Thread: Aftermarket radio no positive feed in loom and not dimming with headlights

Can you go back to a late model LR radio to ensure all the plugs etc work? Most wreckers would have them available.

i just fitted a pioneer double din screen dmh-z5150bt in my 07 sport I used the aerpro fp9290k install kit and I used the app9p108 patch lead it states that its not for the harmon kardon but im not running the standard amp and speakers ive got Rockford fosgate amps and speakers, I wasn't sure if it would work with the steering wheel controls but it does, I paid $203.00 for my kit the other kit for the harmon kardon amp is $900.00 but it wont let the factory sub work so its a waste of money if you ask me, I just went and checked and mine dims when I turn my lights on, so if you go on automotive superstore web site you may be able to buy the iso wiring harness that come with my kit and that may fix your problem, pity it wasn't last night I seen this post or I could of taken pics of the harness and colour of what wires went where so you could of made up a patch loom yourself butits to painful to take back out cheers Dean

Originally Posted by 666spt

i just fitted a pioneer double din screen dmh-z5150bt in my 07 sport I used the aerpro fp9290k install kit and I used the app9p108 patch lead it states that its not for the harmon kardon but im not running the standard amp and speakers ive got Rockford fosgate amps and speakers, I wasn't sure if it would work with the steering wheel controls but it does, I paid $203.00 for my kit the other kit for the harmon kardon amp is $900.00 but it wont let the factory sub work so its a waste of money if you ask me, I just went and checked and mine dims when I turn my lights on, so if you go on automotive superstore web site you may be able to buy the iso wiring harness that come with my kit and that may fix your problem, pity it wasn't last night I seen this post or I could of taken pics of the harness and colour of what wires went where so you could of made up a patch loom yourself butits to painful to take back out cheers Dean

The Aerpro kit makes it an easy swap, if you are fitting a reverse camera just connect the camera power to both the Aerpro harness purple wire and the camera power lead from the head unit.
This means no wiring at the camera end.

Originally Posted by swiftnets

Hey all,

The LR radio had been replaced before we purchased it with a simple Pioneer radio.

I have a double DIN Pioneer that talks to our phones better so I fiddled around and swapped them over.

Unfortunately the installer soldered the simpler plug in to the harness and so things like the radio changing to night mode when the lights turn on didn't work. Fortunately they didn't chop the original loom off completely and so I have worked through getting the right adaptors.

Plugged them in and have found the radio still doesn't dim with the headlights.

Is there a feed for that in the original loom? Where could i find one?

There isn't a positive feed in the original loom either, is that normal?

Is there a hand brake line that is negative when applied?

Thanks all

Michael

If your car is a HSE or had the fibre optic cable system then i believe there is no power in the harness.

Maybe start by mentioning what particular vehicle you are referring to and what replacement unit has been installed. There are differences between D3 and D4 and between the various spec levels, lowline to highline audio systems. There are also differences between different headunits and how they're dimming works - e.g. a new Alpine I just fitted has an auto dim feature from a light sensor on the front of it so does not use the wired in dash light dimmer signal.

But personally, if I had paid an installer to do the job and it wasn't done properly (as it sounds like) I would be returning to them for rectification.

Have you looked at the wiring diagram for your vehicle to identify the correct dash backlight wire? If there isn't an OEM factory fitted stereo one you can take from another switch or gauge on the dash, headlights/parklights. For the purposes of the testing you should be able to use any 12 volt signal to confirm that the feature works on the headunit and there isn't a warranty claim fault.

If the factory stereo connection plugs are still in place I suggest checking the Aepro brand website for the matching wiring harnesses to suit your vehicle and stereo (can't help you here as you haven't provided any details) and purchasing those, then it's plug in and play.

Originally Posted by twr7cx

Maybe start by mentioning what particular vehicle you are referring to and what replacement unit has been installed. There are differences between D3 and D4 and between the various spec levels, lowline to highline audio systems. There are also differences between different headunits and how they're dimming works - e.g. a new Alpine I just fitted has an auto dim feature from a light sensor on the front of it so does not use the wired in dash light dimmer signal.

But personally, if I had paid an installer to do the job and it wasn't done properly (as it sounds like) I would be returning to them for rectification.

Have you looked at the wiring diagram for your vehicle to identify the correct dash backlight wire? If there isn't an OEM factory fitted stereo one you can take from another switch or gauge on the dash, headlights/parklights. For the purposes of the testing you should be able to use any 12 volt signal to confirm that the feature works on the headunit and there isn't a warranty claim fault.

If the factory stereo connection plugs are still in place I suggest checking the Aepro brand website for the matching wiring harnesses to suit your vehicle and stereo (can't help you here as you haven't provided any details) and purchasing those, then it's plug in and play.

It was done before he got it but yes they should have done a better job.

Sorry guys, would have been good to include relevant information.

Discovery 3, 2007 MY08 SE.

I have the Pioneer AVH Z-5050BT.

I have the Aerpro step 2 harness, we discussed the step one at length at Autobarn/SuperCheap as the Aerpro website only lists step 1 for steering wheel controls, which we don't have. So we grabbed the T harness instead which does work, except for the power and the dimming.

What should I look for to determine whether or not I need to worry about the fibre?

Thanks for your responses so far, I guess I am trying to work out if I get the step 1 listed even without the steering controls.

Michael

FWIW,

it seems most generic non-oem radios have the following:

yellow - permanent 12v
red - ign switched 12v
orange - radio dimmer when connected to dash lights
blue - pwr antenna

Obviously no guarantee that this is correct for your after market setup but hth