2.5S to 2.5SL interior wiring harness swap

3211 Views 158 Replies 5 Participants Last post by markismail, 1 mo ago

JoeV2

Discussion Starter · 7 mo ago

Does anyone know if I would be able to swap the wiring harness for my 2.5S with a harness from a 2.5SL or even a 3.5SL to incorporate the use of the heated seats, and steering wheel controls, and any other features?

I'm not sure exactly which wiring harness I would have to purchase but I already have my hands on the harness for the heated seats and have my eyes on the steering wheel with volume controls. I'm just not sure what harnesses i would need or if I need to swap out the fuse box for the heated / power seats also.

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JoeV2

Discussion Starter · #141 · 2 mo ago

VStar650CL said:
The seatbelt signal to the cluster will come from the Bag Brain, but if the Brain is talking then it has to have power. If it's absent on the scan then it's a good bet you just popped the Brain fuse. Not all scanners will detect an absent unit, and the non-functional belt lamp would suggest it's offline.

Is there a separate fuse for the bag brain? I swapped out the 10am fuse under the steering wheel but still no luck. The OCS system is working correctly so I’m assuming the bag brain is getting power but still the airbag light is on.
The seat belt i bought was locked up and wouldn’t come apart so I’m getting it exchanged soon and maybe that’ll fix my problem but i don’t think it’s the cause for the seat belt light not showing up. Thank you so much for your help with this because i would have been lost a long time ago without this amount of help

VStar650CL

· #142 · 2 mo ago

2

The Brain does have its own fuse, #13 in the cabin fusebox. I just looked and the seat belt lamp isn't set up like later models, it's a straight grounding switch in the driver's buckle which is connected to the cluster. The Brain doesn't know the lamp exists, it only taps the signal as an input. There's apparently no warning for the passenger belt even on cars with OCS. The Brain has an input it uses in deploying the bags properly, but there's no connection to the lamp.

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JoeV2

Discussion Starter · #143 · 2 mo ago

VStar650CL said:
The Brain does have its own fuse, #13 in the cabin fusebox. I just looked and the seat belt lamp isn't set up like later models, it's a straight grounding switch in the driver's buckle which is connected to the cluster. The Brain doesn't know the lamp exists, it only taps the signal as an input. There's apparently no warning for the passenger belt even on cars with OCS. The Brain has an input it uses in deploying the bags properly, but there's no connection to the lamp.
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Thank you so much for this! I checked the fuse for the bag brain and it’s got power so I’m assuming the bag brain might be the problem unless when i change this seat belt the issue might fix itself, Im going to check the seats and see if the seat belt is getting shorted somehow. Could the belt switch go bad and cause something like this?

VStar650CL

· #144 · 2 mo ago

JoeV2 said:
Could the belt switch go bad and cause something like this?

Sure. It's a grounding switch, if it doesn't ground then the LED in the cluster will never light.

JoeV2

Discussion Starter · #145 · 2 mo ago

VStar650CL said:
Sure. It's a grounding switch, if it doesn't ground then the LED in the cluster will never light.

Is the orange wire going into the seat belt supposed to have power?

VStar650CL

· #146 · 2 mo ago

Not power, but it should have voltage coming through the LED. It probably won't light a test lamp and should read a volt or two below battery voltage. The A <-> D connection shown on DI-WARN-02 is a power connection inside the cluster. When the buckle switch closes (unbuckled) it grounds the other side of the diode, current flows and the diode lights up. When the switch opens the current has noplace to go, so the LED turns off. I believe the Brain just watches the signal, but it's possible it can ground the LED too, in parallel with the switch. If it gives a passenger buckle indication, that would be how.

JoeV2

Discussion Starter · #147 · 2 mo ago

VStar650CL said:
Not power, but it should have voltage coming through the LED. It probably won't light a test lamp and should read a volt or two below battery voltage. The A <-> D connection shown on DI-WARN-02 is a power connection inside the cluster. When the buckle switch closes (unbuckled) it grounds the other side of the diode, current flows and the diode lights up. When the switch opens the current has noplace to go, so the LED turns off. I believe the Brain just watches the signal, but it's possible it can ground the LED too, in parallel with the switch. If it gives a passenger buckle indication, that would be how.

I don't think it even reads the passenger belt from what I remember but I did notice when I put the car into ACC / ON I don't see all the lights on the dash come on. I'm missing the e brake light, seatbelt light and battery light and when I put the car into Neutral the area where the "N" would be is blank could all my problems just be the dash?

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VStar650CL

· #148 · 2 mo ago

Yep. All of those are similar grounding circuits which get power from the the cluster's internal bus. Sounds like there's a problem with ignition power to the cluster or the cluster itself.

JoeV2

Discussion Starter · #149 · 2 mo ago

VStar650CL said:
Yep. All of those are similar grounding circuits which get power from the the cluster's internal bus. Sounds like there's a problem with ignition power to the cluster or the cluster itself.

Do you think it could be causing the airbag light to stay on also?

VStar650CL

· #150 · 2 mo ago

No. The Brain has no way to verify if a belt switch is actually working or not, so they don't code for it. The lamp has to be from something else.

JoeV2

Discussion Starter · #151 · 2 mo ago

VStar650CL said:
No. The Brain has no way to verify if a belt switch is actually working or not, so they don't code for it. The lamp has to be from something else.

Okay so looks like I'm going to be switching these airbag modules and hoping it all works out thank you sm!

VStar650CL

· #152 · 2 mo ago

JoeV2

Discussion Starter · #153 · 2 mo ago

So my alternator isn’t coming on, I check the fuses and the Y/B wire comes on with no problem because it’s right to battery, The BR/Y wire gets no power at all but when i put power to that pin on the alternator from the battery the alternator starts to charge and i get voltage. I know the dash isn’t working correctly but i thought that BR/Y wire was only to tell the dash to turn the battery light on. But it seems to be turning the alternator on

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VStar650CL

· #154 · 2 mo ago

You sure it's pinned correctly? Sounds like maybe the wires are reversed, but I hope that isn't the case. Putting the field supply (Y/B) on the L terminal (BR/Y) always blows the driver for the dash lamp and sometimes blows up the whole regulator. The diagram above is showing terminal side of the connector, not the harness side where the wires go in. The old manuals are all that way, they use single outline for terminal view and double outline for harness view, but they don't show TS/HS like the newer manuals. So looking at the top of the alternator, you need to flip the view end for end.

VStar650CL

· #155 · 2 mo ago

Just checked my '04, Y/B should be closest to the engine and BR/Y should be closest to the radiator.

JoeV2

Discussion Starter · #156 · 2 mo ago

2

VStar650CL said:
Just checked my '04, Y/B should be closest to the engine and BR/Y should be closest to the radiator.

ignore my amp power wire but I’ve got the same setup, but the BR/Y wire never gets power but i put the power there from the batter and it started charging I’m not really sure why and Y/B has power 24/7

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JoeV2

Discussion Starter · #157 · 2 mo ago

Figured it out… my damn cluster wasn’t plugged in all the way… Airbag light is gone alternator turns on only thing not showing is the seat belt light which i now assume is the switch

VStar650CL

· #158 · 2 mo ago

markismail

· #159 · 1 mo ago

Airbag light is gone alternator turns on only thing not showing is the seat belt light which i now assume is the switch

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