teknic

Yea wish I had a spare ecm laying around but already threw $1000 at this ecm which didn’t change anything, and I’m not sure if I’d need to program a used one as the info on that topic seems all over the place online. How would I test my alternators AC output? the ground wire mod, if needed I should be able to detect when testing the ECM ground. Worst case I’ll do the ground portion of it, not really trying to mess with moving my alternator wire and adding on a new circuit breaker etc. Found moparmans video for testing AC noise from alternator, I’ll test that later as well

Alright hopefully get a chance to go thru it a bit today, humidity is like 100% tho so we’ll see if I feel like working in this stuff really hope I can get this solved, I’ll feel much better about finally doing the mods I want to do if I know everything works first

Yea I plan on checking that voltage at the DLC after work. If I don’t see that voltage what would the next step be? Unplug modules on the CCD bus until it goes back to normal? Or just continue with the resistance checking from DLC to PCM and ECM pins? do you think it’s going to be a wiring issue rather than a module? Any chance it’s my cluster?

On my way to work this morning I decided to double check. When my tach dies I can still get my RPMs from my edge CTS. Not sure what that means but it seems weird that the RPM is making it to the DLC but not my cluster somehow.

So I’ve gone through the diagnostic list to find that it’s saying for both of these codes I’m basically looking for an issue on the CCD bus. So I’m checking Pin 40 and 41 from ECM to DLC for open or high resistance, pin 30 and 28 at PCM C3 connector to DLC for open or high resistance, Pin 31 at PCM C1 for resistance to ground, and pin 30 at ECM for resistance to ground. is this all I need to be looking at? Only the CCD circuit for both these modules?

Hey, ive got a 2001.5 2500, 6-speed truck. intermittently my tach/oil press/water temp gauges will stop working. Typically when this happens my engine also has a quick “kick” to it like it shuts off and jumps right back on. I never get the “nobus” message on my cluster. if I check my codes I have p1693, p1694, p1698. Also randomly a p0501 code and ABS light. I replaced my ECM for this issue 1-2 years ago but it didn’t change anything, but I used a reman one so not sure if it’s quality. The issue never went away though. was hoping someone could help guide me through what wiring to check, or really just help me determine what my issue is. I believe I’ve monitored my RPM with my zedge before and when my tach is dead the RPM still works on there as does Oil Pressure, but the Water Temp just stays in one spot until the gauge comes back to life on the dash. any help is very appreciated, oh and I have no access to a DRB3