New HU but having connection problems

[Snap]

I bought a new head unit and i tried to connect it but having no luck. I followed the instructions given but no joy. I think the problem might be to do with one of the connectors.

1. I think its the auxilory power connector, What does it do?
2. Im confused about:

Continuous power supply & switched power supply - what is all this about?

Car with or without ACC conncetion?? Huh?

My old unit didnt have a yellow cable connectio but my new unit has. What does it do?

My new units connections. The guy at the shop told me to swap the yellow and red, did that and it didnt work, swapped it back and still didnt work



My old unit's wiring and no yellow wires??


Im puzzled, please help a novice.

[jimbo]

dont fret my friend this is very easy to solve 

1. you should have a permenant power (live) conection so that the radio remembers your settings. this is connected directly to the battery or a feed that is always live and not affected when you turn the ignition key off.

2. you will need an suitable earthing point for you earth unless you loom already has one. find a shared earthing stud behind the dash and use that.

3. your yellow wire should be an illumination wire. this needs connecting to the illumination circuit in your dash. this is the ciruit that feeds power to your switches and heater controls to light up when you turn your lights on. if you have a mk2 golf it is the grey and blue wire that runs around inside the dash. this automaticly dims the units display for night time driving when the lights are turned on.

4. ACC conection meens that the radio will only turn on when the ignition is turned to the ACC mark or turned all the way but not turning the engine over. this also meens that the radio turns off when you turn the ignition off so that you cant lleave the radion on when you leave the car. If you want to use this feature you need a supply from th ACC circuit. as i have a mk2 i have used the power feed for the fan swith in the heater controls. this is a ciruit that only has power when the ignition is in ACC position. if you dont want this feature just connect it to the permenat power feed and you can turn the radion on or off regardless of the ignition.

5. a point to remember is that some units will only work if the ariel is connected so make sure you have a good ariel connection.

i hope this help you if not just post a photo of the wiring diagram and your model of car and i am sure we can help you out 

[Mr Blue]

connect the red and yellow together on the new wiring. then connect these to the old red wire in the car.

Connect the black wire to the brown or the black (cant see the pic clearly)



BANG! 

only kiddin

[Snap]

Some more info:

Ok, here goes the new connector supplied with the unit has these wires on it:

c = column

c1       c2      c3        c4
red      blue     0         0
black      0     yellow    0

And it looks like:




The corresponding connector on the car side goes something like this:

c1         c2                c3               c4
red         0                 0                yellow/white
brown     blue/white     brown/red    0

Car side connector looks like:

[Dizzie]

do what I do. chop the whole lot off and solder it all in

[Snap]

Im an electric illiterate so me thinks if i do that, my cars gonna blow up.

Im pretty sure that theres another problem else. If i just swap the yellow and red, it should work but it doesnt. Is there a fuse somewhere (apart from above the bonnet pull) where a fuse could have blown?

[jimbo]

1. your old loom =

1.red = permenant live
2.brown = earth
3.blue/white = illumination
4.brown/red =ignition live
5.yellow/white = elecrtic ariel

These designations i am quite sure of as they have come out of a bently manual.

Warning the following is only based on assumption and we all know what assumption is the mother of all...........

your new loom =

10.red = ignition live
11.black = earth
12.blue = illumination
13.yellow = permenant live

These are only assumptions but if you post a piccie of the wiring diagram we can tell you for certain?

try connecting them in this format:

old loom? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ?new loom

1.red = permenant live.........................13.yellow = permenant live?

2.brown = earth..................................11.black = earth

3.blue/white = illumination....................12.blue = illumination

4.brown/red =ignition live.....................10.red = ignition live

5.yellow/white = elecrtic ariel................ not used

[Snap]

These are only assumptions but if you post a piccie of the wiring diagram we can tell you for certain 

Sorry but where can i get the wiring diagram from? 

From the fitting instructions it says:



Yellow = continuous power supply
Red = switched power supply
Blue = power arerial control
Black = earth.

[jimbo]

Sorry matey i ment the wiring diagram supplied with the radio but it dont matter as you have stated what i need to know?

try connecting them in this format:

old loom? (car loom)? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?new loom (radio loom)

1.red = permenant live......................... yellow = permenant live (continous power supply)

2.brown = earth.................................. black = earth

3.blue/white = illumination.................... not used

4.brown/red =ignition live..................... red = ignition live (switched power supply)

5.yellow/white = elecrtic ariel................ not used

try that format for starters and if that dont work connect the red and the yellow on the radio loom to the red on the car loom?

[Snap]

Didnt work mate  I even switched it over and it didnt work.  But when i plugged it in there was a winding noise so power was getting to the unit but nothing appeared on the screen.

What amp should the fuse be for the radio (not the back of the radio but in the fuse box)?

The other connection on the car loom goes like this:

green&blue/solid blue/solid red/green&red
red&brown/brown&blue/brown &white/brown&black


The other connection of the units loom:

1. black&purple/3. black&grey/ 5. Black&white/ 7. black&green
2. solid purple/ 4. solid grey/ 6. solid white/ 8. solid green

According to the instructions:

1&2 - speaker rear right
3&4 - speaker front right
5&6 - speaker front left
7&8 - speaker rear left