Nissan Frontier Forum banner
1 - 13 of 13 Posts

·
Registered
Joined
·
39 Posts
Discussion Starter · #1 ·
To start this post I’d like to add that I just installed a new pioneer single din radio to the truck and I’m pretty sure that is where this problem stemmed from but it could just be coincidence.

key out of ignition light switch in the off position and the dash lights will stay on, put the light switch to day time on mode and the dash lights turn off and radio turns on. Also if lights for truck are turned on the dash lights will also stay off
 

·
Registered
Joined
·
39 Posts
Discussion Starter · #3 ·
You answered your own question.
Re-trace your work, especially any splices or power connections which could be incorrect..
My first quest is that the constant and ignition wires are backwards. I took out the radio in my works parking lot and the lights were still on with ignition off so those wires must still have power somehow, had to disconnect the battery and go into work, will update when I can work on it later
 

·
Registered
Joined
·
686 Posts
I'm NO Car Audio Specialist, but I have wired up several car audio & alarm systems in the past. From what I remember from years ago, various forum members, (from different car forum groups I belonged to over the years), would connect all the wires on the aftermarket radio harness to their car stereo and then plug it into the STOCK OEM vehicle harness. They would unintentionally wire in the positive 12 volt Turn-On-Power wire coming out of the car stereo to the aftermarket radio harness. They would then connect radio harness into the STOCK OEM vehicle harness. If the car/truck didn't have a STOCK OEM amp or STOCK OEM power antenna installed in it, the extra wire they connected from the car stereo to the aftermarket radio harness would cause a problem with the vehicle illumination system. Some aftermarket wiring harnesses weren't clear on their installation instructions. Usually it was the Blue Illumination wire on the aftermarket wiring harness that caused the issue.

Not sure which aftermarket harness you are using, but you might be backfeeding power into your truck's illumination circuit causing your issues. Try disconnecting the following wires coming our of your car stereo where it connects to the aftermarket radio harness one at a time. 1). BLUE wire - Car Radio Accessory Switched 12v+ Wire - supposed to be used as a power antenna turn on / amplifier turn on. 2). Red/Blue - Car Radio Illumination wire & 3). Red/Yellow - Car Stereo Dimmer Wire. One of these three wires is the source of your problem.

Check the colors for the wiring harness here.

You can also check the Nissan Factory Service Manual for the OEM colors for the radio circuit:

Anyhow hope this helps....
 

·
Registered
Joined
·
39 Posts
Discussion Starter · #5 ·
does anyone know where to
I'm NO Car Audio Specialist, but I have wired up several car audio & alarm systems in the past. From what I remember from years ago, various forum members, (from different car forum groups I belonged to over the years), would connect all the wires on the aftermarket radio harness to their car stereo and then plug it into the STOCK OEM vehicle harness. They would unintentionally wire in the positive 12 volt Turn-On-Power wire coming out of the car stereo to the aftermarket radio harness. They would then connect radio harness into the STOCK OEM vehicle harness. If the car/truck didn't have a STOCK OEM amp or STOCK OEM power antenna installed in it, the extra wire they connected from the car stereo to the aftermarket radio harness would cause a problem with the vehicle illumination system. Some aftermarket wiring harnesses weren't clear on their installation instructions. Usually it was the Blue Illumination wire on the aftermarket wiring harness that caused the issue.

Not sure which aftermarket harness you are using, but you might be backfeeding power into your truck's illumination circuit causing your issues. Try disconnecting the following wires coming our of your car stereo where it connects to the aftermarket radio harness one at a time. 1). BLUE wire - Car Radio Accessory Switched 12v+ Wire - supposed to be used as a power antenna turn on / amplifier turn on. 2). Red/Blue - Car Radio Illumination wire & 3). Red/Yellow - Car Stereo Dimmer Wire. One of these three wires is the source of your problem.

Check the colors for the wiring harness here.

You can also check the Nissan Factory Service Manual for the OEM colors for the radio circuit:

Anyhow hope this helps....
The aftermarket radio I have is a pioneer MVH-S21BT coming out of the new radio is a
black (ground), yellow(constant), red(ignition) and blue/white (remote control system)

From my factory harness I have four wires
red/yellow (constant), green/red (ignition), blue/red(interior lights), and pink/red( interior lights)

I didn’t have a wire diagram going into this project but have sense found a copy of my oem and the pioneers. Originally I wired the red/yel and the pink/red together and the green/red and blue red together which gave me the constant dash lights with ignition off key out.

I have tried to wire both interior light wires to the ignition and that does not allow me to have any interior lights

I have also tried not wiring them in with the same effect I’ve tried interior lights to the system remote wire as well with no success.

any ideas as to where I could try next would be helpful.

more background information the yellow red has constant 12v with engine off. The green red has 12v with acc or ignition on. And the two interior light wires only get 12v when I turn the light switch on for dash lights. My vehicle is a 2001 Nissan FrontierXe it had a single fin radio with CD player originally, it is a manual 4 cylinder engine not sure if that is helpful or not
 

·
Registered
Joined
·
3,968 Posts
any ideas as to where I could try next would be helpful.

My vehicle is a 2001 Nissan FrontierXe it had a single fin radio with CD player originally, it is a manual 4 cylinder engine not sure if that is helpful or not
Older stereos had illumination bulbs that turned on when the dash lights illumination lights were on. Modern stereos use LEDs and do not get connected to the illumination wire in the Frontier's harness, that wire is just taped off.
 

·
Registered
Joined
·
39 Posts
Discussion Starter · #7 ·
Older stereos had illumination bulbs that turned on when the dash lights illumination lights were on. Modern stereos use LEDs and do not get connected to the illumination wire in the Frontier's harness, that wire is just taped off.
If I leave the wires disconnected my dash lights will not work I’ve tried
 

·
Registered
Joined
·
3,968 Posts
If I leave the wires disconnected my dash lights will not work I’ve tried
I meant to connect the illumination wires but NOT the illumination wire of the stereo.
 

·
Registered
2004 Nissan Frontier XE KC KA24DE
Joined
·
4,680 Posts
Make it easier and use a aftermarket wiring wiring harness.
The blue/white is only used if you have a amplifier or power antenna.
Networking cables Font Line Cable Data transfer cable
Product Font Line Material property Parallel
 

·
Registered
Joined
·
15 Posts
I have the same issue on my 99 4x4. It has a stock head unit. In my experience in vehicles past , this can be from a worn out ignition cylinder. Mine you can actually take the key out sometimes and accidentally leave it running. The stereo could be at fault too, but if all that checks out, may be time for a new ignition cylinder.
 

·
Registered
2004 Nissan Frontier XE KC KA24DE
Joined
·
4,680 Posts
I have the same issue on my 99 4x4. It has a stock head unit. In my experience in vehicles past , this can be from a worn out ignition cylinder. Mine you can actually take the key out sometimes and accidentally leave it running. The stereo could be at fault too, but if all that checks out, may be time for a new ignition cylinder.
There could be a problem with your key interlock system.
 
1 - 13 of 13 Posts
Top