engine103 Posted August 8, 2022 Share Posted August 8, 2022 Engine Electrical Problem Traveling through South Dakota last week, I began having problems with keeping my generator running while traveling. Soon after this I lost cruise control then noticed that my voltmeter had dropped to zero. Within a few minutes the transmission dropped down to 4th and what I believe went into limp mode which resulted in a top speed of 55MPH. Hoping to press on to Sioux City another 30 /40 mile where we could get some help and avoid a tow. As we pulled off the interstate it was obvious that we were about to lose all engine power but were able to make it to the truck parking area where it just died. Across the street was a large truck repair (First State Truck Repair) but we are dead with no starting power. Of course, this was a Sunday, and they were not open. Monday, I called a tow company, but he was relucent to come out for a ¼ mile tow and suggested if I had a jump start box it should get me started and if left connected would get me across the street to the shop, and it did. “I” told the shop that it was an alternator problem and so they replaced the stock alternator (Cummins ISM 500), with a new alternator but had a problem getting a charge to the batteries and said there may be a problem with the battery isolator, they could replace it or wire around to make it work which I had them do so I could get back on the road. Now I would like to undo what they did with a new isolator and my rebuilt original alternator. But I need a picture of how the high voltage was connected at the isolator. Ivan, would you mind posting a picture of the High voltage box to use as a guide? Thanks, Jim Link to comment Share on other sites More sharing options...
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