Blakehenryy

Anybody have any ideas on what to do? I’m pretty stumped.

Well I got the computer back, put it in and well..... same thing

Just got an email from automotive computer specialist and it has been confirmed that is my ECM

I appreciate all the help! I will definitely give them a shout today. I’ll also keep the forum updated on what I find out Incase anyone else runs across this

I appreciate you simplifying that for me. I did those 3 things and got those results. Buddy I bought it from says he got it tested, but maybe he was told wrong. Where should I send it to get tested?

Okay, that’s exactly what I did and put the ground on the fuel filter housing bolts and tried body and same results OL. So wire is good but does that mean ECM is bad sensor the wire is good? Or do I keep going with the test?

Okay now I’m starting to understand. So it’s the signal wire that it is grounding out causing it to say it’s a broke wire. Correct?

Okay, with that being said am I suppose to have some type connection with the signal wire and a ground? Cause I have continuity with pin #30 and #49 which are grounds. Or should have 0 continuity with those 2 ground wires with the signal and only have continuity with #17, which is the crankshaft sensor signal? I’m just really confused cause I’m no wiring genius, all I know how to wire is simple things like a light bar haha. I’m sorry if you have to dumb it down for me I just don’t get it with wiring haha @Mopar1973Man the part that’s just confusing is the instructions tell me that if I get more than 5 ohms it’s ECM. If it’s less than 5 ohms it’s the wiring and I’m just not getting ethier

Well I appreciate the input buddy! I’m thinking that my signal wire on the sensor side is grounding out. Just because the other two pins on the ECM #30 and #49 are grounds and maybe they are just rubbing to gather or something. I’m just hoping that @Mopar1973Man can tell me why it’s giving me the OL when I test the terminal Cand ground resistance or what the OL means.

I thought I was checking for resistance? So I have it set, on my ohmsmeter, to 400 ohms and all I get is OL when I do one end on ground and other end on terminal C I’m hoping it’s something that simple. This truck was my buddy’s who sold it to me for a steal. When he got the truck it had the p0336 issue, but he couldn’t figure it out. So I bought from him for $4,000

Just a quick update: just out of curiosity I decided to test all the pins in the ECM to see if it had continuity with the signal wire and turns out pin#17,30,49 all have a tone. Pin #17 is the crankshaft position sensor signal wire but #30 and #49 are grounds and when I giggle the harness the tone goes in and out. So I’m starting to thing that signal wire is being grounded inside the harness

Sorry for the long time with no update. I was running some test on it and in the process I fried the oem crank sensor, Anyways. I tested the continuity on all 3 wires from the sensor to the ECM and all 3 passed. Turns out I was wrong on what pin was what. Signal is pin #16, ground is #4 and constant 5v is #3. I tapped into the sensor side signal wire while running and I get a bunch of voltage jumping, so I guess that passes. So what’s next to test? Also, I put the old oreillys one back and the Rpms started to working for 5 seconds then tach die again. but I noticed with the 5 seconds of it running it sounds like it runs bad, but once the tach dies it’ smooths out. This question is actually for you. I posted the same topic in cummins forum and a guy direct me to your website, where you did a break down on how to test the p0336. And now I’m stuck. I’m on #8 where it says “ Ensure CKP sensor connector and ECM connector are still disconnected. Using ohmmeter, checkresistance between ground and terminal "C" (Gray wire) on CKP sensor connector. If resistance is 5 ohms or more, replace ECM. Perform TEST VER-5A . If resistance is less than 5 ohms, repair short to ground on Gray wire between CKP sensor and ECM. Perform TEST VER-5A .” I did this and I got OL on the ohmmeter. So I put the meter on continuity, the ) ) ) symbol, and I touched one end to the C terminal and the other on ECM pin#17 and got a tone with 0.07.soooo that’s where I’m stuck do I listen to the OL, and what does that mean? Or since I got 5 ohms or more @ 7 ohms I need an ECM? just for a quick link to what I’m talking about Original motor

Just picked up the truck from a buddy, it’s a 1999 Dodge Ram 2500 24v Cummins. Sold it to me for a good deal with one problem code p0336 no tach, causing a lack of power. He told me he replaced the sensor with many different brands, and got them ecm tested and the tach worked on bench. The oreillys brand sensor works the best, works for 3 seconds and tach dies. He called a mopar friend of his and he told him to get a cummins brand crank and cam sensor. I got a cummins crankshaft sensor and tach didn’t move. Recorded live data from my code scanner and my OBD2 is able to read my RPMs, but nothing on the dash. I’m stumped F56A5B3A-DC90-4989-9821-EF45AA449DC0.MP4