Tachometer Signal
 

Gents,

Where is the best place to connect to the tachometer signal. I ask as I a have the cluster apart and have access to the plugs at the back.

From the wiring diagrams (1998) I have and posts it appear that it is plug II (white), gr/vi (I think this is green/violet; I hope I can actually discern the colours). I could solder a pin and insert into to the connector. This will be a bit messy.

Which OBDII wire is the tachometer signal? Would it be better wiring practice to use a wire tap (if so which type) and just grab switched 12v there as well? The wires I am trying to connect up are a very fine gauge.

A present it would be easier to order wire taps online rather that grabbing soldering equipment.

j

Crickets.........no one?

Check the ODB2 plug pin 9 Purple Green

tach connections
 

I have a question about doing just the opposite.

My engine swap is using a stand alone ECU that has a 5V tach driver output. As I'm not using the factory ECU to make the engine run, can I back feed the 5 volt signal into the same OBD wire to make the tach in the dash work?

I'm aware of the Tach Adapt product but I still need to find out what wire or wires feed the tach itself. 01 Boxster S 6 speed. I have the Bentley manual and wiring diagram but my eyesight is just not that good anymore.....

Thanks for any thoughts!

Thanks man. This matches with the cluster wire colour which is good news. There was nothing I could find wiring diagram-wise. By any chance can are you aware of which OB2 pin/wire colour is switched 12V???

I am leaving the factory ECU in tack so I can run all these little things like coolant temp yada yada. Might not be the "cleanest" solution but I think it should work.

If leaving the ECU in place doesn't work; I'm gonna follow this thread for a solution.

https://www.specr53.com/blog/diy/996-shift-light-install-diy/

thats what I used for my shift light and it worked great. should help you.

I used the wire in the center console under the radio Its a 4 pin plug that also has a ground. Green/Black switched 12, Red/Green 12vdc always, Brown GND.

ODB2 pin 16 Red/Black

I used this for my Traqmate system, until I started to have compatibility problems with GoPro. I switched to AIM with ODB2 bluetooth which was easier mating video to data and direct connect sensor.

If you do end up using a tap, search for posi-tap connectors, they are way better than the blade style ones that pinch onto the wire. When I wired my trailer hitch, the blade connectors that came with my harness were junk and worked intermittently, so I replaced them all (except passenger side turn signal) with the posi-tap connectors. Guess which one doesn't work reliably these days :)

Disclaimer: Maybe the blade taps that came with my harness were junk and other brands are better, but I really like the posi-tap connectors.

Thanks Steve! I was doing some surfing (not the kind I want to be doing on Coco Beach) and came to this conclusion. Thanks for confirming my arm chair thoughts with practical experience. Here is a link for everyone's benefit:

https://www.posi-products.com/

These things still use a spike going in the stands but my feeling is that they would yield way less damage while having less potential for an intermittent condition

Thanks Quad, yes this is exactly where I am going with this....If I can secure all the materials required for the install during these times, fI will post up the results.

Currently looking for a remote 3D printer for small stuff and then have them mail back the hardware.

Beautiful yes, I think you are referring to the black connector pictured here in mid-frame. I would dearly love to find a connector that goes in and slice into those leads for all the add ons I am putting in. Any mistakes would not harm the stock harness.

Did you find pins that fit in there?

http://986forum.com/forums/uploads02...1586292595.jpg