Questions on OBC hack by rocker switch
 

Hi guys,

As i'm about to do the OBC hack on my MY03 with one rocker switch I have read as many available guides and posts and I must admit that got a bit confused by some details, which I'm confident you guys know in your sleep.


My goal is to do the hack with only 1 rocker switch and thereby being able to control two of the pins. I dont care about the speed gong, but would like to be able to scroll through the different functions and sometimes maybe reset the "average values".



This matrix can be found on Pelicanparts.com:

Boxster 1997-2000
Connector Pin #2 Gauge Cluster Pin #20 Select Mode Down
Connector Pin #3 Gauge Cluster Pin #21 Speed Alert/Gong
Connector Pin #4 Gauge Cluster Pin #22 Select Mode Forwards
Connector Pin #5 Gauge Cluster Pin #25 Select Mode Backwards

Boxster 2001-2004
Connector Pin #2 Gauge Cluster Pin #23 Select Mode Down
Connector Pin #3 Gauge Cluster Pin #22 Speed Alert/Gong
Connector Pin #4 Gauge Cluster Pin #21 Select Mode Forwards
Connector Pin #5 Gauge Cluster Pin #24 Select Mode Backwards



Question 1: Is "Select Mode Down" the same function that in other guides is described as "Mode Up" - and that it's only a matter of viewpoint if it is scrolling up or down? I mean, could it just be called "Mode Next"?

Question 2: If the above button scrolls through the different functions of the OBC, what does forward/backward do?

Question 3: Which one would act as "reset" for the average value functions?




TLDR version: If i can connect to only two pins, which ones out of #21, #22, #23 and 24 should i choose to be able to scroll and reset? :)



Thanks a lot in advance! :)

From the original instructions on yosief's site:

"Connect the Mode Up wire by putting a Molex connecter in Slot 22 (2001-) or Slot 21 (1997-2000). Connect the Reset wire by putting a Molex connecter in Slot 24 (2001-) or Slot 25 (1997-
2000)."

These are the two I used, and one side of the rocker scrolls through the different options, and the other side acts as the "reset" when held down. :cheers:

Molex pins
 

They are not the correct pins....can be made to fit...but requires force. I can make you a harness with the correct pins

Here's the full part's list to build a wiring harness, shouldn't cost more than $20 to build excluding the rocker switch, if you order the wire from VW. I never had any issue using the VW wire, I think the original description just characterized the connectors as "molex" ones for lack of a better description. :cheers:

1 VW Wire (#000979010)
6ft. 20-22 Gauge wire
3 Female Quick Disconnects
1 Spade Terminal
2 Butt Connectors
1 Footwell Rocker Switch (#996.613.980.00)

Thanks for you answers guys!

Please excuse me, but to bring full transparency on my stupidity: i still don't really get it.


1. Is the matrix at Pelican incorrect?
2. Is the pin #22 that Pelican calls Speed Gong actually Reset, or does it represent both those functions depending on where you are in the menu tree?


3. What does Backwards/Forwards do in comparison to Up (or Down) in navigating the menu tree?

Regards
Crib

So, i went with trial and error.

Pin 22 works as navigating through the different OBC functions.
Pin 24 works as reset

This small DIY was a real pleasure to fiddle with and with a very nice and useful result.

I would recommend everyone to do this :cheers:

Sorry I'm still new what is this for?

Obc
 

To utilize the OBC ( On Board Computer) which is in our cars even if not ordered with that option. It must be enabled in software first and then enabled with hardware. Gas consumption, outside temp etc.

Where is the website with instructions to do the hack? I was going to do this a few years ago ams just forgot about it. Now I am retired and have plenty of time


Sent from my iPhone using Tapatalk

OBC Hack Projects
 

Hello - if you're going to do this project, be sure to purchase the OBC wire harness from pdwight. It's perfect, affordable and will save you a lot of work fabricating one as the hack instructions will tell you to do. In addition, if do not have cruise control, pdwight has a harness for this too and you might as well do both at the same time. These projects are detailed in Pelicans website - 101 Project Book, projects 91 & 92. I just did both projects this past weekend. The biggest asset I had was pdwight's excellent harnesses. Good luck.

Dwight's OBC harness
 

I want to second this. Just installed the OBC using the wire harness from Dwight. Very happy with it. Looks highly professional and comes with color instructions that are very clear. Thank you Dwight!

Mark

Thanks folks
 

I truly appreciate the kind words

Dwight

I raise my glass to pdwight and recommend you all to buy a pre-fiddled wire harness from him if you want a nice looking and more straightforward installation.

I would also like to comment though that it is still a 1-2 hour DIY project if you have the tools and some minor experience in crimping cables etc. To me it's part of the fun :)

But anyway, DO IT DO IT ;)

Is there such a thing as "thirding this"?
I also got a harness from Dwight and it worked like a charm. (and looked great)
:cheers:

Is this hack available for a 2002?

Yes of course - Dwight can sell you a great harness for your 2002. I have an 02 base, and his harnesses worked beautifully - for both my OBC and Cruise Control hacks.

does he make a harness for the poor man's version??

Poor Man's
 

PM me , if you want to use a switch instead of a 4 Stalk then yes I can fix you up

Dwight

Where there buy 4 stalk and part number?
 

Does any one have the part number for the column stalk? Would love to install the stock setup, for my car. TY

Did the hack and put everything back together and not one light on in cluster or gauges. Is there a contact on the cluster that needs to touch or do I need to push each connector in tighter?

Did you cluster display the temperature before you started?
The OBC has to be enabled before the switch can access it.

No, I have not enabled the computer yet. When I say nothing, I mean the entire cluster is dark with no lights, LCD display or gauges. Imagine getting in your car before the key is in and that is what mine looks like.:eek:;);)

It sounds like the plugs for the cluster are not fully engaged. When you reconnect the plugs, make sure the sliding part of the connector is in all the way, it should kind of "snap" to let you know it is 100% connected. It's been a while since I did mine, but I think I had to test it 2-3 times, so I would recommend getting everything connected, then reconnect the battery and check it before reinstalling all of the screws that hold the cluster to the dash. :cheers:

Thanks Rick. I thought I heard that CLICK but obviously with no gauge lights, then something needs to be checked. Will try again tomorrow.

EDIT:
On second thought, I will check the fuse to make sure I did not ground one of the wires as it would seem strange that all 3 plugs are not seated all the way into the cluster.

BTW, I never disconnected the battery, is there a reason it has to be disconnected other than normal reasons?

I don't think disconnecting the battery is required, but I like to do it just to be safe when doing anything with electronics.

This morning check the fuses and all were good. Next I took the cluster back out again and the black connector was completely off I plugged in each one, one by one and everything is good now. Thank you for all the responses.

Always a safe move
 

This one is (Yoda) :)