Voyager and Grand Voyager amp information

02-05 models.
Most 02-05 models with amplifiers will require a relay in the fuse box in the engine compartment to be switched on.
See our instructions for details on how to do this.
For these cars use ISO harness 20-137 or 20-137B and follow the instructions to activate the relay.
29-630 can be used for cars with steering wheel controls.

05-08 models.
Most models are amplified and require the J1850 amplifier turn on interface or the amplifier can be bypassed.
Why two options? The J1850 interface (23-211) is more expensive but it is a simpler install at the back of the radio. The amplifier bypass cable (20-302) is cheaper but the installation takes longer and requires the cable to be run to the amplifier (behind rear right speaker).

Some cars are non amplified and use just a basic ISO harness (20-137) or steering control interface 29-630.

Steering controls.
If using the 23-211 J1850 turn on interface or 20-302 amplifier bypass cable, use 29-630-ISO.

Use 29-630 for vehicles that do not require the amp turn on interface or the amplifier bypass cable.