg. Windshield, straight out of the dash, floor, etc...) are controlled by servos.

    If I turn the ignition so that the electrical system is on but the engine is off and turn the vent control knob, I can hear a few servos whir in the background, and the doors click when they're done moving (a second or two after I've finshed turning the knob). This makes sense because in order to have a metal rod move several inches to open and/or close a few ducts when the control knob is only moved a little bit would require either a complex mechanical system or a motor (servo) that takes its cues from the knob. Right???

    The fan is attached to an electric motor, so the fan speed knob just raises the resitance in the circuit since the motor's speed is determined by the current in a constant voltage system. Current = Voltage/Resistance... So, since voltage is relatively steady during normal operation, all you can do to affect the current is to change the resistance. So the knob in some way or another changes the resitance in a circuit. Should just be wires which are easy to move.

    The A/C and recirc are just buttons, so it's another electrical circuit and the buttons are switches.

    The temperature control is the toughee. From what I have read, I think that that is controlled by vacuum tube(s). I'm pretty sure that there's one or more vacuum tubes back there in my truck, I haven't taken the whole dash or console off, but I've kinda tried to poke around.

    So, vents, fan, recirc, and A/C are electrically controlled which means extending wires; that's pretty easy to do. The temperature, I think, is controlled by vacuum tubes which is not too difficult to move.

    Am I wrong? As I said, cars are not my forte. I am deducing all of this from my electrical experience and the information on a few websites. If I'm wrong, please tell me. I want to learn about this stuff.

  2. #12
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by sprkyjtm View Post
    Ah... damn. I just wrote this big long reply and the stupid site lost it...
    No, it wasn't lost. Because you have a low post count (under five is the cutoff, I believe) and posted with links and/or photos, your post was flagged for moderation. It's a measure to help control spam.

    I made the most recent post visible and deleted the prior one. If you want it the other way around, just let me, or any other mod/admin know.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #13
    Newbie sprkyjtm's Avatar
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    Oh...

    Ok, the message that you made visible is just fine. The original took awhile to write, but the rewrite only took like five minutes and they are essentially the same so it's no big deal.

    I just assumed that it was the site because I've had problems with other forums losing my stuff. They actually lost it, not something like this.

    Thanks for the reply.

  4. #14
    Maximum Bitrate seanz0rz's Avatar
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    huh, i was pretty sure all tacomas were cable actuated through 04, but maybe with the switch to the climate control in the 99+ limited runners and 01+ all models, they switched to a servo driven piece.

    i can assure you nearly 100% that the temp control is not vacuum driven, but in fact a cable that goes through the firewall to a valve on the heater core, it also has an electric circuit connected to the same knob, not exactly sure what it does (all of this info comes from dissecting my unit when i was considering my options for movement. it will either be a black or opaque white sheeth that houses a stiff metal cable. the valve should be centered on the firewall, with a hose out either end and a small ring terminal on the end of a cable attached to a lever. i see no reason for toyota to re engineer this piece when the use of an electric servo would have worked fine, and the cable actuator was proven to work. ill have to do more research for you on that.

    these levers only have about 2 inches of travel on them, amazing what you can do with a few inches of travel and a lever.

    if you hear servos for everything but temperature control, i dont think moving them would be all that hard. wires are easy to extend. the cables might not be, but there are ways of working around it. i would be more than willing to offer my knowledge to you, and you can PM me here and drop by cal poly pomona sometime if you need help, want to poke around my setup, etc.
    1998 Toyota 4Runner SR5 V6 4x4 in Evergreen Pearl Metallic, Lifted, Locked, and Armored. CarPc in custom console with molded touchscreen.
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  5. #15
    Newbie sprkyjtm's Avatar
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    Hmm. Alright... I probably got some bad advice from a website regarding the vacuum stuff. Though I can easily deal with the wires, and probably the cable if it has enough give.

    I will continue poking around, and I'm sure that I'll have more questions as I figure stuff out. The holdup is that I need to save up enough money to buy all the equipment, and then I need the time to install it. At the earliest, that will be this summer. Thank you for your help; I'll probably need more and I'll pick your brain as needed.

  6. #16
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    Here is what I ended up doing with my 04 Tacoma. It worked out better than I expected it would. I chose to mount the screen in place of the stock stereo for a few reasons. First, I figured it wouldn’t get as much sunlight sitting low in the dash. If it were mounted higher in the dash, the brightness of the screen would also be a distraction at night, and it’s not as noticeable to people outside the vehicle. Finally, it took the least amount of effort. My previous vehicle was a 96 Tacoma. On that vehicle I removed the vents, lowered the HVAC controls and placed the screen at the top. I am much happier with the way I did it this time around.
    Attached Images Attached Images  

  7. #17
    Newbie sprkyjtm's Avatar
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    Wow, that looks great. What I figured I'd do is to look at the HVAC controls when I pull apart the dash. If they're easy to move, I will move them. Otherwise, I'll just deal with the monitor down below them.

    BTW... Which monitor is that. I've been trying to decide what size to get. It looks like an eight inch.

  8. #18
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    No, it's a 7" Lilliput screen, I can’t remember the model number.

    Another advantage of having it where I do is that I can rest my arm on the top of the shifter when I'm doing a lot of configuring.

  9. #19
    Newbie sprkyjtm's Avatar
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    Ok, thank you. Your's fits well so I will probably get a similar model.

  10. #20
    Newbie ghettodish's Avatar
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    Another option....

    I was going to bezel-mount my screen too, but too many others complained about the screen angle being difficult to read. In my '04 Tacoma I mounted my Lilliput between the shifter and the seat. I just slid the screen mount under the front edge of cup holder. It's the perfect angle, easy to see and reach, and hardly ever in direct sunlight.

    My Voom2 case fit under the drivers seat and can eject DVDs/CDs within reach while driving.
    From a Tower with 4x40 LCD, to ThinkPad with cantenna, to MP3Car rig....Flux Capacitor is next...as soon as I get my Mercedes with built-in toilet and meatloaf oven.

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