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Turning on the headlights turns off the radio!
Posted: 18 Jul 2008, 14:51
by Atlantic
I've just attempted to install a blaupunkt radio in my 1990 VW Westfalia Atlantic. the wiring has been hacked about by previous owners. I've patched on to the radio connector as per the instructions. However, the unit does not, as it should do, turn on and off with the ignition.
It does however turn on and off when you turn the headlights on! Obviously a bit suspect.
Any clues or ideas about why this might be happening?
Thanks
Posted: 18 Jul 2008, 15:09
by tonytech
Sounds like the main feed is connected to the headlight circuit, rather than a ignition switched live.
Some radios have a connection to the lighting circuit so that the display dims at night.
Brown wires are earth 0v
T
Posted: 18 Jul 2008, 15:16
by Atlantic
Thanks Tony.
Thing is, there doesn't appear to be a switched 12v. I had the following available: brown; 2 red; blue/grey; from what i can understand the blue/grey feeds from the instrument panel illumination; the brown is earth and the two reds are permantent 12v which feed back to the digital clock...
I seem to be lacking a further lead from the ignition.
Thanks, Fiona
Posted: 18 Jul 2008, 15:58
by kevtherev
Hi atlantic
does your van have a second battery or "leisure" battery? under the the seat
Posted: 18 Jul 2008, 16:01
by Atlantic
Hello
Yes, i have a leisure battery.
Fi
Posted: 18 Jul 2008, 16:24
by kevtherev
May I suggest then, you consider connecting the radio to this battery.... with a new power feed.
reasons are...
your radio will probably require a supply to it for it's memory.
being able to use it with the engine off
.. all this and no drain from the starter battery, so you can leave it on as long as you want
one wire and a fuse all available from halfords
Posted: 18 Jul 2008, 16:26
by Atlantic
Hello Kev
This sounds like an excellent solution!
Thanks loads, Fi
Posted: 18 Jul 2008, 16:28
by kevtherev
welcome to the forum Fi
Posted: 18 Jul 2008, 17:04
by jamesc76
Just to inform you i read mockis post ref fitting a radio and these vans dont have a switched feed to the stereo!!!
Posted: 19 Jul 2008, 08:46
by Atlantic
Ah ha. That's why i can't find one then...
Found a very useful post on the Brick-yard forum relating to this item.
The suggestion there, as above, is to run the 12v from the leisure battery rather than the starter battery.
Here's a how-to guide.
http://www.brick-yard.co.uk/forum/forum ... ?TID=11446
Hasten to add, I haven't tried this. not sure learning on the job should apply to auto-electrics...
Thanks, Fi
Posted: 19 Jul 2008, 12:16
by jamesc76
As long as you act safely you'll be ok dont connect anything to the battery till your happy and remeber if going to run it off the les. battery put a fuse in the line as close to the battery as you can that way if you get it wrong you wont send the lot up in smoke!!!
Posted: 19 Jul 2008, 13:52
by Atlantic
Thanks for the encouragement!
Having looked now at the back of the fuse box, my question is how do i determine which is the 12v feed for the circuit which controls radio/interior lights etc?
Its a birds nest back there...
Thanks, Fi
Posted: 19 Jul 2008, 14:12
by Mocki
fuse 3 on the late fusebox....
turn int light on, remove fuse, light goes off......
you initial problem sounded like no earthing.
Posted: 19 Jul 2008, 15:44
by Atlantic
Thanks Steve.
I can see that it's fuse 3 but not sure how the 12v power gets to this position - there are no leads directly behind that fuse position.
If i want to use 12v from the leisure battery, rather than from the starter battery, then it seems to me i need to swap the 12v lead to this circuit.
Does this make any sense at all????
Fi
Posted: 20 Jul 2008, 17:38
by Atlantic
Update:
Thanks to various threads and responses I have taken my first step in auto-electrics.
I have now modified the power to the radio and interior lights by running a lead from the leisure battery (with an in-line 15amp fuse) to the radio/in lights circuit. No more flat starter battery!
Highly recommended!