
CHRYSLER CAN BUS INTERFACE
©Copyright 2004-2010 Metra Electronics Corporation
INSTALLATION INSTRUCTIONS
THIS PRODUCT INCLUDES INSTRUCTIONS FOR INSTALLATION
WHICH MUST BE CAREFULLY FOLLOWED. THE INSTRUCTIONS
ARE WORDED IN SUCH A MANNER TO ASSUME THAT THE
INSTALLER IS CAPABLE OF COMPLETING THESE TYPE OF
ELECTRONIC INSTALLATIONS. IF YOU ARE UNCLEAR AS TO
WHAT YOU ARE INSTRUCTED TO DO OR BELIEVE THAT YOU DO
NOT UNDERSTAND THE INSTRUCTIONS SO AS TO PROPERLY
AND SAFELY COMPLETE THE INSTALLATION YOU SHOULD
CONSULT A TECHNICIAN WHO DOES HAVE THIS KNOWLEDGE
FAILURE TO FOLLOW THESE INSTRUCTIONS CAREFULLY
AND TO INSTALL THE INTERFACE AS DESCRIBED COULD
CAUSE HARM TO THE VEHICLE OR TO SAFETY SYSTEMS
ON THE VEHICLE. INTERFERENCE WITH CERTAIN SAFETY
SYSTEMS COULD CAUSE HARM TO PERSONS AS WELL.
IF YOU HAVE ANY QUESTIONS IN THIS REGARD PLEASE
CALL THE HELP LINE OR THE METRA AT 1-800-221-0932
* READ IMPORTANT WARNING INSIDE
BEFORE ATTEMPTING ANY INSTALLATION
THE CHTO-03 IS DESIGNED TO BE USED WITH
VEHICLES THAT HAVE A FACTORY AMPLIFIED
SYSTEM. THE CHTO-03 WILL PROVIDE A 12-VOLT
SWITCHED WIRE FOR PROPER RADIO OPERATION.
THE CHTO-03 NOW PROVIDES MUTE, PARKING
BRAKE, VSS OR SPEED SENSE, AND A REVERSE
OUTPUT TO MAKE INSTALLING AN AFTERMARKET
NAVIGATIONAL RADIO SIMPLER AND LESS TIME
Cutting Tool • Tape • Crimping Tool • Connectors
TOOLS REQUIRED FOR INSTALLATION
When using the CHTO-03 with a radio that has a high audio
pre-out voltage, usually greater than 2 volts, the audio signal
may become distorted. To resolve this follow these steps:
1. Make sure the ignition is turned to the “off” position.
2. Disconnect both of the harnesses from the CHTO-03.
3. Locate the potentiometer next to the 14-pin connector at
4. Taking a small flat headed screwdriver, turn the
potentiometer counter-clockwise to lower the input
level going to the factory amplifier.
5. After making the adjustment reconnect the wire harnesses.
REV. 03-17-11 INSTCHTO-03
• CHTO-03 • 14-PIN HARNESS WITH RCA’S
• (2) 12-PIN HARNESSES TO 22-PIN CHRYSLER HARNESSES