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Everyone,
I spent a few hours searching here & read a few threads. I also have the WO troubleshooting guide .PDF & did find what covers part of the issue but still wanted to share as there's something odd.
Been looking at a M1097R1 that has a 4spd (4l80E?) in it. When you put power to it, the truck starts as it should. It was sitting for 8 months when I went to look at it & started in 3 cranks. Very clean & complete overall. The issue is the TRANS light is on when the power is moved to RUN & it stays there until the truck is off.
Tried to get it into diagnostic mode by jumping the pins (A & E if my memory serves me right, but I had the .PDF open in front of me at the time) & got nothing. I had forgotten to disconnect the glow plug controller/SmartStart box, & thinking that was it, turned everything off & disconnected it. With the SmartStart box disconnected, the truck is dead. No power, no crank, no lights, nothing. This is what has me stumped. I don't know much about the HMMWV yet, but if I'm not mistaken, the glow plugs just won't work with that disconnected, right? So I couldn't even attempt to get it in diagnostic mode with the box disconnected.
There is a section covering a TRANS light stuck on. I did on my own, look for the lead to the battery to be hooked up wrong, open breaker, etc. All seemed fine. There is a work through of testing pins on the TCM itself for voltages & whatnot that I did not do, but I will on my next check. The TCM box had been opened and someone was in there troubleshooting a bit at some point. All was very clean & in place. No obvious wire breaks or anything to be seen.
Is the dead truck with the SmartStart box disconnected a symptom of something like a bad ground, or something else? Again, my knowledge is limited but I do know the M1097R1 with the 4spd is uncommon so maybe there is something niche about this small batch of trucks or is it a retrofit? It is not previously owned by any civilians, it's from DLA this way.
If I can figure this out, I'm going to get the truck. It will be my COMMO truck that's going to get all my military radio equipment. I don't want it all to go in a 3sp truck. This one had COMMO in it previously so it's ready to go. Because this is my goal with it, I really don't want a truck project, just want to do basic fluids & checks, then start with mounting my antennas & comm systems.
As always, thank you in advance.
I spent a few hours searching here & read a few threads. I also have the WO troubleshooting guide .PDF & did find what covers part of the issue but still wanted to share as there's something odd.
Been looking at a M1097R1 that has a 4spd (4l80E?) in it. When you put power to it, the truck starts as it should. It was sitting for 8 months when I went to look at it & started in 3 cranks. Very clean & complete overall. The issue is the TRANS light is on when the power is moved to RUN & it stays there until the truck is off.
Tried to get it into diagnostic mode by jumping the pins (A & E if my memory serves me right, but I had the .PDF open in front of me at the time) & got nothing. I had forgotten to disconnect the glow plug controller/SmartStart box, & thinking that was it, turned everything off & disconnected it. With the SmartStart box disconnected, the truck is dead. No power, no crank, no lights, nothing. This is what has me stumped. I don't know much about the HMMWV yet, but if I'm not mistaken, the glow plugs just won't work with that disconnected, right? So I couldn't even attempt to get it in diagnostic mode with the box disconnected.
There is a section covering a TRANS light stuck on. I did on my own, look for the lead to the battery to be hooked up wrong, open breaker, etc. All seemed fine. There is a work through of testing pins on the TCM itself for voltages & whatnot that I did not do, but I will on my next check. The TCM box had been opened and someone was in there troubleshooting a bit at some point. All was very clean & in place. No obvious wire breaks or anything to be seen.
Is the dead truck with the SmartStart box disconnected a symptom of something like a bad ground, or something else? Again, my knowledge is limited but I do know the M1097R1 with the 4spd is uncommon so maybe there is something niche about this small batch of trucks or is it a retrofit? It is not previously owned by any civilians, it's from DLA this way.
If I can figure this out, I'm going to get the truck. It will be my COMMO truck that's going to get all my military radio equipment. I don't want it all to go in a 3sp truck. This one had COMMO in it previously so it's ready to go. Because this is my goal with it, I really don't want a truck project, just want to do basic fluids & checks, then start with mounting my antennas & comm systems.
As always, thank you in advance.
