What should battery voltage be while cranking?
You can test for proper cranking voltage with a voltmeter while—you guessed it—cranking the engine. The several hundred amperes of current the starter motor draws should pull the battery voltage down to a normal 9 to 10 volts. Crank for 15 seconds (no longer); the battery voltage should remain 9.6 volts or above.
What’s the voltage drop on a Cummins starter?
I drove over to Rocky Mountain Cummins and they took the RV in and spent two hrs doing a diagnostic and just like two years ago in Sioux city Iowa at a Cummins dealer they could find nothing wrong. The measured voltage drop on the starter cables were as follows 0.77 VDC on the positive cable and 0.94 on the negative cable.
What does it mean when your Cummins won’t start?
That kind of voltage drop would indicate: Weak battery OR bad cable connection OR bad starter. Start by having the batteries load tested, remove, clean and properly tighten all large connections between battery and starter. If the problem continues, suspect the starter. Thanks Brett, I’m thinking its the starter.
Why does my Monaco Windsor Cummins not start?
2003 Monaco Windsor,Cummins 8.8 L . That kind of voltage drop would indicate: Weak battery OR bad cable connection OR bad starter. Start by having the batteries load tested, remove, clean and properly tighten all large connections between battery and starter. If the problem continues, suspect the starter. Thanks Brett, I’m thinking its the starter.
What was the problem with my Cummins RV?
I had the same problem 2yrs ago in Sioux City Iowa, the RV was towed to a cummins dealer and after they backed it into the shop the service tech started it and asked me what the problem was. They checked everything and I mean everything and could find nothing wrong.
That kind of voltage drop would indicate: Weak battery OR bad cable connection OR bad starter. Start by having the batteries load tested, remove, clean and properly tighten all large connections between battery and starter. If the problem continues, suspect the starter. Thanks Brett, I’m thinking its the starter.
I drove over to Rocky Mountain Cummins and they took the RV in and spent two hrs doing a diagnostic and just like two years ago in Sioux city Iowa at a Cummins dealer they could find nothing wrong. The measured voltage drop on the starter cables were as follows 0.77 VDC on the positive cable and 0.94 on the negative cable.
2003 Monaco Windsor,Cummins 8.8 L . That kind of voltage drop would indicate: Weak battery OR bad cable connection OR bad starter. Start by having the batteries load tested, remove, clean and properly tighten all large connections between battery and starter. If the problem continues, suspect the starter. Thanks Brett, I’m thinking its the starter.
I had the same problem 2yrs ago in Sioux City Iowa, the RV was towed to a cummins dealer and after they backed it into the shop the service tech started it and asked me what the problem was. They checked everything and I mean everything and could find nothing wrong.
