'92 Dodge Cummins with no charge from the alternator - Page 2

92W250 · #16 11-03-2009, 07:39 PM

No real updates, haven't had time to work on it, trying to get moved currently, but did drive it from Orlando to Jacksonville FL, about a 2 hour trip without any problems, only had to use the headlights at the very end of the trip and had enough battery for that chore. But as soon as I figure out anything or have them try and test the voltage regulator, I will update the thread. Thanks again for the help. As for the temp switch/sensor deal, I'm wondering why they use so many sensors that are known to go bad for something like OD. I guess they want to really know what's going on everywhere to get the thing shifting right. As before though, the toggle switch is still working wonders on the OD problem

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Diesel Nut · #17 11-03-2009, 09:09 PM

Originally Posted by 92W250

The OD wasn't working when I got the truck, replaced the speed sensor and took the TPS loose to test, it still wouldn't shift. So I wired a toggle switch to the ground side of the solenoid. When I want OD, I flip the switch, allows me to shift it when I want based on load, how hard I'm accelerating, or if I'm cruising and want to grab it early. I will be down where I can put my hands on the truck on Sunday, is it ok to call then? I really appreciate all the help. As for the external regulator being bad, I can have them try and test this one as well. Drives ya crazy that you go through all these parts and replace really expensive ones to find out they weren't the problem at all. Oh well, guess I have some spares now.

A beer bets your PCM is not getting voltage from the battery to turn it on, therfore, the PCM can not tell the voltage regulator to take over control of the field. Give me a call and I can go over the PCM pin out and we'll see if your getting voltage where you need.

After I got voltage to my PCM, we found that the PCM was toast, giving 5v to the TPS and provind 5v on the sensor pin, thus the transmission would never go into OD on its own. I did the switch thing for a bit and fixed it with a 5 speed. . . . . -

92W250 · #18 11-04-2009, 06:36 PM

Not too particularly worried about the OD right now, but if the no voltage to the PCM is causing all these problems, that will be what I need to fix. Still haven't had a chance to go through and try some of the suggestions offered yet, but I'll be glad to give you that beer if that fixes the trouble, I should have some time Friday to work on it, off of work that day, so I'll give you a ring for sure. Thanks again for all the help guys. -

wildbill · #19 11-07-2009, 07:38 PM

Updates please. -

wildbill · #20 11-11-2009, 01:04 PM

Please update. -

wildbill · #21 11-14-2009, 03:18 AM

Going to close down the thread for now. Thread starter can reopen. -

92W250 · #22 11-16-2009, 08:04 AM

Sorry I couldn't get on to update things, been in the process of moving and then didn't have internet access until yesterday. Still no progress on the situation though. I'm going to try calling Diesel Nut Motorsports and see what we can figure out about the PCM, it seems to be having some issues, now the speedo is going haywire too and it's a nearly new sensor, replaced it about 500 miles ago. So at this point, not much progress and the frustration with electrical demons continues. My neighbor is a mechanic and is going to help me out some too, but I'm in need of some good Dodge diesel electrical troubleshooting help for sure. Thanks again guys. -

wildbill · #23 11-17-2009, 10:25 PM

No problem. -

wildbill · #24 Today, 03:24 PM

Please update.

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