Hi, I'm having problems installing a new 4 x 52W Sony head unit in my 1990 300ZX Twin Turbo. The problem is the 1A fuse to the permanent power supply keeps blowing as soon as the volume is turned up over 20 or a CD is put in the player. Maybe has something to do with the turbo timer??? I've got no amplifier or subbie or anything. Can't imagine how the completely factory standard 4 speakers or basic head unit could cause this fuse to blow. I've tried everything! Please help!
Did you connect just the permanent power from the stereo to this wire or both the permanent power and the supply power from the stereo to it? The stereo uses this for memory only, and shouldn't draw enough current to blow the fuse but the supply wire will draw upto 10amp depending on the headunit.
I connected the permanent power (memory) and the power supply (ignition) separately to the correct wires. The ignition one has a 10A fuse and the memory one has a 1A as you correctly pointed out. There muse be a short in the wire somewhere between the battery terminal the centre console. I tried bypassing the 1A fuse and the stereo still cut out when the volume went above 20 but when I turned it back down it started working again so maybe the stereo has an automatic cut off if there is a spike or surge in the current. I've tried it with 2 separate stereos - both 4 x 50W - one JVC and the other a Sony. It's got me buggered.
So its not blowing the fuse? Sounds like voltage drop. As you bring the volume up, it draws more current than the wires can supply. Think of it like cheap jumper leads, you can't start a car with small cheap jumper leads because the can't carry the current. You may have to run new wires from the battery back? It might help. Does the whole stereo cut out, lights and all?
I have a Pioneer head unit in my car and the permanent power supply to keep the clock and station info. is ALSO the wire that supplys the power amplifiers in the unit. The wire from the ignition only is there to turn the unit on and up the power aerial. For the constant power connection i ran a separate 15 amp wire from the battery with a 10 amp fuse holder very close to the battery. I'd check your manual or contact the people you bought the unit off for their thoughts. Good luck. Cheerz.
just a tip....get some heavy duty power cable for your head deck and maybe a new battery..........and go for either pioneer or kenwood...sony head decks dont make very good sound....but they have some great subwoofers
Power My kenwood head unit takes most of its power from the "accessory" switched power from memory. I connected a new reasonably heavy wire from right near the relay in the drivers footwell fuse box. Really simple once you find the right realay.
I had no switched wire (musta been cut off before i had the car) and i tapped in from the clock, mine is working ok, and as said its a kenwood, i took a sony out of it cos im not a fan.
