LCD Monitor Fluctuates with Voltage
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Cadillac Audio, Video and Security Systems Discussion, LCD Monitor Fluctuates with Voltage in Item Specific Cadillac Discussion; Hi all, I just put a Pioneer AVH-P3200DVD head unit and a cheap TView 24" monitor in the back of ...
  1. #1
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    LCD Monitor Fluctuates with Voltage

    Hi all,

    I just put a Pioneer AVH-P3200DVD head unit and a cheap TView 24" monitor in the back of my Fleetwood limo. The monitor has a "noise filter" in-line in the power wiring. I hooked the power for the monitor up to the same power supply as the head unit.

    When I really crank it up, I can see the video on the 24" monitor fluctuate with the bass. I assume that this is because of the power draw from the head unit. Would using a different circuit for the monitor help? I don't want to hack the thing apart again if it won't help.

    Here's a vid (doesn't show the fluctuation I'm talking about):

    http://www.youtube.com/v/bbGyvpF99M4&hl

    TIA,
    Jim

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  3. #2
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
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    Re: LCD Monitor Fluctuates with Voltage

    ok i don't know what you have as for amps and such for a power drain. but i believe the issue is this. your factory wiring for your HU is designed to power your factory radio. now you replaced it with a aftrmarket not a real problem. but now you tapped into your HU wiring harness and added a tv . you are taking a already low voltage power line and adding strain to the wire. remember back in science class when you had one light bulb hooked up to a battery and then when you added more the lights were dim same concept. so wire your tv to another power source. i would tap into the fuse box . i would use a circuit that can be used when the car is in acc like cir lighter fuse or ac fuse . make sure you fuse the tv positive lead before you tap into the fuse post any questions

  4. #3
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: LCD Monitor Fluctuates with Voltage

    Quote Originally Posted by still_walkin View Post
    ok i don't know what you have as for amps and such for a power drain. but i believe the issue is this. your factory wiring for your HU is designed to power your factory radio. now you replaced it with a aftrmarket not a real problem. but now you tapped into your HU wiring harness and added a tv . you are taking a already low voltage power line and adding strain to the wire. remember back in science class when you had one light bulb hooked up to a battery and then when you added more the lights were dim same concept. so wire your tv to another power source. i would tap into the fuse box . i would use a circuit that can be used when the car is in acc like cir lighter fuse or ac fuse . make sure you fuse the tv positive lead before you tap into the fuse post any questions
    That's kind of what I figured. I don't have any amps or anything, but the new head unit is definitely more powerful than the stock one. I guess it's a bigger drain than the circuit was designed to handle.

    I can run the power lead right to the fuse box, with an inline fuse like you suggested. It's a job for a warmer day, though....

  5. #4
    still_walkin's Avatar
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    Re: LCD Monitor Fluctuates with Voltage

    Yea just pull the fuse you choose to tap into get 3/4 inches of 16 guage wire and push the wire in when you push the fuse in. A 20a fuse should be good. After that ground it to the biggest part of the chasis u can find. Shorter the ground the better. I would reccomend putting a switch to be able to turn it on while driving but its your call on that

  6. #5
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: LCD Monitor Fluctuates with Voltage

    Quote Originally Posted by still_walkin View Post
    Yea just pull the fuse you choose to tap into get 3/4 inches of 16 guage wire and push the wire in when you push the fuse in. A 20a fuse should be good. After that ground it to the biggest part of the chasis u can find. Shorter the ground the better. I would reccomend putting a switch to be able to turn it on while driving but its your call on that
    Thanks. It has a power switch on it, and a remote so I'm good there.

    I have it grounded to a huge bolt in the passenger kick panel - where there's a bunch of other grounds.

    I think I left enough slack in the power lead to get over to the fuse box, too.

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