1997 Chrysler Concorde Low Speed Fans will not come on at 2

The ECT was replaced because the original was defective ohmn checked it was way of of range, Low Speed fan is not receiving a ground signal from the ECM. The Power from Fuse "D" is going to the relay and the power from fuse "20" (inside fuse panel) is going to the ignition side of the relay. If I supply a ground the low speed fan relay the fan will come on and stay on until I shut off the engine and set a low fan relay code.

I presume what you are calling the power control module is the Engine Control Module? The ECM is located on the right inner frame rail and the grounds for the ECM are located in this area, all grounds from the ECM have a voltage drop of 0.015v during operation. The white wire coming out of the ECM is suppose to engerize a ground to the low speed relay when the ECT reads 219 degrees and dengerize when the sensor reads 199 degrees (according to information from AllData). Problem I am having is the low speed fans DO NOT come on at 219 degrees. I have to wait until the coolant reaches 230 degrees and the high speed fans will come on and shut off at 219 degrees.

I know you might be busy, but please help.
Thanks

Is the CTS an OEM part-check its resistances Hot/Cold readings

The PCM powers the coil side of the relay on the white for the low side relay-the black wire is for both fan motor terminated at left front frame rail

What do you mean by CTS? I presume this is the Engine Coolant Temperature SAensor (ECT). The original was ohmn checked and was out of range both cold and with 219 degree coolant. (AllData specs).
I believe you have it backwards, the power to one side of the low speed coil is supplied by the fuse inside the junction block under the hood. The ECM supplies a ground to the other side of the coil, therefore closing the circuit for the low speed fans to operate. The low speed fans should come on at 219 degrees and go off at 199 degrees. The ground wires for both of the cooling fans do terminate at the left front rail. A voltage drop of 0.015v is recorded when the High Speed fan engages at 230 degrees (measured from the high speed relay to the fan ground) Voltage drop measured at the low speed circuits shows battery voltage at all times. It is my opinion the ECM is not suppling a ground when the ECT reaches 219 degrees.

No problem, I wear bifocals and it is hard to follow wiring at times.
I know it is hard to believe that 3 remaned ECMs still give me the same problem. I am argueing with the manufacture about this also. What I am tring to seek is if anyone has experienced this problem and what was the solution to the problem.

NOW let me throw in a curve ball.

I also have a 1997 Chrysler LHS with a similiar problem. The low speed cooling fan come on at 230 and will not shut off. The high speed fans never come on unless the A/C is on and the High PSI side will activate them for about 20 seconds and then the high speed fans will shut off.

NOW THE CURVE BALL:
I can switch the ECMs from the LHS to the Concorde and vise-versa. The problem GOES WITH THE ECM.
I cannot get the manufacture to understand this problem.

Yea, I tried putting another jumper wire to the ECM body and nothing changes. I have 1 one ECM coming in Monday and I hope this one is calibrated right. I just cannot see Chrysler letting an coolant go to 230 degrees before activating a cooling fan, I mean 219 is over the boiling point.

The Low Speed Cooling Fans are suppose to come on at 219 degrees and go off at 199 degrees, the High Speed Fans are suppose to come on at 230 degrees and go off at 219 degrees (according to AllData)

This system calls for a 16 psi cap and yes I use a 50/50 mixture, but I might just crank it up to a 70/30 mixture just for good measures.

My problem still is getting the Low Speed Fans to come on at 219 degrees and go off at 199 degrees.
With the Hot weather here in Florida, I dare not chance sending this car out knowing that just the High Speed Fans are coming on at 230 and going off at 219, this engine will be cooking in the hotter weather.