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9.5.1
Install Fuse Holder and DC Power Cable and Make Power Connection
The Control Head has a moderately high quiescent-current drain so red wire power connection to the
output/load side of the Time-Delay Relay (relay’s yellow wire) through the Fuse Block is highly
recommended. Refer to the respective wiring diagram at the end of this manual.
NOTE
Do not share the Control Head’s fuse with any other device. Doing so can cause excess
current to flow through the fuse, causing it to blow unnecessarily.
1.
Connect the Control Head’s DC Power Cable (Item 5 in Table 4-3) to the large 3-pin connector at the
rear of the Control Head. Visually align the key and gently push and turn the outer locking ring
clockwise until it stops. A click will be sensed to confirm proper mating.
2.
At the back of the Control Head, form a cable service loop of at least six (6) inches, and tie and stow
the cable as necessary.
3.
Route the cable’s red (positive power) wire through channels in the vehicle to the location of the Fuse
Distribution Rail Assembly. Remove interior panels, door kick panels, etc. Protect the wire from
possible chafing as necessary.
4.
Remove the end stop on the fuse side of the Fuse Distribution Rail Assembly, clip the Fuse Block
included in the Fuse Distribution Accessory Kit (Item 6 in Table 4-3) onto the DIN rail next to the
radio’s block, and snap the end stop back onto the DIN rail so both blocks are firmly fixed to the rail.
Refer to the instructions included with the kit as necessary.
5.
Strip and connect the red wire to the load-side of the newly installed Fuse Block.
6.
Install the 5-amp ATC fuse included in the kit into the Fuse Block’s fuse slot.
CAUTION
The fuse for the Control Head is rated at 5 amperes. Installing the wrong fuse value
could lead to damage. Verify the Control Head has the correctly rated fuse! The color
of a 5-amp ATC fuse is tan. The 15-amp (blue) ATC fuse included in the kit should
not
be used for CH-103/CH-103PA Control Head power; it can be returned to stock or
stored as a spare for the radio.
9.5.2
Make Ground Connection
1.
At the back of the Control Head, locate a nearby section of vehicle chassis ground and strip this area
of any paint or dirt to expose a bare metal surface.
2.
Cut the black wire of the Control Head’s DC Power Cable as short as possible, but long enough for a
service loop, then strip it and crimp a 3/8-inch ring terminal (included in the fuse kit) to it.
3.
Drill a hole as necessary and screw this ring terminal to chassis ground. Use a self-threading screw or
other appropriate hardware to ensure a reliable metal-to-metal contact.
9.5.3
Connect DC Power Cable’s White Wire
A review of the information presented in Section 8.1 may be beneficial at this time. As required per
the chosen power-up configuration, follow one of the three procedures presented in the sub-sections