Multiple LCD’s
Printed From: the12volt.com
Forum Name: Mobile Video, GPS, and Navigation
Forum Discription: Mobile Video Head Units, DVD Players, LCD and TFT Monitors, Navigation, GPS, PS2, PS3, XBox, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=11700
Printed Date: August 10, 2025 at 4:41 PM
Topic: Multiple LCD’s
Posted By: DjIQ
Subject: Multiple LCD’s
Date Posted: March 31, 2003 at 9:21 PM
I want to run 4 lcd's in my prelude, would it be safe to run the power for all of them straight from a switched power wire from the switch, if not what would be the best?
Replies:
Posted By: Velocity Motors
Date Posted: April 01, 2003 at 8:06 AM
Use a relay to power up the LCD's through a switch and use a switched IGN source for power so if you forget to turn off the switch , it doesn't drain the battery on you.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: DjIQ
Date Posted: April 01, 2003 at 11:41 AM
Thanks Jeff, I think i might have misscommunicated my question though, i meant from the ignition switch, i dont think i'll ever forget to cut the car off, my house and work keys are on the same ring, lol... Ive never worked with relays before, Can i just buy any relay from my local auto parts store?
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Posted By: DjIQ
Date Posted: April 01, 2003 at 11:50 AM
Oh, yea and also would i run the switched power to post 87 then out from 30 to the lcd's?
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Posted By: Velocity Motors
Date Posted: April 01, 2003 at 12:08 PM
Quick question.........did you wantt o hook up a switch to this or do you want the screens to turnon automatically when the car starts up ? Let me know. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: DjIQ
Date Posted: April 01, 2003 at 12:25 PM
i want the screens to come on with the rest of the accessories, mainly the radio
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Posted By: DjIQ
Date Posted: April 01, 2003 at 12:28 PM
yes... when the car starts up -------------
Posted By: Velocity Motors
Date Posted: April 01, 2003 at 12:34 PM
Wire a SPDT relay like this: - 86: GROUND
- 85 : Switched Ignition output from car
- 87 : 15 amp fused Constant Power
- 30 : Output to all the monitors
- 87a : NOT USED
This will isolate the power going to the monitors and will keep the power signal clean from other accessories such as wipers, HVAC & radio. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: DjIQ
Date Posted: April 01, 2003 at 12:44 PM
Thanks, I really appreciate that
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Posted By: DjIQ
Date Posted: April 01, 2003 at 12:51 PM
Last question........... would i be safe also running a PS2, and a DVD player off the same power as the screens
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Posted By: Velocity Motors
Date Posted: April 01, 2003 at 12:56 PM
Yes, the current draw will be very small for all these devices. The relay is rated at 30/40 amps so you have nothing to worry about.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: DjIQ
Date Posted: April 01, 2003 at 12:59 PM
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