Recently put my alpine 9851 in my LH Torana however it doesn't seem to save its settings when the ignition is turned off over a long period of time..
Have I wired it up wrong?
Head Unit problem
Started by
_Rzeractor_
, Nov 02 2006 10:26 AM
7 replies to this topic
#2
Dangerous
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Posted 02 November 2006 - 05:27 PM
It needs one power wire connected to permanent 12 volts (usually a pink wire), and another power wire (usually red) connected to 12 volts via the ignition switch.
For an LH, you can use the stop/tail/dome/horn fuse for the full time 12 volts (pink? wire), and either the radio fuse or the heater fuse for the red wire.
For an LH, you can use the stop/tail/dome/horn fuse for the full time 12 volts (pink? wire), and either the radio fuse or the heater fuse for the red wire.
#3
_LX8VD69_
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Posted 02 November 2006 - 06:26 PM
i thought the constant on a head unit was always yellow
#5
_devilsadvocate_
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Posted 02 November 2006 - 08:56 PM
It does seem to be the industry standard, and was on the alpine units Ive owned, but that was a while ago. However, I dont think there any real regulations that have to be adhered to and each manufacturer is free to make the wires whatever colour they like.i thought the constant on a head unit was always yellow
#6
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Posted 02 November 2006 - 09:33 PM
i reckon it might be an unwritten rule or something because of installed a few head units of various brands and they all seem to follow this theory,It does seem to be the industry standard, and was on the alpine units Ive owned, but that was a while ago. However, I dont think there any real regulations that have to be adhered to and each manufacturer is free to make the wires whatever colour they like.i thought the constant on a head unit was always yellow
red for ignition
yellow for constant
black for earth
blah blah blah
#7
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Posted 03 November 2006 - 02:17 PM
You could be right - there is an ISO standard for car stereo wiring colours, and even plugs these days, but it's not mandatory. Older units tended to use pink, but I dunno how old the alpine unit in question is. Hopefully Rze's either got the wires labelled, or has the wiring/installation diagram handy.
Rze, if you don't know which ones' which, the main power wire (red) should have a large value inline fuse somewhere and possibly also a little black box which houses an inline filter, the fuse will probably be rated between 5 and 15 amps. The memory backup wire should also have an inline fuse, but it will be a small value one, eg 3 amps or less.
Hope that helps.
Rze, if you don't know which ones' which, the main power wire (red) should have a large value inline fuse somewhere and possibly also a little black box which houses an inline filter, the fuse will probably be rated between 5 and 15 amps. The memory backup wire should also have an inline fuse, but it will be a small value one, eg 3 amps or less.
Hope that helps.
#8
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Posted 03 November 2006 - 09:10 PM
Again, not familiar with how the newer ones are wired,assume 9851 is a new one;
Alpine, 'did' use the system of the main power via the red wire connected to the accessories and the yellow wire, smaller power rating connected permanently to 12V.
However, they may have gone the way of other manufacturers such as Sony where the main power wire is permanently connected to 12V(yell wire) and the red wire just connects to the accessories to trigger the unit on. It really is a better way to do it as the power req of high power front end units have increased past what can be considered as a negligble load to the accessories.
Alpine, 'did' use the system of the main power via the red wire connected to the accessories and the yellow wire, smaller power rating connected permanently to 12V.
However, they may have gone the way of other manufacturers such as Sony where the main power wire is permanently connected to 12V(yell wire) and the red wire just connects to the accessories to trigger the unit on. It really is a better way to do it as the power req of high power front end units have increased past what can be considered as a negligble load to the accessories.
Edited by devilsadvocate, 03 November 2006 - 09:17 PM.
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