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Head unit won't turn off.....plz help asap

By nikefans · Oct 14, 2008in Problems/Troubleshooting💬 32 posts👁️ 5,032 views
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Posted Oct 14, 2008 · 21:19 UTC#1

First time installing a headunit ... everything works fine until ... when i turn off my car, the HU doesn't turn off...

the harness that I bought has some brown wire without label so i dont knwo what they are for. there's a total of 5 brown wires..

My F90bt has a Red wire label ACC and the RED wire on he harness is ignition 12V.. and i connected them together and i think that might be the problem .. is it? any pro can help me out plz....

Posted Oct 15, 2008 · 04:33 UTC#2

The red wire needs to be connected to a switched 12 volt power source. Sounds to me like it's connected to a constant power source. Did the wiring harness you bought come with a wiring diagram that said what each wire was or is the writing on the wires?

Posted Oct 15, 2008 · 04:53 UTC#3

i have no idea which wire is for ACC which one is for battery

 

the plug from the car has 2 red/yellow wire that's possibly the power source.. but it doesn't stats which one is which... and my harness has a red wire and a yellow wire and 5 brown wires that doesn't tell me what they are suppose to be...

Posted Oct 15, 2008 · 05:12 UTC#4

Let's start at the beginning. What kind of car do you have? Did you buy a harness specific for your car? Because if you're trying to match the Pioneer harness colors to the color of the wires on your factory harness you're going to have several issues.

 

There are female harnesses that plug directly into your cars harness with standard colored wires coming off. Then there is the male harness that plugs into the avic (this came with your HU) that has those same standard colors. You match those colors up and tada, it works. 5 brown wires make me thing you're trying to tap into your factory wiring or you have some sort of amplifer bypass harness. I'm puting my money on the former. In any event, you might just need to take it to a professional if you're in over your head. Spending the $45 might be worth not ruining your brand new $900 HU.

Posted Oct 15, 2008 · 05:24 UTC#5

this is the harness that i bought , it has a red and yellow wire yellow says battery, red says 12v ignition, and on the the wires that came from the HU, red one says ACC .. yellow one says +Battery. and the harness i bought has 5 brown wire that doesn't lable anything... i just match them colro to color and then it worked but it doesn't turn off ... i disconnected either the red or the yellow it won't turn on at all ... if i wire the red to yellow and the yellow to red .. it work too ... just won't turn off the same way ...

post-23599-12872755833617_thumb.jpg

Posted Oct 15, 2008 · 05:25 UTC#6

Test the wires coming from the car. Go to your local Wal*Mart or Pep boys and pick up a light tester for $10. Find a wire that turns on only when the ignition is on and connect the ACC wire to that. Find a wire that has constant power and connect the yellow wire to that. Problem solved.

 

PS: Twisting and taping is not a secure connection. Get some connectors too.

Posted Oct 15, 2008 · 05:30 UTC#7

oh and i have a 2007 GTI

Posted Oct 15, 2008 · 05:31 UTC#8

Yeah, those aren't very secure for the wires to be just twisted and taped.

 

You need either crimping connectors or wrapped in heat shrink.

 

From a random internet source...

 

heat-shrink-large-piece-of-wire.jpg

Posted Oct 15, 2008 · 05:42 UTC#9

Solder your connections, then you'll never have to worry. And crimpers are mostly crap because people don't ever purchase the right size ones for the wires they are trying to connect and don't use the correct crimping tool. Needle nose pliers don't do the job correctly.

 

I'm a few years removed from installing but that looks like some sort of german harness (VW, BMW). It looks like it's for an amplified system. Is your car amplified?

Posted Oct 15, 2008 · 05:45 UTC#10

There's a few ways to make a secure connection, but that's not what he's asking for. I was simply pointing it out from his picture.

 

Nikefans, from that picture you provided, I only see 1 Red wire and 1 yellow wire, each coming from the unit and the vehicle harness. Red to Red and Yellow to yellow. It even says on the yellow wire "12VOLTBATTERYCONSTANT". If there are more red and yellow wires on that harness, which I thought I saw you mention in your first post, then there should be some kind of diagram that came with the harness. But yellow and red should never come in contact with each other.

Posted Oct 15, 2008 · 05:48 UTC#11

that's how i did at first red to red, yellow to yellow .. but then everything works well until i turn off the ignition ... the unit won't turn off....

Posted Oct 15, 2008 · 05:51 UTC#12

Just going to eliminate the most obvious possibility here, but did you try turning it off then opening your driver's side door? Some cars keep the radio on until you open the door..

Posted Oct 15, 2008 · 05:54 UTC#13

i didn't even close my door the whole time, once i plug the harness in, the system starts right away. im so frustrated now.

Posted Oct 15, 2008 · 05:56 UTC#14

the harness from my car doesn't have a red or a yellow wire, it has 2 red/yellow wire which didn't label as ACC/ignition/power/battery/constantsource or stuff like that... i was hoping i can just match the color from the factory harness .. but .. no hope.

Posted Oct 15, 2008 · 05:57 UTC#15

OK then you should sleep on it. Getting frustrated gets nothing accomplished and can lead to more mistakes. My best advice to you would be to get to wal*mart or pep boys and buy a light tester. When you do, you can plug in the harness to the car by itself and test each wire individually to find one that is ignition powered. That will be the ACC wire.

Posted Oct 15, 2008 · 14:34 UTC#16

oh ok, I missed where you said you have a gti. Many volkwagens have no accessory wire behind the radio, you need to tap one near the ignition. Whatever wire you tapped thinking it was an acc wire is a constant wire and that's why it won't shut off.

 

I'm sure if you search google you find a suitable wire to tap.

Posted Oct 15, 2008 · 16:14 UTC#17

Does the cigarette lighter/power port only work when the car is on? If so, that is a suitable place to tap into to get a switched power source for the red wire.

Posted Oct 15, 2008 · 16:25 UTC#18

That can work but I've seen it pop fuses a lot with regular hu's. I'd imagine the avic would draw a bigger current. The ignition is always a good source, I forgot to mention you definitely need to fuse it if you tap it there.

Posted Oct 15, 2008 · 19:18 UTC#19

tap it to the ignition ... that's way too technical for me ...

Posted Oct 15, 2008 · 19:28 UTC#20

You're car doesnt have a switched 12v in the harness, not sure why the harness you bought has one. Most people tap into a fuse in the fuse box which turns off with the ignition (e.g. wipers). Just curious, did you connect your speed sensing wire, reverse wire, etc? If not, you should look into buying a product called CR2-VW from PAC. It will replace the other harness that you bought (maybe you can return that one?) and will give you EVERYTHING that you need, including the ACC, illumination, parking brake, reverse, and speed pulse. Enfig.com sells it for about $70.

 

EDIT

I meant C2R-VW. Heres the link:

http://enfigcarstereo.com/shopsite_sc/s ... 2R_VW.html

 

It will make everything super simple, and it has a plug to directly connect the SWI-CAN if you want to retain your steering wheel controls

Posted Oct 15, 2008 · 23:53 UTC#21
You're car doesnt have a switched 12v in the harness, not sure why the harness you bought has one. Most people tap into a fuse in the fuse box which turns off with the ignition (e.g. wipers). Just curious, did you connect your speed sensing wire, reverse wire, etc? If not, you should look into buying a product called CR2-VW from PAC. It will replace the other harness that you bought (maybe you can return that one?) and will give you EVERYTHING that you need, including the ACC, illumination, parking brake, reverse, and speed pulse. Enfig.com sells it for about $70.

 

EDIT

I meant C2R-VW. Heres the link:

http://enfigcarstereo.com/shopsite_sc/s ... 2R_VW.html

 

It will make everything super simple, and it has a plug to directly connect the SWI-CAN if you want to retain your steering wheel controls

 

no i didn't have all those things that u mentioned connected. So if i bought the C2R-VW ... i can just connect everything color to color with somewhere that i can connect the ACC wire and the orange wire that i dont know where to connect? does it come with instructions?

Posted Oct 16, 2008 · 02:03 UTC#22

Actually the instructions are here:

http://enfigcarstereo.com/shopsite_sc/s ... CTIONS.pdf

 

I dont think the reverse, speed pulse, illumination, etc are color coded the same as the pioneer, but they are labeled so its easy enough to match up. The orange wire that you couldnt hook up is the illumination wire (which will dim the screen when your lights are turned on), so you will have that, along with the red ACC wire with the C2R-VW.

Posted Oct 16, 2008 · 03:55 UTC#23

what are the other 2 wire for steerying wheel control?

 

SWI-CAN and what ?? are they both plug and play easy .. do they come with instructions? is my bluetooth button going to work with the headunit too ?

Posted Oct 16, 2008 · 05:01 UTC#24

The small plug is to connect to the SWI-CAN and the other set of wires is not used. I believe PAC uses them to upgrade the firmware if one becomes available. For the SWI-CAN, you will also need the SWI-PS which connects directly to the Pioneer. So it would go:

 

Factory Harness > C2R-VW > SWI-CAN > SWI-PS > F90BT

 

All plug and play as far as i know. Here are the instructions for the SWI:

 

http://www.pac-audio.com/instructions/s ... 20rev2.pdf

 

In there where it shows "Chrysler, Dodge, Jeep usign C2R-CHRY", that also applies to VW using the C2R-VW.

Posted Oct 16, 2008 · 06:07 UTC#25

alrighty, here's a heads up for you... and will solve all the confusion...

 

VWs don't have switched accessorys. So the Red wire is working perfectly... according to VW. What you'll need to do is buy an external switch and manually turn on the deck every time you turn on the car. It's a shitty way of doing it but sorry about your VW.

 

oh, and yes, that is a terrible tape and connection job.. just because the ends of the harnesses are stripped back 1/4" doesn't mean that you can't use more of the wire. Use some wire strippers to strip back around a full 1" to 1 1/2" per side to twist together. Use some HIGH QUALITY 3M temflex tape to wrap the connections. Forget the term "less is more" when taping. Get a good length and wrap it tightly.

 

you won't need heat shrink if you have good enough electrical tape.

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