screen with no memory

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1990mustanggt

Member - Posts: 5

Joined: April 11, 2012

Location: North Carolina, United States

Posted: October 27, 2012 at 2:44 PM / IP Logged

i bought and had a screen installed in my wifes car dont ask why lol any way the problem is the memory donsnt work is there any way to make it work. as of right now i dont know the name or number of the screen but will get them if any one knows please let me know i cant think of a way to do it thanks in advance

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: October 27, 2012 at 7:16 PM / IP Logged

Yes find out what the problem is and fix it that might just mean replacing the memory or a chip or be as simple as reconnecting something that method or parts needed will depend on what screen it is and if its a windscreen it probably isnt a memory problem but you might want to check the wipers or washer bottle instead lol feel free to ignore that latter advise

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: October 28, 2012 at 11:28 AM / IP Logged

why are you even posting without telling us the make, model and year of the vehicle plus make and model of the screen and by the way define "screen", single screen, multimedia, single DIN fold out, 2 DIN etc.

Also it ain't our problem, it's yours or the installers.

It's a bit like buying a second hand dishwasher with problems but you can't tell us the make model or what the problem is.

No memory, define please.

1990mustanggt

Member - Posts: 5

Joined: April 11, 2012

Location: North Carolina, United States

Posted: October 28, 2012 at 12:30 PM / IP Logged

the screen is a double din boyo AVN700a its in a 05 focus the problem is, its like the 12volt wire the one that keeps memory for the clock and the radio isnt connected but it is. every time i want to use the screen i have to push the reset button on the screen to get it to come on.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: October 28, 2012 at 2:36 PM / IP Logged

Test that wire at the set. Is it red or yellow?

Memory wire should be yellow, ACC red.

Possibly other way round on the Ford so test.

kreg357

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Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: October 29, 2012 at 7:00 AM / IP Logged

Here is a link to the Owners Manual :

http://www.retrevo.com/d/ds/progress?doc=02d7573bf15a2ae742ba55ea488e21a3&rk=0.6137456313346163

There are three wires you should check to ensure they are connected correctly. Use a Digital

Multi Meter. ( And of course Howard was correct with the wire colors and function! screen with no memory -- posted image.

)

The Black wire should go to a good chassis ground source.

The Red wire should go to an ignition Accessory source. An Accessory wire will test as follows :

OFF ( 0 Volts ) while vehicle is OFF or key in ignition switch at OFF position.

ON ( +12 Volts ) with key in ignition switch at ACC & ON positions.

OFF with key in ignition switch in START position.

The Yellow wire should go to a +12V constant power source. This wire will hold memory pre-sets if

they are volatile.

Also remove any fuses in the Red or Yellow wires and test them with a DMM.

Soldering is fun!

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: October 29, 2012 at 7:13 AM / IP Logged

Of course Uncle Howard was correct, EVERY aftermarket I've ever seen (except German) follows those wiring conventions.

Japanese industry aftermarket specs.

kreg357

Platinum - Posts: 7,827

Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: October 29, 2012 at 7:32 AM / IP Logged

Never any doubt, Uncle Howard! screen with no memory -- posted image.

Soldering is fun!

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: October 29, 2012 at 7:48 AM / IP Logged

Wish we could obtain the manuals for some of the obscure Chinese product people try to install (against our advice).

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screen with no memory

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