ok so i have had my headunit installed on my car for about amonth now. i have a panasonic cq-vd6506u and the gmrc-lan-03 wiring harness for my 08 G5 GT. now it has worked fine up until now. i went to the beach this weekend and it worked great all day friday and saturday. then it worked all day sunday until i stopped to eat and when i got out of the restaurant my HU would not turn on. the code security light at the bottom was flashing put no sound or picture on the HU. i just plugged in my stock headunit and i got sound and everything. something is disconnected on my HU i think or possibly a blown fuse.

any ideas? or does anyone have any wiring diagrams?

i have this PDF file for the harness http://www.installer.com/pdf/gmrc-lan-03.pdf

i checked the fuse on the back of the HU and it didn't look blown and since the stock unit worked i know the fuse in the car for the audio system isn't blown.

bump need the help

bump...

 

Do you have a DMM (multi-meter)?

You might need to see if your getting switched power (red wire). I have messed with the lan-03 alot cuz its what we sell at my work, and I have see these come back with this issue.

 

ya so i just need to check to see if i'm getting power through the red wire when the radio is supposed to be on correct?

 

bump anyone

 

thats correct

 

ok so no power is coming through the red wire at all. but my red wire is wired from the back of the headunit to the chime box and thats it. it doesn't even come from the part of the harness that plugs into what normally plugs into the back of your stock unit. so i d/k how power would come through that anyways.

 

That chime box makes switched power from a data signal from the car. You can do two things get a new lan-03 or something like it, or bypass the module and get switched power from somewhere else.

 

how would i go about bypassing it? could i just wire it into the yellow (power) wire or would that leave it on constantly?

 

That would leave it on constantly. The best spot is gonna be at the fuse panel that's in the car. Your gonna have to meter the wire to find it (I would). I believe its gonna be a larger gauge pink wire, top row of a large red connector.

 

The wiper fuse in the panel by the passenger feet is what i used

 

^ Im not a fuse tap kinda guy, not how I was taught. but that does work.

 

so the large pink wire is connected to the back of my fuse box that's inside the car on the passenger side floor board? and i would just have to tap my red (ACC) wire into this pink wire or whatever color it is?
so just take the red (ACC) wire and run it through where the fuse is basically? like put it inbetween the two prongs of the fuse and plug the fuse back in?

 

You could do that or find a wire that has power with the key on only and splice that and do a good connection to it...

 

Not on the back but the front or the side you see right as you pop the cover off. Yes you connect the ACC or red wire from your radio harness.





He has a 08 that should all be data going to the key.

 

now if i were to splice my ACC wire into this Pink wire and something were to short out would i lose everything in my fuse box that that pink wire powers?

oh and i went to best buy today to test the headunit and it still worked fine. he told me it was the wiring going into the chime box that is messing everything up.