I know I've seen this discussion before. I have a 90 that had a 3.9 and I replaced the engine and transmission from a donor 92 that had a 5.2 with auto. Now I'm going to a H.P. 5.9 that is on my engine stand until the end of this month along with a Mopar performance ECM for a 94 1500/Auto.

Now I know that I will experience a check eng. lamp code for a transmission temp. sensor and I know there is a way to fool the ECM with a transistor. I have installed a dedicated transmission cooler and fan that has a trans. temp sensor and have a separate sensor for my transmission gauge. I don't know if either of those will do to take the place of a transmission temperature sensor. I also don't know which pin on my ECM looks for that sensor input.

I know Crazy 4x4RT posted a wiring diagram and info for this quite a while back but I can't find it. Can this be reposted?

 

All you need is a 1/2W 1k Ω resister. You can buy a pack of 5 for $1.00 at Radio Shack. Here is my post on it. https://dodgeforum.com/forum/1st-gen...omputer-2.html

You might be able to wire in your temp gauge sensor, it depends on its resistance value at temp. The chart in my post has the ratings, if your sensor falls withing range your good to go.

Don't forget to post up some pictures so we all can see what is going on.

 

Thanks Crazy I guess that is showing pin 42 as the signal on the ECM and I'm not sure how to read the line in the diagram that says black and points to pin 21? then it appears it points to pin 11? Which pin is used for ground?

 

Yes 42. I had it listed in the text if you needed so you don't have to read the diagram.

The Black text in the pin-out picutre is refering to the color of the connector. The ground wire is pin 11+12 Black/tan wire.

I just grounded it to the inner fender.

 

10/4, pin 42 and to ground. Thank you mate.

 

Yes but you have to have a 1k resister on that line from ground to pin 42.