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When it was just the tps on my mind I didn't want to buy another one but been worried about the PCM all day so now this is no problem to me lol. I'll let you know how it works when I get another PCM

It's like it's reading open all the time

Well I'm def sure it's the TPS. the plug if the MAP sensor and TPS both are 5.0 volts exactly. The TPS is approximately 4.4 with the throttle open and closed

I had to go in to work and can't do anything to it till after 6 tonight but I will let you know. And the analogies don't bother me. They help me understand how it works so keep me coming. I do have a obd 1 and 2 scan tool. But other than that I'm as blind as the pcm. As soon as I get home I will...

So the original PCM is back in the jeep

I don't have the pcms with me but if I'm not mistaking the numbers do match. If not than that's def my fault. Still learning the electrical side of vehicles. But with the PCM I recently purchased the vehicle crank and fired up but instead of ideling it just shut off. I've tried cranking it...

I forgot to tell you. I had to put the old PCM back in cause with the one I bought didn't seen any good. When I finally got power back. The engine crank but shut off immediately. Kept doing it so I swapped pcms back and it cranked and stayed running.

Hey Greg. Now my jeep is throwing DTC 24. TPS input is higher than maximum voltage. Looked at the wires and they don't look bad. The TPS Was replaced maybe 2 months ago. What causes this? It's just coincidental that this is happening right after I've done everything I have to it. When I pull out...

Does anyone know if this is a bad tps or could it be caused by something else? Also could this be happening because I just put the PCM in? I put the other PCM back in because when I fixed it last time it would crank and fire but shut off immediately. As soon as I put the other one back in it...

I've recently had trouble with my jeep and got it running again. Now my check engine light flashed code 12 which is PCM lost power. True I have unhooked the battery and changed PCM and that wasn't the problem so I put the old one back. Also the OBD 1 is throwing code 24. My throttle position...

THANK YOU FOR EVERYTHING!!! the jeep is running now. It was the TCM. Changed it and power came back to everything. Still got some work for me cause it sounds like a vacuum leak. Maybe something I unplugged and didn't hook it back but it's dark so I will figure that out hopefully tomorrow. Your...

And of you think bypassing the TCU is the right thing to do, how do I bypass it?

This may be a stupid question but.. everytime I look up TCU i get TCM. Are they they same thing? And if I bypass the TCU The power in the relays 30 terminals come back does that necessarily mean that it's my TCU that's causing everything?

Yes, fuses 2 and 3 are the only ones and only the asd relay and the fuse pump relay as I can tell. I do appreciate everything and for not giving up as well.

Is there a way to read the code that may be faulty while the jeep isn't running? I know it will show quite a few of them but maybe I could write them all down and start marking stuff off the list. I have a obd 1 and 2 reader but I have never done it without the engine running.

I took a test light to the wires that run to the alternator field and I'm getting power through them. The relays still don't work on #30 terminals. Also now I learned that the tcu fuse (3) and the ignition control (2) both located in the pdc does not have power to them.

As shown

Does the asd relay power the alternator or does the alternator power the asd. I seen on a wire diagram that there is a wire that goes from the alternator that splices off to the asd and fuel pump relays that powers the #30 terminals.

First I want to say thank you for all the help you have giving me on my jeep. It has been a blessing. I've learned a lot. But it's still not fixed but have narrowed it down to the power distribution center. I ended up jumping the terminals for the fuel pump relay and the ASD relay and found out...

Also on the 93 jeep grand cherokee. There are 2 wires to the coil. Should both of them have power and it grounds out on the engine or should only one of them have power. Right now only one wire has power on it