M

M8CPK

Active Member
I've just fitted a stereo in my 1996 300 tdi discovery. The radio doesn't switch itself off with the ignition. I've tested the wiring and the switched live doesn't go off with the ignition although the voltage does slowly decrease. What is the likely cause of this?? I thought ignition switch but looks like it might be a tricky job to replace.
Any ideas?
Thanks.
 
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Sounds like the constant and ignition switched wires may be the wrong way round. The yellow wire on your radio harness should be constant 12v and the red one ignition switched 12v.
 
I've tested the wires and got a constant 12v through a purpley wire and the switched is a blue and yellow wire. That wire shows 12v when the ignition is on but when turned off starts to slowly decrease as opposed to switching off.
 
Is it a LR unit or aftermarket? Is the feed from the wires you described, the actual wires from the vehicle or wires from a multi-pin harness that connects into the vehicle's wires?
 
dirtydiscov8 said:
Sounds like the constant and ignition switched wires may be the wrong way round. The yellow wire on your radio harness should be constant 12v and the red one ignition switched 12v.
Click to expand...

Yes, sounds like you need to swap the two around (constant live and ignition live). Aftermarket stereos are as above (yellow constant 12v and red igntion live), but a genuine LR radio might be different.....
 
Check if you have another switched live, the one you are using maybe for an electric aerial.
 
I'm looking at it again now. Permanent live is purple, switched live is green and orange wire. When left a while green and orange wire shows 0v switch ignition on and shoots upto 12.5v. Switch ignition off and slowly starts dropping as opposed to switching straight off. I'm happy this is the correct wire just can't understand the delay in switching off. Is this likely to be the actual switch? What does changing it involve??

Thanks.
 
Does the radio your fitting come with a lead that plugs into he back of it then
Into the discos original radio plugs. If it does make sure that the purple permanent wire you have is going to the yellow wire on your radios loom and the orange green to the red one.

I doubt it's the ignition switch. You'd end up with a flat battery pretty quickly and I'd imagine there be other lights still on your dash. The slow voltage could be something on the same circuit back feeding 12v after the key is removed or you could just have slowly electricity!!!
 
hi
Just wire both the red & yellow from the stereo to a permenant live !!!! sorted
had this problem on sooo many occasions i always do it that way.
Also means when your sat you can listen to the stereo without having the ignition on.
 
or if the colours differ to most then wire the perm & switched live from the stereo together & connect to the permanent live
 
It's definately wired correctly. It turns off with the ignition but not for 2 minutes. Where does the switched live come from? Does it go through a relay or similar that may have gone faulty??
 
I am having a similar issue but it doesn't happen all the time.
Normally, turn off the key; the stereo switches off... but sometimes, you can turn off the key and take it out of the ignition and the stereo stays on for a while before switching off. Sounds now like the voltage might be dropping away slowly and then finally going low enough for the stereo to switch off.

If you open the door enough for the interior light to come on, the stereo switches off immediately. Presumably because the voltage gets drawn by the lamp.

Quite a nice feature really. You get music til you actually get out of the car, but you know it's switched off as you're climbing out.
 
If your accessory relay is slow to de-energise (sticking) then obviously you will get a delay in removing of the 'switched voltage'.:)
 
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