transfercase speedo problems

ok so heres the story i bought a 92 xj off of a buddy and had to put a new transfercase in it so i removed the old transfercase which was a 242, and put in a 231 that i had bought and had a shop put in a teraflex short sye kit, now the sye kit came with a three wire plug for the speedo, i then found out that the jeep is missing the wiring harness that plugs into the transfercase and tranny and speedo.so i go to the junk yard but i can only find a harness that has a plug for the tranny and the transfercase and a speedo plug but it was only a two wire. i called the dearlerships nearby and they said that they discontinued the production of the harnesses, can anyone help me..

You are going to have to add a 3rd wire, 5v to run the sensor. I think the connector you need is the same as the later 3 wire sensors. I think I tapped into 5v at the map sensor on mine...... This is assumuming the sensor on yours is the same as on my my rubicon case.

still in need of help, jeep wont pass smog unless this wire is in cause the engine light turns on