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"Considering the Alpine KTP-445U Power Pack, which is an amp that can be powered off your factory head unit's power wire as long as the fuse is 15A or higher. It seems the main fuse is only 7.5A, but my '89 also has the 20A Dome fuse in the engine bay's fuse box, and per the diagram below, apparently it is used with later MK3s that had a separate factory amp. My car does not have that external factory amp, but do I have what I need to power that Alpine amp? Or am I gonna need to run it directly from the battery like any other amp? If I do have what I need fuse-wise, would I then need to tap into a different wire, or just the usual power wire (blue/yellow, I believe) going to the head unit?"
So on an '89 without factory CD player the P-L (pink w/ blue stripe) wire is the amp turn on from the radio power switch. It's from the 7.5 amp radio fuse and it's in the 10 space radio plug "A" at position 9 in pic below 3
Amp gets a turn on signal from the P-L wire once head unit is powered on.
The power for the amp is off the 20 amp dome fuse which is the L-Y (Blue w/ yellow stripe) wire which is also in the 10 space radio plug "A" It's Hot all the time. Top row below tab release on end at position 4 in pic.
So on an '89 without factory CD player the P-L (pink w/ blue stripe) wire is the amp turn on from the radio power switch. It's from the 7.5 amp radio fuse and it's in the 10 space radio plug "A" at position 9 in pic below 3
Amp gets a turn on signal from the P-L wire once head unit is powered on.
The power for the amp is off the 20 amp dome fuse which is the L-Y (Blue w/ yellow stripe) wire which is also in the 10 space radio plug "A" It's Hot all the time. Top row below tab release on end at position 4 in pic.
MK3 TEWD On-Line
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