Originally Posted by Patxi12

Seer1

My computer skills are limited, so I do not know how to put here a diagram. Also excuse my english, I live in Monterrey Mexico.

But let me tell you what a I did .

I got the Atlas adapter for my 4SP TC and it did not work, then I installed the sugested 33+33 ohms in the line, and it worked in 4low, but I had a flashing light in my intrument panel, with a DTC .

I took out the sensor (swicht ) from my original TC and I found that there are 4 different resistance values, as you push the sensor simulating 2H, 4H, N, and 4L, in 2H shows 220 ohms, and in 4L shows 62 ohms.

So I simulated this situation with a manual two throw switch, and two resistances one is 33+33 = 66 ohms, and the second I think is 210 instead of 220 ohms.

Then I took the two line that goes from the ECU to the 4sp TC sensor, and from one line I connected in paralell the two resistances, then each one to one of the two inputs of the two throw switch, and from the output of the manual swicht to the other line that goes to the ECU

So now I can select from my manual switch in my dash two positions, one with a resistance equivalent to the 2H (220ohms) and the other to 4L ( 66 ohms), and send this information to the ECU . Nothing to do with the Transfer Case. So when I am in an off road situation I can have the 4L signal to the ECU any time that I want, or 2H without a flashing light .

If you need more information please let me know

Originally Posted by KenB1010

I had the opportunity to test the TC switch values on 2 (4:1) cases this morning. Both of them tested out as follows.

2H = Open
4H = Open
N = Open
4L = 61 Ohm

It looks like the information on Atlas's web site is correct. When the atlas shows up, I'll look into installing a micro switch on the shifters to activate the 66Ohm when I shift into Low.

Originally Posted by The_Yeti

I have not done this myself and i am not trying to start a debate but i dont think that 4H would be open. the jeep in 4H has the abilit to turn off ESP when you hold the button. This dosnt happen in 2H i would assume that somehow the jeep knows 4H and 2H.

i'm just giving an idea or suggestion not saying your wrong but sometimes ideas dont hurt.

Originally Posted by The_Yeti

I have not done this myself and i am not trying to start a debate but i dont think that 4H would be open. the jeep in 4H has the abilit to turn off ESP when you hold the button. This dosnt happen in 2H i would assume that somehow the jeep knows 4H and 2H.

i'm just giving an idea or suggestion not saying your wrong but sometimes ideas dont hurt.