AUX-BM4 - Unknown CRUX - Free user manual and instructions

Product Type	Auxiliary Input Adapter
Brand	CRUX
Model	AUX-BM4
Dimensions	Approximately 2.0 x 1.0 x 0.5 inches (50 x 25 x 12 mm)
Weight	About 0.5 oz (15 g)
Power Source	USB (5V DC, 500mA) or cigarette lighter adapter (sold separately)
Input Interface	3.5mm stereo auxiliary (AUX) jack
Output Interface	Direct connection to car stereo via RCA or vehicle-specific harness
Compatibility	Works with most vehicles and aftermarket stereos with AUX input
Main Function	Connects portable audio devices to car stereo via AUX cable
Cable Length	AUX cable: 3.3 ft (1 m)
Material	Plastic housing with gold-plated connectors
Operating Temperature	-20°C to 60°C (-4°F to 140°F)
Certifications	CE, RoHS compliant
Installation	Plug-and-play, no additional wiring required
Maintenance	Keep clean, avoid moisture and extreme temperatures
Safety Features	Built-in short-circuit protection
Spare Parts Availability	Replacement AUX cables and adapters available from CRUX
Warranty	1-year limited warranty from date of purchase

Frequently Asked Questions - AUX-BM4 CRUX

How do I connect the AUX-BM4 to my car stereo?

Plug the AUX cable into the adapter's output and the other end into your car's AUX input port. If your car doesn't have a dedicated AUX port, you may need a vehicle-specific harness (sold separately).

Does the AUX-BM4 require external power?

Yes, it requires power via a USB port or a 12V cigarette lighter adapter (both not included). The adapter draws 500mA at 5V.

Can I use it with any portable device?

Yes, it works with any device that has a standard 3.5mm headphone jack, such as smartphones, MP3 players, tablets, or laptops.

Why is there no sound coming from my speakers?

Ensure the AUX cable is fully inserted at both ends. Check that the car stereo is set to AUX input mode. Verify the portable device's volume is turned up and not muted.

Is the AUX-BM4 compatible with Bluetooth?

No, this model is a wired auxiliary adapter only. It does not support Bluetooth streaming.

Can I use the AUX cable that came with the adapter for other devices?

Yes, the included 3.5mm cable is standard and can be used with any device that has a headphone jack.

How do I clean the adapter?

Gently wipe the housing with a soft, dry cloth. Avoid using liquids or abrasive cleaners to prevent damage.

What should I do if the adapter gets wet?

Immediately disconnect the adapter and let it dry completely in a warm, dry place. Do not use until fully dry to avoid short circuits.

Is there a warranty on the AUX-BM4?

Yes, CRUX offers a 1-year limited warranty against manufacturing defects. Keep your receipt for warranty claims.

Can I install the adapter myself?

Yes, installation is plug-and-play. For vehicles without an existing AUX port, you may need a professional installer to wire the adapter.

USER MANUAL AUX-BM4 CRUX

Close-up of a black electrical plug with a digital display showing 'SUN 2018' and 'SUN 2019' (no text or symbols on the plug body)

AUX-BM4 OBD Coder Audio Input Cable

INSTALLATION INSTRUCTIONS:

1. Locate OBD-port and remove cover (commonly located under the dashboard on the driver side).
2. Turn ignition switch to ACC.
3. Wait until the navigation has booted.
4. Plug coder into OBD-port.
5. The navigation will re-boot.
6. When the navigation startup-screen shows, remove coder from OBD-port.
7. Your radio's Auxiliary Audio input feature is now enabled.

To remove the Auxiliary Audio feature from the navigation's menu repeat steps 1-6. After the first use on a vehicle, the coder AUX-BM4 is personalized to this vehicle. On this vehicle the enabling and removing the Audio-AUX feature can be repeated without limit.

The AUX-cable must be connected into the female Quadlock connector of the vehicle harness on the back of the radio (receiver under the AC vents).

Quadlock connector, chamber B

Pin 2 • Audio (+) left (white)

Pin 7 • Audio (+) right (red)

Pin 8 • Audio (-) ground (black)

OPERATION:

1. Activating the Auxiliary Audio Input feature on the radio will create an AUX tab on the source drop down menu.
2. Plug in your external audio source, ie. iPod, MP3 player, DVD player to the Aux input cable.
3. Using the controller on the center console, go to the source menu and click on the AUX tab.
4. Audio should be heard on the factory sound system.

VEHICLE APPLICATIONS:

1 Series	3 Series	5 Series
2007-2011 (E87)	2007-2011 (E90)	2007-2010 (E60/E61)
2007-2011 (E81)	200-2011 (E91) Wagon
2007-Aug 2013 (E82)	2007-2012 (E92) Coupe	X6
2007-Jun 2014 (E88)	2007-2013 (E93) Convertible	2008-2012 (E71)
6 Series	X5
2007-2010 (E63/E64)	2007-2013 (E70)

SYSTEM COMPATIBILITY:

BMW vehicles with 10 pin LVDS (CCC, M-ASK, Champ). Professional with 8.8" or Business with 6.5" screen navigation systems.