TOP VEHICLE TECH GR4MZ1 User manual

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The informaon provided in this document is subject to change without noce due to changes and/or
improvements to the product/s.
This dash image is a visual representaon for display purposes only.
V1.0522
GR4MZ1
INSTALLATION MANUAL
MAZDA

2006-2008

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The GR4MZ1 installaon kit allows for the retenon of the vehicle’s steering wheel controls and maintains the
original aesthec of the interior when installing a new car stereo. The GR4MZ1 gives you everything you need
for a complete install in one box. The components of this kit are compable for the Mazda MX-5/Miata (NC,
2006-2008) with BOSE amplied Panasonic stereos. The wiring harness and interface will retain the steering
wheel controls, vehicle sengs and factory amp turn on wire (if vehicle is equipped).
Supplied with an OEM specic connector.


Installaons should be carried out by, or under the guidance of an experienced installer. If you do encounter any
problems during the installaon of this product, then please contact our dedicated customer service team at:
Phone:  E-Mail: 

• 1x Fascia plate (with accessories)
• 1x Instrucon manual
• 1x Steering wheel control harness and interface
• 1x DAB antenna adapter
• 1x Amp signal aenuaon lead
• 1x Stereo patch lead

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3. With the boom panels now removed, you will have access to the side of the radio. From here, you
need to remove a 10mm bolt located right on the side of the stereo.
1. Open the passenger side door and proceed to pull away the door trim from the pillar.


2. Using a set of panel removal tools, begin to pry away the pillar casing.
4. The DAB antenna not only has a self adhesive backing, but also features a black earth sheet. When
placing the DAB antenna, the earth sheet MUST be placed onto the metal part of the pillar. The antenna
itself must be located roughly 15cm from the top of the windscreen.


5. Once happy with the placement, take the 3m of wiring extension and feed it down through to the
stereo’s opening. With the wiring adjusted to the appropriate length, feel free to re-install the glovebox.
3. The glovebox will need to be made accessible to route the antennas wiring. To do this open the glove-
box and unclip the damper, once unclipped, push either side inwards and pull the glovebox down and
leave in the footwell.
4. Using a bojo tool, unclip both the le and right boom panels that surround the main fascia.

1. Take the OEM fascia and undo the 4x screws that hold the air control panel in place. Once free, relocate
this to the new fascia and screw into place using the factory screws.
4. With the cage/brackets congured correctly, and the “Stereo Installaon” process complete, simply
install the stereo and proceed to re-assemble the dashboard.
2. Take the pocket slide it into the boom poron of the new fascia, clipping it into place in the process.
1. Begin by pulling o the kick panel that surround the boom of the steering wheel.
2. Once o, undo the 4x screws holding the metal panel to the underneath of the steering wheel.
5. With these side panels removed, you will need to undo 2x screws located on either side of the main
radio. Once all of the above screws are undone, pull the radio out of the dashboard and disconnect all of
the wiring.
3. This fascia allows for the installaon of a single DIN stereo via means of cage or brackets. If using the
brackets, these must be aached to the stereo prior to installaon.
Please note: this kit also allows the installaon of a double DIN stereo. For double DIN installaon, use the
bigger set of brackets.

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
7. When all the above wires (and any addional accessories) have been connected, nally make the
connecons between the stereo and the vehicles pre-exisng power/stalk connectors.
4. Connect the DAB antenna’s SMB connector to the back of the new stereo.
5. Aach the antenna adapter to the vehicles pre-exisng connecon and the back of new stereo.
6. Aach the addional wiring on the harness to the back of the stereo:
- Speed Pulse  - Park Brake  - Reverse  - Amp Remote Turn On
3. Connect the amp signal aenuaon lead between the connecons on the vehicle and the new stereo.
1. Take the steering wheel control interface in hand and connect both the 12-way stereo patch lead and
the 14-way steering wheel harness connectors to the corresponding sides.
2. Connect the bullet connector from the stereo patch lead to the ‘steering wheel remote input’ on the
back of the new stereo.

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Please note: conguraon layout may dier dependent on vehicle model.

MODE 3
4
5
VOL
1
2
1. Volume +
2. Volume -
3. Source
4. Track +
5. Track -
1. Volume +
2. Volume -
3. Mode
4. Track +
5. Track -
 

• Press and hold ‘Mode’ (3) for approx 2 seconds. The vehicles screen will now display “Sengs”.
• Press ‘Mode’ (3) to select this opon. The screen will then display “Info/Clock”.
• Press and hold ‘Track -’  to enter me adjust mode.
• Press ‘Track +’ (4) to increment the me digit. Press ‘Track -’  to move onto the next me digit.
• Press ‘Mode’ (3) buon to exit or wait approx 10 seconds to automacally exit menu.

• Press and hold ‘Mode’ (3) for approx 2 seconds. The vehicles screen will now display “Sengs”.
• Press ‘Track -’ unl the display shows “Fader Adjust” and press ‘Mode’ (3) to select this opon.
• Using ‘Track +’ (4) and ‘Track -’  will then adjust the vehicles fader level.
• Press ‘Mode’ (3) buon to exit or wait approx 10 seconds to automacally exit menu.

• Press and hold ‘Mode’ (3) for approx 2 seconds. The vehicles screen will now display “Sengs”.
• Press ‘Mode’ (3) to select this opon. The screen will then display “Info/Clock”.
• Press (do not hold) ‘Track +’ (4) to access Trip Informaon. Keep pressing ‘Track +’ (4) to scroll through
dierent trip informaon.
• Press ‘Track -’ to return to clock display.
• Press ‘Mode’ (3) buon to exit or wait approx 10 seconds to automacally exit menu.

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ISO Connector
Connect to new stereo
OEM Specific Connector
Connect to relevant connector from vehicle
Main Wiring Loom Connector [14 Pin]
Connect to Interface Box
Interface Box
Flying Wires
Pink - Speed Pulse
Green - Park Brake
Purple - Reverse Gear
Blue- Amp Remote Turn On
ISO Amp Signal Attenuation Lead
Connect between speaker ISO connector on harness
and corresponding connector from new stereo
(Optional: only needed if vehicle is amplified)
Stereo Patch Lead Connector [12 Pin]
Connect to Interface Box
Note: Must be connected first, before
power connection is made to the
interface
Stereo Patch Lead Bullet Connector
Connect to ‘Steering Wheel Remote
Input’ on back of the stereo.
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If at any point you experience any problems and need any assistance before, during or aer the
installaon process, please contact us via :
Phone: 
E-Mail: 
Mon - Fri 9am - 5.30pm GMT

If you would like to download a digital copy of this manual, or any other product, then please
visit the www.topvehicletech.com website.
This manual is considered correct at the me of prinng but is subject to change. For the latest
manuals & updates, refer to our website.
Copyright 2022 by TopVehicleTech.
All rights reserved. No part of this publicaon may be reproduced, distributed or transmied
in any form or by any means, including photocopying, recording, copying or other electronic or
mechanical methods, without the prior wrien permission of the author.