Swapping red & yellow wires
As anybody who's bored enough to read my ramblings recently will know, I'm going through the pain of installing an ERISIN Android head unit :duh:
One its more boring features is the length of time taken to boot up. It takes something like 40 seconds after turning the key before I can use it, which is a pain if you're trying to listen to a radio programme etc. I've read various suggestions to swap the +12 and Accessory wires, and wonder if this leaves the unit constantly powered up, but kind of on standby, like when I turn it off with its own button (while leaving the power from the car on)? If so, does this use much power? Might i run my battery down...? Thanks :D |
Basically yes, unless you use the car every day ,the battery will go flat fairly quick..
My ZT will go flat inside 10 days if not used C |
It looks weird in your case.
Mine has exactly the reverse symptom! Mine is switching on as soon as I've turned the key even I've not asked for it by pushing on the Erisin button. Nevertheless I'm pushing on the button every time before switching off the engine. I don't understand that oddity but I don't care now. Regarding the feed I'd just bought an ISO to BMW wire and connected to the ERISIN. No brainer. |
I fitted a new Erisin one not too long back and about a week after fitting it the dam thing crashed and I had to reset it. Loosing some features and now it’s rubbish!
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Wow... I'd have thought, with it turned off at the button, it would have sipped only a tiny amount of power... so thanks for the heads up :duh: Thanks for your thoughts, everybody. The further I delve into this little device, the more disillusioned I become. Still, if I forget all the amateurish touches, I quite like it. The sound is rather better than my Sony stereo, and the screen's quite nice. If the rear camera ever gets delivered, and I can get it wired in without destroying my number plate lights, I'll probably live with the hassle :o |
OK. The 45 second delay in booting every time I stop the car for a minute is really starting to wind me up - plus the fact that the radio starts with a hiss on 87.50, and I have to hit a favourite button manually. Small thing, I know, but there you are. Also have to manually switch the RDS/AF function on every time.
So I started thinking about swapping the wires again, and had a good look at the main loom which goes from the ISO plug to the stereo. There is no red (constant +12V) to it (blue line), though there is a small red wire to a much smaller plug which has various accessory connections... I don't know if that connects internally to the main power circuit, or not. No matter how I configure the stereo sleep settings etc, I get the long cold boot. Do you reckon, with no red to the main plug, it simply cannot receive power with the ignition off? If so, then swapping red & yellow is the only option, I guess :shrug: |
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In 'the olden days' pre ISO connectors, and Japanese and Euro cars having differing stereo wiring set ups, we had to correct this all the time. First confirm which one is permanent live on the car side and which is switched (forget about colours). Also important is to confirm any lighting wire, as this will normally appear to be an earth when the lights are off, and if there is, it is not being used in any way as an earth. (I do not think this is an issue, as they generally will blow the fuse, and switch off the stereo, but I do not know if the LSM will give protection against this though - my experience is 30 years old lol). The reason for mentioning this, is on some ISO adapter cables, there is a populated lighting wire/prong, and I imagine this could possibly create an issue (ie hopefully rule out an issue or confusion with wiring). Once these wires are identified, next confirm the ISO adapter corresponds to the wiring diagram/instructions of the stereo itself. Looking out for the electric aerial/amp switched wire - I have seen these wired incorrectly within an adapter cable (not an ISO). check that there is no blown fuse in the positive wires or on the back of the stereo. If the wiring and fuses all check out, then it is safe to assume the unit is faulty (or rather a component within it - some will have a button cell within them too, which may have died and they are not normally serviceable without breaking the warranty seals). The fact that it retains the favourites memory is throwing me, but these could be due to an app storing them instead. But even then, I would imagine it to lose all memory and stored info each time it was switched off. ----------------------------- As for the speed of start up, this was a reason why I have never been tempted to fit one myself. I would have assumed this to be normal (think of mobile phone start up times). Even ten seconds is a long time when moving off. |
Thanks for all that info Alan – for once, I’ve actually worked most of it out myself over the last couple of weeks :eek:
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Looking at wiring diagrams.of.other double dins, they mention handbrake (assuming for safety) and reversing wires. I am.guessing these are either fly leads from the unit or sockets in it. I haven't had a chance to read the original post through (nor this one fully yet), but I assume your car is iso compatible, and you are using an iso adapter, which then goes to the loom of the stereo. If so, follow the switched and perm lives to the plug of the stereo, then it's corresponding pin on the unit, to confirm it is not damaged and actually there lol. If you switch the stereo off, by its knob/button, before turning the key of the car off, does it retain its memory then I wonder? Another thought too, is that instead of a built in battery, I wonder if there is a capacitor inside to store power, and this hasn't been fully energised/charged (not sure of the term.for charging a capacitor lol). To which, it may work as expected after a long drive. Am.clutching for solutions before condemning the unit, I am.afraid. Sent from my SM-A025G using Tapatalk |
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The more I mess with it, the more I think it’s either a firmware problem, or the lack of permanent power to the stereo. But as they don’t provide a wiring diagram for the main socket, I may never know… |
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