i'm trying to install a seond hand alpine tda-7561r head unit into my vauxhall cavalier to replace the standard one but i'm having loads of problems! i had to buy a harness adaptor for the back of the head unit as it didn't come with one, but when i plugged the iso connectors together it came on for a couple of seconds then went straight off. i read on this board that vauxhall wiring is different so i have wired it up with:
car - head unit
brown - black (earth)
red - yellow (battery)
black - red (ignition)
but as soon as i connect the wires a fuse goes in the box under the steering wheel. sometimes it is a yellow one second in from the left on the top row - this seems to be for the dash lights. and other times it is a blue one eigth in from the left on the top row - this seems to be for the clock and interior light. has anyone got any idea what might cause these fuses to blow all the time? is the head unit dead?
You need to buy a digital multimeter and test all the wires for function without simply guessing what wire goes where.
The parking light fuse blows probably because you have connected your ground to this wire. It'll test a ground until you turn your lights on, and the fuse blows.
Here's what I recommend doing: Set your meter to measure DC volts, on a scale of at least 12 volts. Now, touch the black probe to a ground (antenna, or cigarette lighter rim). Touch the red probe to the wire you suspect to have constant power- when you find one that shows 12 volts under all conditions, this is your constant. Now test for your accessory lead- shows power only with the key on. Take the black wire on your new radio directly to ground (use a screw and ring terminal). Once you've identified these, set your meter on resistance, and test the remaining wires in pairs until you find some that show around 4 ohms. These will be your speakers. Touch a battery to the pairs of speakers and you'll hear a "pop" letting you know which wires are for which speaker. If the speaker moves out, the wire touching the positive terminal is positive, the other negative. If the speaker pulls in, it is simply the other way around.
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My ex once told me I have a perfect face for radio.
one thing i saw you didnt add geepherder was what kind of battery. a 9volt will be sufficent for locating speaker and polarity. good luck shimmy shimmy.
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JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs
Yeah, don't use an 18 volt DeWalt battery.
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My ex once told me I have a perfect face for radio.