Yesterday, I finally got round to fitting the carputer . Basically, what I did was put through all the wires and everything without the fuse in. Turned it on, and was playing around with it for about half an hour maybe with the engine off. When I finished, I took the fuse back out.
Today, I went to use it, put the fuse in, PC and amp turned on, lasted about 5 minutes and turned off, would not turn back on.
I had a feeling that it might have turned off due to battery getting too flat to start the car, so I tried starting my engine. It failed to start, (not being good on knowledge of cars) it sounds like ticking but did not tick over. I guessed this was my battery being flat.
I have a UK X reg Fiat Brava, m4-atx (used as normal power supply), battery and alternator are stock, 1000W amp, subwoofer, 6X9's and door speakers (5.25").
I don't know if I did something when I was installing it or if this is normal, but I'm sure that the M4-ATX turned off before the battery got too flat.
My old OEM head unit has 4X50W speaker outputs, and I've replaced this with a 250W M4-ATX so I don't know why it would drain power so quickly :S.
By timer settings, do you mean when it turns on and off?
if so, at the moment, the fuse is always out when off, to turn on I just put the fuse in. This then turns on my touch screen, PC and amp.
To turn off, I shutdown, this turns off amp (I think, haven't checked but should do), screen and PC. I then take the fuse out.
I will get this hooked up to my ignition soon, I just want to know why this is happening.
Thanks for your reply
Well, my dad the mechanic just jump started my car and it's sat running atm. He reckons that the battery was drained from all the messing around i did with the PC and stuff yesterday.
He also reckons that after about half an hour with my PC/AMP turned on and engine off, it will drain the battery. Is this correct?
If so, are there any batterys that can hold more juice?
You can get a bigger battery, how long it lasts will depend on the draw you're pulling from the battery and the battery itself.
I can't find it now, but yesterday there was a good post with the math of figuring out how long you can run on a battery. I wouldn't suggest runnin' your battery down very often, as your dad can attest, you'll kill your battery and prevent it from keeping a charge entirely.
EDIT: Found the post from this thread.
NEVER use “hard-off = NEVER” settings unless you understand the risks of battery depletion. Even with safety limits in place, your battery might be not be able to start your engine. “Hard-off=NEVER keeps your 5VSB rail on at all times”
I now read page 3. So the M4 will only turn the PC off if the Hard-Off is turned on?
Also, when I wire in the ignition, I will use P1(recommended). Which means dip switch 1 is on. Why does the manual show only 3 dip switches and in reality there are 4?