3.3TT Creating True Plug-N-Play JB4 Harness (w/Fuel Wires)

[Terry@BMS]

Yes we're going to make the #1 position wire red to simplify it.

 

[Terry@BMS]

Any chance I can buy that set off of you?

We'll have them in a few weeks. Just run sans fuel wires until then if you're really concerned about a pin hole in the factory wire under the sleeve.

 

[MrSmoofy]

Just ordered by JB4 today so hurry up LOL

 

[turboAWD]

Looks great. I assume that since the posi-taps never need to be removed, it should be good for lifetime..

 

[Revvdmedia]

Found the connectors and made a couple sample adapters. Ours will look like this. Around 3" long and simply plug in to the o2 sensor harness. Then you add the JB4 posi-tap to the jumper wire. Will take a few weeks to get them made and retail price will be $59 for the pair.

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It was really bothering me having that extra $59 dollars in my bank account, good thing you're going to put these up for sale.

 

[RUFFSTUFF]

Looks great. I assume that since the posi-taps never need to be removed, it should be good for lifetime..

Or you can do a more permanent connection for piece of mind....

 

[ecko04]

I’ve gotten quite a few messages from members since @Terry@BMS posted photos yesterday who think that Terry is overcharging for his harness @ $59 for both and believe that having me make them or them making their own comes out to be cheaper.

This is simply not true. At $59 for both harnesses, granted you still need to tap pin 1 for the fuel wires, it’s an awesome price.

LSU 4.9 connectors are $16/each, and you need 4 (2 male and 2 female). You also need the appropriate crimp tool, wire, seals, and terminals. If you’re making it yourself, and assuming you don’t already have the necessary parts, it’s a little over $100.

At this point Terry is providing the superior option, given the price, and it takes all of 5 minutes to solder the fuel wires to the extension harness he’ll be selling thereby still eliminating the Posi-Taps. Assuming it has the seals, which prevent water entering the socket, I believe you should consider that solution.

Just my $0.02.

 

[MrSmoofy]

I’ve gotten quite a few messages from members since @Terry@BMS posted photos yesterday who think that Terry is overcharging for his harness @ $59 for both and believe that having me make them or them making their own comes out to be cheaper.

This is simply not true. At $59 for both harnesses, granted you still need to tap pin 1 for the fuel wires, it’s an awesome price.

LSU 4.9 connectors are $16/each, and you need 4 (2 male and 2 female). You also need the appropriate crimp tool, wire, seals, and terminals. If you’re making it yourself, and assuming you don’t already have the necessary parts, it’s a little over $100.

At this point Terry is providing the superior option, given the price, and it takes all of 5 minutes to solder the fuel wires to the extension harness he’ll be selling thereby still eliminating the Posi-Taps. Assuming it has the seals, which prevent water entering the socket, I believe you should consider that solution.

Just my $0.02.

I totally agree, unless you already have the crimp tools for this to do it the correct way there is no way you can beat Terry's price.

 

[robz32]

Found the connectors and made a couple sample adapters. Ours will look like this. Around 3" long and simply plug in to the o2 sensor harness. Then you add the JB4 posi-tap to the jumper wire. Will take a few weeks to get them made and retail price will be $59 for the pair.

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That's great news Terry. Thanks for coming through with this. Will they come with some sort of heat shield jacket?

Put me down for a set.

 

[Terry@BMS]

Not planning on a jacket right now as it doesn't appear needed, and will complicate the install. But we'll evaluate it during testing.

 

[Eric Arroyo]

We'll have them in a few weeks. Just run sans fuel wires until then if you're really concerned about a pin hole in the factory wire under the sleeve.

Haha, I plan to keep this car till at least 100k miles so anything I can due to remotely reduce physical wear is a plus. I know, ironic that I'm willing to tune, but don't want to poke a hole in the harness. But that's also why I'm logging all (most) of my car's sensors while I wait to tune; so I can get a baseline under all driving conditions to compare the tune to and make sure I always keep my car in a safe range.

I suppose the "safer" solution is to actually run the JB4 without the fuel wires first, verify that everything works well, then add the fuel wires once your harnesses are ready (as you suggested).

 

[ecko04]

Haha, I plan to keep this car till at least 100k miles so anything I can due to remotely reduce physical wear is a plus. I know, ironic that I'm willing to tune, but don't want to poke a hole in the harness. But that's also why I'm logging all (most) of my car's sensors while I wait to tune; so I can get a baseline under all driving conditions to compare the tune to and make sure I always keep my car in a safe range.

I suppose the "safer" solution is to actually run the JB4 without the fuel wires first, verify that everything works well, then add the fuel wires once your harnesses are ready (as you suggested).

Just for clarification, you aren't poking a hole in the car side harness. You'd be poking a hole in the sensor side harness, which consequently would be replaced if you say, replaced the sensor at some point during your ownership, as it is a user replaceable part. I could see hesitation of modifying vehicle side wiring but sensor side wiring should be fair game.

 

[Eric Arroyo]

Just for clarification, you aren't poking a hole in the car side harness. You'd be poking a hole in the sensor side harness, which consequently would be replaced if you say, replaced the sensor at some point during your ownership, as it is a user replaceable part. I could see hesitation of modifying vehicle side wiring but sensor side wiring should be fair game.

Oh, wow, thanks for that. I didn't realize there was a pigtail off the O2 sensor. I thought the connector was part of the sensor body (haven't actually looked at it yet). That does make me feel a whole lot better about it. Thanks!

 

[oddball]

Yeah, $59 is a good deal. I was about to make my own set, but those 4.9 plugs are horribly expensive in small orders. For reference, I completely custom wired my '72 Cutlass with Weatherpack, Packard and Molex connectors. I have several manufacturer specific crimpers and make extensive us of my soldering iron. All that said, it's hard to build a set yourself for less than $59.
And these pins use a specific type of crimp. You won't get good results from your $2 parts store "crimper".

 

[SteveCo]

We'll have them in a few weeks. Just run sans fuel wires until then if you're really concerned about a pin hole in the factory wire under the sleeve.

Looking forward to when you release this, then I'll buy the full JB4 package. I've always avoided use of 'Posi-Taps' or any of their insulation-piercing ilk, so that as a fuel wire connection method was something that has been holding me back.

Kudos to the OP for the his original work, which brought this to the forefront and precipitated a true plug n' play harness solution.

 

[turboAWD]

Kudos to the OP for the his original work, which brought this to the forefront and precipitated a true plug n' play harness solution.

Agreed - maybe those of us who end up buying Terry's part should throw $5 ecko04's way to encourage him to "keep innovating"..

 

[ecko04]

Got to work on a revised harness of my own today. Reduced length, retained PET braided heat sleeving, soldered to pin 1 (signal), taped and heat sleeved.

 

[MrSmoofy]

Got to work on a revised harness of my own today. Reduced length, retained PET braided heat sleeving, soldered to pin 1 (signal), taped and heat sleeved.

Nice! So how soon could you send me a set?

 

[turboAWD]

Looks so very nice!

 

[ecko04]

@Gtecko was kind, and trusting, enough to send me his JB4 along with fuel wires (still waiting for the OBDII wiring and JB connect). I hooked him up with a true PNP solution modeled after my shortened harness from earlier.