jb4 harness installed without board

e90ca · 04-28-2016, 01:39 PM

Does anyone know if the jb4 harness can be plugged into all the connections but does not have the board connected?

the reason I'm asking is because its confirmed that my board is faulty and I am sending it back to bms to be checked out. Also, the boost connection is difficult for me to reach so I'm hoping to be able to leave it all in place.

Or do I need to unplug the whole thing, and reinstall after I get the board back?

shauns4 · 04-28-2016, 03:09 PM

You would need the board installed for it to run or just pull the harness until you get the board back.

Secret_Asian · 04-28-2016, 05:04 PM

I wish they would make a bypass connector that would complete the circuit for the plugs so we can remove the jb4 and install the bypass and not have to dig in to unplug the flexfuel connector which is a pain to get to the rest are easy

mike@x-ph.com · 04-28-2016, 05:15 PM

Quote:

Originally Posted by e90ca

Does anyone know if the jb4 harness can be plugged into all the connections but does not have the board connected?

the reason I'm asking is because its confirmed that my board is faulty and I am sending it back to bms to be checked out. Also, the boost connection is difficult for me to reach so I'm hoping to be able to leave it all in place.

Or do I need to unplug the whole thing, and reinstall after I get the board back?

Never tried it but I strongly recommend you just remove the whole thing

e90ca · 04-28-2016, 06:07 PM

Quote:

Originally Posted by mike@x-ph.com

Never tried it but I strongly recommend you just remove the whole thing

Yeah, i'm having trouble reaching the boost solenoid connection. So if I can get another board to just stick it in its place until I get my other board back, I'll just do that instead, so its easier for me.

I already have the JB4 set to Map 0 so its disabled anyways, so should be ok right?

LGCubana · 04-29-2016, 08:04 AM

No,

Without the board, you have (in an overly generalized statement) an open circuit.

Quote:

Originally Posted by e90ca

Yeah, i'm having trouble reaching the boost solenoid connection. So if I can get another board to just stick it in its place until I get my other board back, I'll just do that instead, so its easier for me.

I already have the JB4 set to Map 0 so its disabled anyways, so should be ok right?

sd306 · 04-30-2016, 12:54 AM

Quote:

Originally Posted by LGCubana

No,

Without the board, you have (in an overly generalized statement) an open circuit.

Quote:

Originally Posted by e90ca

Yeah, i'm having trouble reaching the boost solenoid connection. So if I can get another board to just stick it in its place until I get my other board back, I'll just do that instead, so its easier for me.

I already have the JB4 set to Map 0 so its disabled anyways, so should be ok right?

Yep ^

e90ca · 04-30-2016, 11:30 PM

Quote:

Originally Posted by LGCubana

No,

Without the board, you have (in an overly generalized statement) an open circuit.

Thanks for the confirmation. Makes sense now in the words you used.

Rob_BMW_PNW · 05-01-2016, 03:59 AM

I tried this
doesnt work
Need to remove everything

04-28-2016, 01:39 PM	#1
e90ca Captain 88 Rep 671 Posts Drives: 2011 335i M-Sport Join Date: Mar 2007 Location: Pleasanton, CA iTrader: (12)	jb4 harness installed without board Does anyone know if the jb4 harness can be plugged into all the connections but does not have the board connected? the reason I'm asking is because its confirmed that my board is faulty and I am sending it back to bms to be checked out. Also, the boost connection is difficult for me to reach so I'm hoping to be able to leave it all in place. Or do I need to unplug the whole thing, and reinstall after I get the board back? __________________ 2011 335i with M-Sport Performance package, Carbon Fiber interior trim, gloss black kidney grills. 18" Apex Arc-8, JB4, ETS Charge pipe
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04-28-2016, 03:09 PM	#2
shauns4 New Member 2 Rep 23 Posts Drives: 2011 335i xdrive Join Date: Apr 2014 Location: concord, nc iTrader: (1)	You would need the board installed for it to run or just pull the harness until you get the board back.
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04-28-2016, 05:04 PM	#3
Secret_Asian Private First Class 31 Rep 113 Posts Drives: f10 lci luxury line Join Date: Jul 2014 Location: philly iTrader: (0)	I wish they would make a bypass connector that would complete the circuit for the plugs so we can remove the jb4 and install the bypass and not have to dig in to unplug the flexfuel connector which is a pain to get to the rest are easy
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05-01-2016, 03:59 AM	#9
Rob_BMW_PNW Captain 127 Rep 609 Posts Drives: 135i 2011 Join Date: Jan 2016 Location: PNW iTrader: (3)	I tried this doesnt work Need to remove everything
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