Jb4 Confusion

Karman · 02-05-2013, 01:38 PM

So i went to do the install today after class and saw that i already have had something installed ....the black removable piece [IMG]file:///Users/Karman/Desktop/JB3-Double-Plug.jpg[/IMG] says 2.0 on it in black sharpie the board i just purchased says jb4 on it...i switched the two boards... is this safe? also this isnt working for me

http://www.youtube.com/watch?feature...&v=HDjD4OcDIGU

i still have the car opened up so if anyone can let me know what to do (if that is the correct way to install)..thanks!!

Karman · 02-05-2013, 01:42 PM

also i want to know which forum member had my car before me! lol this is the second mod that i was planning on doing but has already had been done.

Manuts · 02-05-2013, 01:47 PM

If you currently have an JB3, you need to modify the harness in order to install the JB4. You also need to install a power wire. See link below

http://www.e90post.com/forums/showthread.php?t=489350

idrift4wd · 02-05-2013, 03:51 PM

Quote:

Originally Posted by Manuts

If you currently have an JB3, you need to modify the harness in order to install the JB4. You also need to install a power wire. See link below

http://www.e90post.com/forums/showthread.php?t=489350

This.

i would take out the existing harness as it will not work with the new JB4 unit. use the Jb4 harness that you should have gotten with your jb4. jb4 are will not work if you dont have the right harness.

ErvGotti · 02-05-2013, 03:54 PM

You need just need to completely remove the old JB unit and install the new unit accordingly. Problem solved close thread.

Karman · 02-05-2013, 06:58 PM

Yes correct. To anyone doing this install disconnect the battery! And make sure you connect the pins correctly

Laguna Seca Blue · 02-05-2013, 08:11 PM

Quote:

Originally Posted by Karman

Yes correct. To anyone doing this install disconnect the battery! And make sure you connect the pins correctly

Why did you you need to disconnect your battery? Do you have comfort access? When I installed my Procede, I just locked my car. That should turn power to the DME 100% off.

Madill21 · 02-05-2013, 08:22 PM

If you have CA open the hood, close all the doors, lock the car, put key fob inside. Wait 10 mins for the DME to go to sleep and feel free to remove old harness and install new one.

Other members are right. Take that one out, I would not try to run the car with the old harness and new JB4 board plugged in.

It's an easy way install. Keep us updated man, you'll love the JB4!

Karman · 02-05-2013, 08:45 PM

Just installed guys. Your right you don't Neccesarily have to disconnect the battery. It's just I didn't and I connected the pins incorrect. This gave a ses light. But after driving around and resetting codes. The light is gone...it's snowing now so have t really got a chance to test it out yet.

02-05-2013, 01:38 PM	#1
Karman Second Lieutenant 22 Rep 274 Posts Drives: 335i e92 07 space gray Join Date: Jan 2013 Location: CT iTrader: (0)	Jb4 Confusion So i went to do the install today after class and saw that i already have had something installed ....the black removable piece [IMG]file:///Users/Karman/Desktop/JB3-Double-Plug.jpg[/IMG] says 2.0 on it in black sharpie the board i just purchased says jb4 on it...i switched the two boards... is this safe? also this isnt working for me http://www.youtube.com/watch?feature...&v=HDjD4OcDIGU i still have the car opened up so if anyone can let me know what to do (if that is the correct way to install)..thanks!!
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02-05-2013, 01:42 PM	#2
Karman Second Lieutenant 22 Rep 274 Posts Drives: 335i e92 07 space gray Join Date: Jan 2013 Location: CT iTrader: (0)	also i want to know which forum member had my car before me! lol this is the second mod that i was planning on doing but has already had been done.
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02-05-2013, 01:47 PM	#3
Manuts Private 3 Rep 57 Posts Drives: 328i Join Date: Mar 2012 Location: SoCal iTrader: (0)	If you currently have an JB3, you need to modify the harness in order to install the JB4. You also need to install a power wire. See link below http://www.e90post.com/forums/showthread.php?t=489350
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02-05-2013, 03:54 PM	#5
ErvGotti Major 124 Rep 1,362 Posts Drives: 2008 135i 6MT Join Date: Jul 2010 Location: Aviano iTrader: (5) Garage List 2008 135i [6.00]	You need just need to completely remove the old JB unit and install the new unit accordingly. Problem solved close thread.
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02-05-2013, 06:58 PM	#6
Karman Second Lieutenant 22 Rep 274 Posts Drives: 335i e92 07 space gray Join Date: Jan 2013 Location: CT iTrader: (0)	Yes correct. To anyone doing this install disconnect the battery! And make sure you connect the pins correctly
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02-05-2013, 08:22 PM	#8
Madill21 Private 15 Rep 79 Posts Drives: '08 335i - BMS DCI, JB4 Join Date: Oct 2012 Location: Dallas, Ga iTrader: (0)	If you have CA open the hood, close all the doors, lock the car, put key fob inside. Wait 10 mins for the DME to go to sleep and feel free to remove old harness and install new one. Other members are right. Take that one out, I would not try to run the car with the old harness and new JB4 board plugged in. It's an easy way install. Keep us updated man, you'll love the JB4! __________________ J.D. 2008 335i - JB4 / BMS DCI / Premium Package / Sport Package / 6AT
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02-05-2013, 08:45 PM	#9
Karman Second Lieutenant 22 Rep 274 Posts Drives: 335i e92 07 space gray Join Date: Jan 2013 Location: CT iTrader: (0)	Just installed guys. Your right you don't Neccesarily have to disconnect the battery. It's just I didn't and I connected the pins incorrect. This gave a ses light. But after driving around and resetting codes. The light is gone...it's snowing now so have t really got a chance to test it out yet.
	Appreciate 0 Quote