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AVIC-F Hardwire Bypass for Dummies

By Maverickster · Nov 26, 2008in Hacks/Mods💬 142 posts👁️ 82,859 views
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Posted Dec 28, 2009 · 03:52 UTC#126

Yeah, it's a little hard to see, but it's the only picture I could find anywhere that illustrated the whole bypass "finished". It goes off to the left, but it doesn't connect to the block with the yellow wire on the top. If you look on the left, you'll see the radio's ground with two black wires coming off of it. One of them is longer and runs towards the top of the table; the other is shorter and goes off to the left; that second one is connected to the other end of the light green wire. If you look close, you can see it and follow it all the way back to where the mute wire and brake wire are joined.

 

Beating a dead horse here, I know, but I had this bypass briefly working and then it stopped. Redid everything again and success is intermittent. In this statement, you say you have the parking brake wire and newly located mute wire joined to a third dark green wire. When you say "radio's ground" are you referring to the one from from the radio itself. I assume, if this is so, that you have the second wire from the radio's ground connected to the third green dark wire and the radio's ground connected to the car's wiring harness ground. What I was doing was taking all four, p-brake, mute, radio ground and car ground and running them into a wire nut. Does resetting have any effect? Would the safest way be to ground seperatly all three wires from the radio; p-brake, mute and from radio ground? Thanks and I don't know why this such a PTIA. It seems simple enough.

Posted Dec 28, 2009 · 04:07 UTC#127
What I was doing was taking all four, p-brake, mute, radio ground and car ground and running them into a wire nut. Does resetting have any effect? Would the safest way be to ground seperatly all three wires from the radio; p-brake, mute and from radio ground? Thanks and I don't know why this such a PTIA. It seems simple enough.

It's really this simple.

Take the following wires from the AVIC:

*parking brake

*moved mute wire

*AVIC black ground wire

and connect them to the normally black chassis ground that comes from the car harness.

it really is that simple, if you're having issues, then you have a connection problem, and the most frequent one is issues with folks butchering the mute wire when moving it..

Posted Dec 28, 2009 · 06:23 UTC#128

It's really this simple.

Take the following wires from the AVIC:

*parking brake

*moved mute wire

*AVIC black ground wire

and connect them to the normally black chassis ground that comes from the car harness.

it really is that simple, if you're having issues, then you have a connection problem, and the most frequent one is issues with folks butchering the mute wire when moving it..

 

I realize how simple it is and have had it working consistently (over a drive), then out of nowhere it stops. To fix it , I play with the two grounds and P-brake and mute and get it working again briefly. I do not believe it is the mute wire b/c I have not touched it since install and have gotten the bypass to work. I can't check the radio side of the mute wire anyways b/c a screw has worked itself loose from the indash kit and now the whole radio is jammed so I would have to remove the dash to remove the stereo. Arrrgh. I am going to test making a seperate ground for the two.

Posted Dec 28, 2009 · 06:52 UTC#129

I can almost assure you it is the mute wire. It almost always is.

Posted Jan 03, 2010 · 05:11 UTC#130

I installed F500BT today (actually, last two days... I had to get some extra parts) :)

Anyways, I drove around town today and I saw a message that p-brake wire is not installed properly. huh? I grounded.

 

The unit is running version 2.006.

Thanks,

Posted Jul 08, 2010 · 02:42 UTC#131

Well I am getting the error message and did not do a bypass at all, i connected the parking brake wire to the green parking brake wire that came off the GMOS-04 adapter and got a message a week later that parking lead was not connected correctly.

I am trying to follow the pictures to do the bypass but from the picture the light green wire is connected to black ground on one end and yellow mute on the other, that makes no sense, od did u just tap the mute wire into the middle of the light green wire? u say light green wire and yellow mute connected to light green wire , so connected to itself? confusing :)

Posted Jul 08, 2010 · 02:46 UTC#132

There's this thread you're replying to, and a sticky. If yo can't folow it, don't do it. It's extremely basic.

 

As I told you in your other thread, you aren't connecting the parking brake to anything. You're connecting it to the parking break wire on some factory adapter harness, not the actual parking brake lead.

 

Install it correctly and it'll work. If you can't do it yourself, take it to an installer and pay them. End of discussion.

Posted Jul 08, 2010 · 02:52 UTC#133
There's this thread you're replying to, and a sticky. If yo can't folow it, don't do it. It's extremely basic.

 

As I told you in your other thread, you aren't connecting the parking brake to anything. You're connecting it to the parking break wire on some factory adapter harness, not the actual parking brake lead.

 

Install it correctly and it'll work. If you can't do it yourself, take it to an installer and pay them. End of discussion.

hmm u got a point there, but since the adapter is made just for that car and the radio, i assumed their green parking cable then connects to car's harnace which should in effect connect the light green to gmos green wire to the correct location eliminating any errors. i did not ask for help on this here, just about the diagram for the bypass which i might attempt, if u are not helping why thread crap at all?

Posted Jul 08, 2010 · 03:15 UTC#134

because you aren't following.

 

If you're trying to connect the parking brake wire from the avic, it's not in the factory radio harness.

 

If you're trying to do the bypass, move the mute wire, connect it and the parking brake wire to ground.

 

Not a big deal, nor is it rocket science. It has, however, been covered so much on this forum that the whole topic is just a pile of covers now.

 

Not thread crapping. Pointing out what you're failing to grasp.

 

Also, why did you reply to a thread that's been dormant for 7 months, instead of the sticky at the top of this forum dealing with the exact same thing?

Posted Jul 08, 2010 · 03:17 UTC#135
because you aren't following.

 

If you're trying to connect the parking brake wire from the avic, it's not in the factory radio harness.

 

If you're trying to do the bypass, move the mute wire, connect it and the parking brake wire to ground.

 

Not a big deal, nor is it rocket science. It has, however, been covered so much on this forum that the whole topic is just a pile of covers now.

 

Not thread crapping. Pointing out what you're failing to grasp.

 

Also, why did you reply to a thread that's been dormant for 7 months, instead of the sticky at the top of this forum dealing with the exact same thing?

 

I feel your pain. I can't imagine how to make it any clearer than it already is.

Posted Jul 08, 2010 · 14:39 UTC#136

If you're trying to connect the parking brake wire from the avic, it's not in the factory radio harness.

I only replied to this thread because it seemed to have done a much better job with the pics, the sticky is a half job done. I did not realize its illegal here to reply to old posts.

I perfectly understand what you are trying to say, its just that it makes no sense to me. Metra who makes the GMOS adapter has a cable thats designated to be connected to the Avic parking brake wire (light green). If what you are saying is correct then they are shipping units and instructions that are incorrect and in effect the wire goes no where. Everyone following their directions should be getting an error on their units, is this the case ?

Posted Jul 08, 2010 · 15:02 UTC#137

I'm saying that unless there's a wire spliced into the parking brake on your H3, then run into the factory harness that the metra kit is connecting to, I don't care what the instructions say, it's incorrectly connected.

 

Are you starting to grasp this yet, as the cause of the "Incorrectly connected brake wire" error you're having? :roll:

Posted Jul 08, 2010 · 16:18 UTC#138

if you said that from the start it would have been clear right away :)

but then how is it that bypassing the system does not generate the error? obviously by doing the bypass you are incorrectly connecting the parking brake cable so what gives? or does grounding it fools the system into thinking its ok ?

Posted Jul 08, 2010 · 16:37 UTC#139
if you said that from the start it would have been clear right away :)

but then how is it that bypassing the system does not generate the error? obviously by doing the bypass you are incorrectly connecting the parking brake cable so what gives? or does grounding it fools the system into thinking its ok ?

 

When doing a hardware bypass, you're grounding the AVIC parking brake lead, which is technically what connecting it correctly does when the parking break is set.

 

However, you need to move the mute wire from it's stock location in the AV harness as outlined in the guide(s) here in order to actually complete this.

 

It's ok to connect the relocated mute wire, the AVIC parking brake wire, and the ground wire in the f700 harness together to the factory ground on the car specific harness, most of the time. If it still functions incorrectly and you're SURE the mute wire was relocated properly, you'll have to find an alternate ground.

Posted Jul 08, 2010 · 17:01 UTC#140
When doing a hardware bypass, you're grounding the AVIC parking brake lead, which is technically what connecting it correctly does when the parking break is set.

 

However, you need to move the mute wire from it's stock location in the AV harness as outlined in the guide(s) here in order to actually complete this.

 

It's ok to connect the relocated mute wire, AVIC parking brake lead, and the ground wire in the f700 harness together to the factory ground on the car specific harness, most of the time. If it still functions incorrectly and you're SURE the mute wire was relocated properly, you'll have to find an alternate ground.

FYP

We have to be careful in the noob threads to not confuse them when they're already "not getting it" because simply horrible things happen when they ground the cars actual parking brake lead..

 

....just saying...

Posted Jul 08, 2010 · 17:09 UTC#141
When doing a hardware bypass, you're grounding the AVIC parking brake lead, which is technically what connecting it correctly does when the parking break is set.

 

However, you need to move the mute wire from it's stock location in the AV harness as outlined in the guide(s) here in order to actually complete this.

 

It's ok to connect the relocated mute wire, AVIC parking brake lead, and the ground wire in the f700 harness together to the factory ground on the car specific harness, most of the time. If it still functions incorrectly and you're SURE the mute wire was relocated properly, you'll have to find an alternate ground.

FYP

We have to be careful in the noob threads to not confuse them when they're already "not getting it" because simply horrible things happen when they ground the cars actual parking brake lead..

 

....just saying...

 

fixed my original post. Sorry, reached the end of my chain with this one and wanted to get that post out and be done with it.. :lol:

Posted May 15, 2012 · 18:06 UTC#142

Hey, Mav, did your work around on my F700, worked like a champ. many thanks for taking the time to make this mod idiot proof. keep up the great work.

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