Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


3 posts

Wannabe Geek


Topic # 239811 6-Aug-2018 09:46
Send private message quote this post

Hi All,

 

Lots of info on the net but I cannot find the answer to this particular question.

 

I know that on the 04-05 Mazda Axela the LCD part of the dash that has the clock etc is powered through the stereo. So I am looking to retain this function by retaining the original stereo and installing another stereo in the pocket at the top of the dash that sometimes holds a lCD screen stereo. In this case it has been removed prior to my purchase. 

 

Now I know that when I pull the plug from the stereo to connect the new unit I will lose the power supply to the OEM stereo. I have all the correct cables for easy install of the new unit including steering wheel control module.

 

 

 

So two questions:

 

1 - If I can connect an alternative power supply to the OEM stereo will the LCD part of the dash still function?

 

2 - Will the steering wheel controls work from the new module (specific to the stereo and car model so plug and play) with the OEM stereo still installed with power supplied?

 

Thanks in advance. I hope my first post on this forum is clear enough :-)

 

Nick. 

 

 

 

 


Create new topic
3 posts

Wannabe Geek


  Reply # 2083216 3-Sep-2018 13:34
Send private message quote this post

Hi Nick. Possibly too late and a tad tangential but if like me your frustration is around the lack of an AUX in have gander at the wee circuit board by AUXMod. I put one in my Altenza and I still use it.

 

 

 

Regards

 

 

 

Glenn




3 posts

Wannabe Geek


Reply # 2083224 3-Sep-2018 13:48
Send private message quote this post

Hi Glen,

 

Managed to get the job completed on the weekend. Fitted the aftermarket stereo into the top pocket where the japan cars have the LCD screen. Used two aftermarket wiring looms from Arepro to plug straight, includes steering wheel control module. I then bought a second stereo loom from a wrecker and plugged that into the OEM stereo. I connected the appropriate wires into the wires behind the original plug to have the LCD function. 

 

Most difficult part was working out which two wires fed the steering wheel control buttons as these created a conflict. BUT for some reason the radio on the new stereo fluctuates in and out of tune when driving. It is ok when sitting at the lights or using BT, USB,CD or AUX. that might be my next topic on this forum.

 

Appreciate the input though. I am sure my daughter appreciates all the effort so far which also includes new speakers.


21 posts

Geek


  Reply # 2083236 3-Sep-2018 14:17
Send private message quote this post

Hi, I'm looking at doing the same thing. Did you leave the existing factory stereo in place? Could you provide what actual wiring looms you used?

 

Did the LCD stay connected to the original stereo and you just effectively migrate the speaker wires across to the new stereo?

 

Cheers

 

Phil




3 posts

Wannabe Geek


  Reply # 2083306 3-Sep-2018 15:30
Send private message quote this post

Hi Phil,

 

Parts required are;

 

1 X control harness C for Mazda Part #:Arepro CHMZ12C (This has the steering control module included.

 

1 x Sony to ISO patch lead Part #:Arepro APP9SP3 (Can buy for any popular brand stereo but will have a different part #) 

 

1 x Mazda stereo plug with 200mm of wires cut from old wiring loom at wreckers and

 

7 or 8 splice connectors and some insulation tape.

 

1 x antenna extension as the original is quite short.

 

Method:

 

     

  1. Remove dash panel strip and OEM stereo. https://www.youtube.com/watch?v=y4aOtsd5xkU
  2. If putting new stereo in top pocket Remove glove box. You will see the screws from the fascia strip removal in above link. Pull out from the top, remove glovebox light and remove unit.
  3. You will never get the wires through the small hole in the rear of the pocket so I drilled a 25mm hole into the LH side of the pocket closer to the front of the pocket.
  4. Feed a wire through the hole from the pocket and and route down to the hole where the OEM stereo came out. 
  5. Connect the APP9SP3 lead to the CHMZ12C lead.
  6. One by one connect this wire to the aerial wire, steering control patch lead and stereo plug (APP9SP3) using insulation tape and pull through the hole in the pocket.
  7. Plug the large CHMZ12C brown plug into the OEM  white stereo plug. You could now plug the three plugs you have pulled through into the pocket into your new head unit and it would all work correctly without the OEM stereo.
  8. Plug the second hand loom into the back of the OEM stereo.
  9. You ignore the 8 wires that run along the bottom of the plug as these are speaker wires. 
  10. Using the splice clips, connect all the remaining wires to their matching colors on the OEM loom with the exception of the black earth wire, brown/yellow stripe & white/black stripe wires. These two are the steering control wires that are not needed.
  11. Connect The black earth wire to the OEM loom with the matching wire by solder or larger splice clip then insulate with tape.
  12. Test the operation prior to going any further
  13. Reinstall glove box, OEM stereo and Trim.
  14. Decide how to mount the head unit. I made two small angle brackets for each side of the head unit and drilled two holes in the base of the pocket to secure them. NOTE: you can only use small 10mm long screws as you will press against the vent passage moulding.

 

Now you should have the LCD working with clock and climate control info. You can still turn the stereo on but it does not affect anything.

 

Hope this helps and another note is the cost of the wiring looms was the same price as the stereo, speakers not included. I changed out the front speakers and will also do the rear later. 

 

Cheers,

 

Nick.


699 posts

Ultimate Geek
+1 received by user: 442


  Reply # 2083322 3-Sep-2018 15:57
Send private message quote this post

Regarding the radio fluctuating in and out:

 

My experience is in Toyota's not Mazda's but they a likely to be similar - Toyota's have a RF amplifier for the aerial. These need power which usually comes from the factory head deck and the aftermarket looms do not always cater for this. (after market head-decks don't usually have an output that goes to 12volts when you are using FM you see). The resolution to your problem may be to find the RF amp power supply wire in the factory loom and supply it with switched accessory power. You don't want to supply it with continuous power or it will slowly flatten the battery.


3112 posts

Uber Geek
+1 received by user: 1205

Subscriber

  Reply # 2083504 4-Sep-2018 00:26
Send private message quote this post

tripper1000:

Regarding the radio fluctuating in and out:


My experience is in Toyota's not Mazda's but they a likely to be similar - Toyota's have a RF amplifier for the aerial. These need power which usually comes from the factory head deck and the aftermarket looms do not always cater for this. (after market head-decks don't usually have an output that goes to 12volts when you are using FM you see). The resolution to your problem may be to find the RF amp power supply wire in the factory loom and supply it with switched accessory power. You don't want to supply it with continuous power or it will slowly flatten the battery.



Some aftermarket headunits have an output that is intended for controlling an auto retracting aerial. Which would be perfect for an aerial amplifier power source. Otherwise use the amplifier remote out wire.





1615 posts

Uber Geek
+1 received by user: 171

Subscriber

  Reply # 2083510 4-Sep-2018 06:33
Send private message quote this post

Checkout these guys, they have a range of headunits to fit everything (almost). Some of their newer stuff replaces the whole 'dash' with a fitted touch screen. 

 

https://www.oemaudio.co.nz/multimedia-units/mazda

 

 

 

 


Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.