Saxo and electrics!

david_w2k · 19-02-2004, 14:13

Right, this could in fact be two seperate problems on my Citroen Saxo. Yes i know lol, this is probably completely the wrong place, but im desperate!

My Sony head unit has suddenly decided to stop working. Nothing displays on the screen etc. I have checked the wiring and even plugged in the standard tape player, which worked.

Decided to have another look at it last night(dark) and realised the interior lighting wasnt working. I had earlier in the day checked the 10a fuse, which is fine. I have checked it again.. and its still fine.

Are these problems related, or did i break the lighting and clock by taking out the 10a fuse to check it earlier?

The battery is fine and my Infinity Basslink sub still has power directly from it and the engine starts etc.

The fuse on the head unit is fine and there is a 12 volt supply to it (checked using multimeter). Are these two seperate problems? Is my cd player dead as well as the lighting and clock etc? Is it possible that the standard tape player would work and the cd player not, without the cd player being broken?

Help much appreciated, Cheers

paulyoung666 · 19-02-2004, 14:30

can you try the cd player in another car , i dont suppose it would have an internal fuse as well would it , probably not , but you never know

you say you checked the fuse , did you do this using a multimeter or did you just eyeball it ?????????????

SMHarman · 19-02-2004, 14:35

You've a switched live and a permanent live going into a head unit. Are both receiving power, are both properly connected . They sometimes have inline switchover plugs so as Vauxhall wiring (where these are backward) can be accomodated. These can work loose.

Check to see if an internal fuse exists (probably does).

Stuartbe · 19-02-2004, 14:43

Could it be some sort of security on the head unit ? Some unit lock out if you take the memmory +12v feed away !

Just a thought !

david_w2k · 19-02-2004, 14:47

Thanks for the quick responses! I multimetered the fuses. It appears that maybe (i cant tell because i may be checking the wrong cables, i will check it properly shortly...), the constant supply has failed. Is it possible that the cd player requires both the supplies to work correctly?

SMHarman · 19-02-2004, 14:48

Quote:

Originally Posted by stuartbe

Could it be some sort of security on the head unit ? Some unit lock out if you take the memmory +12v feed away !

Just a thought !

Sony usually work on face off - not pin code security. Even so you would get a message on the screen such as code.

At the mo it looks like there is no power gong to the unit.

Have you tested the cables on the block connecting to the head unit, not just the power ISO block.

Stuartbe · 19-02-2004, 14:50

Quote:

Originally Posted by david_w2k

Thanks for the quick responses! I multimetered the fuses. It appears that maybe (i cant tell because i may be checking the wrong cables, i will check it properly shortly...), the constant supply has failed. Is it possible that the cd player requires both the supplies to work correctly?

Yep - most head units need 2 suply's - one for retaining the memmory codes ect and one to power the unit. Some have a third that controls the backlights when the head unit is on......

Ramrod · 19-02-2004, 14:51

I thought this thread was about salt spilt in some electrical apparatus

paulyoung666 · 19-02-2004, 14:51

Quote:

Originally Posted by david_w2k

Thanks for the quick responses! I multimetered the fuses. It appears that maybe (i cant tell because i may be checking the wrong cables, i will check it properly shortly...), the constant supply has failed. Is it possible that the cd player requires both the supplies to work correctly?

it would deffo need the permanent supply to work , but maybe not the switch one , as it is used to keep radio tuning etc intact , having said that , both may be needed

SMHarman · 19-02-2004, 14:52

Quote:

Originally Posted by david_w2k

Thanks for the quick responses! I multimetered the fuses. It appears that maybe (i cant tell because i may be checking the wrong cables, i will check it properly shortly...), the constant supply has failed. Is it possible that the cd player requires both the supplies to work correctly?

Requires both.

Could be on a separate fuse - like the one for that also does the rear window, so check the cars fuses again to make sure you have caught the right ones.

david_w2k · 19-02-2004, 14:53

Ok and heres the clincher. Is it possible that the original tape player (which works when the ignition is on) only needs the constant supply?

paulyoung666 · 19-02-2004, 14:55

Quote:

Originally Posted by david_w2k

Ok and heres the clincher. Is it possible that the original tape player (which works when the ignition is on) only needs the constant supply?

yep , that would certainly cover it

SMHarman · 19-02-2004, 14:56

Quote:

Originally Posted by david_w2k

Ok and heres the clincher. Is it possible that the original tape player (which works when the ignition is on) only needs the constant supply?

If it only works when the ignition is on then it may work with only the switched supply (which is the one you say is working).

Salu · 19-02-2004, 15:32

nthellworld.....you can't say it isn't diverse can you?

bob_builder · 19-02-2004, 15:37

My standard Saxo CD player works on either the constant or switched power supply - don't know if that helps!