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Copyright 2005 Crutchfield Corporation
4.
Attach the power cable to the positive battery terminal (not directly to the battery post itself).
For top-mounted battery posts, the most common way to do this is to crimp a ring terminal onto
the end of the power cable (most cables in wiring kits come with it already attached), remove the
battery terminal’s nut, slip the power cable’s ring over the bolt that secures the battery terminal to
the battery post, and replace the nut. For GM vehicles with a side-mount post, we offer an adapter
that works nicely.
Thread the wire loom (included with some kits) over the red power cable until it reaches the
firewall and cut to fit. Thread another piece over the short power wire running from the fuse holder
to the battery.
Anchor the fuse holder to a suitable spot with a self-tapping screw (see photo on page 2).
5.
Remove the radio from the dash to access the turn-on wire (usually a blue wire). The turn-on
wire will “tell” your amplifier to turn on whenever the receiver is powered up (usually, whenever
the vehicle is turned on). For step-by-step instructions on removing your vehicle’s radio, see your
vehicle-specific Crutchfield MasterSheet™ (available for most vehicles), or read our In-Dash
Receiver Installation Guide.
Strip the insulation off a small section of this wire coming from the radio, wrap the blue turn-on lead
(included in amp wiring kit) around it, and solder. Or, make the connection with crimp connectors and
a crimp tool. Wrap the solder or crimp connection with electrical tape (or use a heat gun to apply
heat shrink tubing) to guard against a short. Using wire ties (included in the kit) to secure the wire,
route the blue turn-on lead behind your dash to the place where the red power wire comes through
the firewall. You will route the turn-on lead and red power wire together to the amp location.
Locate the remote turn-on lead behind your radio
(usually a blue wire), and connect the turn-on lead
from your amplifier wiring kit to it.
Making the Signal Connections
6.
If your in-dash radio has preamp (RCA) outputs, connect the RCA patch cables (included with
most kits) to these outputs, taping them together so they won’t come apart. Route the patch
cables (again, using wire ties) to the OPPOSITE side of the vehicle from the power cable and blue
turn on lead. It’s important to separate the patch cables from the power wires to avoid potential
noise problems. Now you can partially re-install the radio in the dash (don’t push it all the way in,
in case you need to fix a problem later.
Step 7 begins on page 5.
