Interface Leads
Interface Leads
Troubleshooting Guide
Interface Lead Item nr. 67785 for
Carkit does not start up. Check if there is 12V between the black and the red wire and also between the black
and blue wire, in the 16 pin connector, when the car is started. If there is not 12v on both wires please check
the following:
If there is supply on the red constant 12v wire but not on the blue ignition wire the car may require an
alternative ignition source. See installation step 4.
Check that the bullets on the supply wires are properly connected. The supply wires are the red, blue
and black wires.
Check for a blown fuse on the Interface Lead or in the cars fuse-box.
The carkit does not turn off
Please make sure the key is removed from the ignition barrel. On many new cars ignition is not turned
off until the key is pulled out.
Is there an ignition supply on the blue wire? There should be no voltage on the blue wire when there
is no key in the ignition. See installation step 4.
Speakers are not muted.
Check that the mute wire is connected to the right position. See installation step 3.
Locate the radio instruction manual and check for special menu settings regarding phone input.
Please check that there is close to 0V on the yellow mute wire during a call. If there are more than
approximately 0V the carkit may be defective please try another carkit.
Speakers are muted but there are no carkit sound.
Please check that the carkit and radio volume is turned up.
Locate the radio instruction manual and check for special menu settings regarding phone input.
The carkit may be defective. Please try another carkit.
Radio will not turn on or not working properly after installation.
Please check for a blown fuse at the back of the radio or in the car fuse-box.
Please check that all connectors are properly connected and that there are no bend or damaged pins.
Remove the Interface Lead and connect the radio to the original car connector. If the radio is now
working replace the Interface Lead.
Volume to high or sound is disordered.
Please try to turn down the carkit volume and turn up the volume using the radio volume control instead. If the carkit volume has to be turned almost completely down improved adjustment range can
be achieved by connecting a inline resistor item number: 68897 inline with the white wire to limit the
carkit output.
There may be a Ground loop problem when combining this exact carkit and radio model. Please try to
insert Ground loop isolator item number: 69897 inline with the white and white/black wires from the
Technical Specifications
L-shaped with bullet connections for Ground, Constant 12v and Ignition.
Normal Wire dimensions :
AWG 18 for power wires, AWG 20 for all other wires
Standard Fuse sizes:
3 Amp for constant supply, 1 Amp for Ignition supply
Maximum Fuse size:
7,5 Amp for constant supply, 7,5 Amp for Ignition supply
400 x 400 mm
Configuration chart for 16 pin connector:
Connector seen from cable entry side
Product Description
The Interface leads range allows connection of Aftermarket carkits to OEM Phone preparation.
Interface Leads are used when installing aftermarket telephone carkits. It is used for car stereos with a Phone
Line-In function or VDA preparation. It enables the use of the car speakers when answering/making calls from
your cell phone. For a complete cable-set two item no. are required. The first is a car-specific Interface Lead.
The second is a carkit-specific Interface adaptor cable .
Speaker-function: This is achieved by connecting the carkit directly to the cars Line-In input/VDA connector. By
using the radios built-in switch function the telephone conversation is heard through the car speakers while the
radio sound is muted. This way you will achieve a perfect hands free sound without interference from the car
Power supply of the carkit: All Interface Leads are delivered with power and ground from the car connector
connected to the carkit, this way cutting the cars wiring loom is avoided.
Ignition supply: If an ignition source is available in the radio/VDA connector then it is also available in the 16
pin connector. If an ignition source is not available a constant 12V source is connected to the Ignition pin via
bullet connectors. If a real ignition is required for the chosen carkit, an IGNIBOX item no. “I” can be connected
to create an artificial ignition or an ignition source found elsewhere can be connected to the bullet with the
blue wire. The 12V ignition wires in the Interface leads are blue.
Aux integration
Some Interface leads have the radio AUX input available in a 4 pin connector. This will allow the use of the car
sound system amplifier for Music playback when installing Music carkits and thereby achieving higher audio
Interface Leads
Interface Leads
Installation description
8th. Insert the Interface Lead between the radio and the removed radio connector.
Interface Lead Item Nr. 67785
for Audi, Seat, Skoda, VW 2003Needed items:
A: Interface Lead.
B: Interface Lead carkit adaptor.
C: Carkit.
Note: The Carkit C and Interface Lead adaptor B are bought separately.
1st: Remove the key from the ignition barrel. This is done to
avoid error messages on the car electrical system.
Bullet Connectors
A: Interface Lead
Item number 67xxx
4 pin
16 pin Connectors
9th. Connect the carkit ‘C’ to the Interface Lead using the Interface Lead adaptor ‘B’. Interface Lead adaptors for Music carkit include a 4 pin AUX connector. This is used for connecting an optional Kram AUX solution. By
adding a Kram AUX solution you will achieve a much higher audio quality when playing music from the carkit.
And the music will be heard in all speakers. Please see our website for further information about
AUX solutions.
10th. Test function and adjust volume. When the Interface Lead is installed correctly it will redirect your call
through the car front speaker. Adjust the volume setting using the carkit and radio volume control. Note that too
high carkit volume will distort the sound.
B: Interface Adaptor
Item number DAxxx
How to move Line-in and Mute pins to OEM Accessory plug.
2nd. Remove the radio and disconnect the Fakra connector from
rear of the radio.
C: Carkit
3rd. Choose mute position. This Interface lead has two mute positions available. Please chose the right mute position by switching
the bullet connectors on the yellow wires. The correct position can often be seen on a label on the radio.
“MUTE IN 1” is used for older Audi, Seat, Skoda, VW cars.
“MUTE IN 2” is used for newer Audi, Seat, Skoda, VW cars.
Only applicable for cars equipped with Accessory plug in the car connector.
Step 1:
Remove the pin-holder from the Accessory plug on the Interface Lead by lifting the locking mechanism with a
small screwdriver and pulling the pin-holder outwards:
Step 2:
Remove the pins from the pin-holder. This is done by pressing the pin-lock with a small screwdriver.
4th. Check ignition source. Not all models have an ignition source in the prewired position in the cable set.
Therefore it is possible to disconnect the blue ignition wire from the cable set and connect it to an ignition source
found elsewhere or the red constant 12v wire by using the bullet connectors . Alternatively a IGNIBOX item nr. “I”
can be inserted to generate an artificial ignition.
5th: Check fuse size. The fuse on the Audio2Car cable should not be bigger than the ones used on the wiring
loom supplied with the carkit. The fuses on the Audio2Car cable should be replaced with a size similar to the ones
supplied with the carkit.
Note: Never exceed the Maximum Fuse size for the Interface Lead. See maximum fuse sizes on the last page.
6th. Move connectors from the Fiber-Optics, Accessories and CD-Changer slot on the original car connector to
the connector on the Interface lead. This is necessary to keep full function of the radio.
Step 3:
Insert the pins into the OEM accessory plug fitted to the connectors on the Interface Lead. Remember to point
the pin-locks in the right direction. White/Black in inserted in position 6, Yellow in position 10 and White in
position 12.
Fiber Optics slot
CD Changer slot
Accessories slot
Front view of connector
7th. If the original car connector is fitted with a plug in the Accessories slot this should also be moved to the
connector in the interface lead. The Line-in & mute wires will have to be removed from the Accessories plug delivered with the Interface Lead and fitted directly to the connector in the Accessories plug from the car connector.
A step by step guide for removing and re-inserting pins can be seen on the bottom of the next page.
See our complete Interface Lead program on