High Voltage Surge - Printable Version +- Rawze.com: Rawze's ISX Technical Discussion and more (http://rawze.com/forums) +-- Forum: Big Truck Technical Discussion... (/forumdisplay.php?fid=1) +--- Forum: Ask Your question... (/forumdisplay.php?fid=45) +--- Thread: High Voltage Surge (/showthread.php?tid=909) |
RE: High Voltage Surge - CFR__AND_SONS - 09-21-2016 (09-21-2016 )Waterloo Wrote: Get under the truck and check your cabling and wiring, especially where any exits the sleeper and along the frame rails. Secure anything you find lose or rubbing after inspecting. Also open the battery box and check to insure the connections are tight on the posts, and that all are connected as they are supposed to be, take your time and really look, I have missed connecting this one wire I have at times when working on the truck. Check your grounds, especially at the engine block, you should have one at your starter, you will need a flashlight. If you see any exposed cable, I would replace it, odds are it is green and not doing its job. Awesome info! Thank you very much. I'll start checking. RE: High Voltage Surge - Waterloo - 09-21-2016 My voltage with the old and failed Delco alternator was 14+, the Leece-Neville is running around 13.8/9 volts... I think I made a wise decision going back to the OEM alternator. Oh, East Penn AGM batteries on mine... And another AGM battery on an isolator in my sleeper closet to help with the 3400 watt sound system... ;-) RE: High Voltage Surge - Rawze - 09-21-2016 I had a truck that spiked to 15+ every time it rained. We complained about it every time we went to the main terminal of the company we worked for, but they kept ignoring it. The alternator was the cause, we knew this, but no one believed us. We went through a monsoon rainstorm one time and it went all the way up to 17.9 volts and burned out all the lights, the dash, and half the ECM. Good thing it was a company truck. RE: High Voltage Surge - CFR__AND_SONS - 09-22-2016 (09-21-2016 )Rawze Wrote: I had a truck that spiked to 15+ every time it rained. We complained about it every time we went to the main terminal of the company we worked for, but they kept ignoring it. The electric guy was very busy after the rain yesterday. Turns out that everything is charging as it should. Only thing that we found was a bridge at one of the batteries was not connected properly. So we are assuming that moisture got into the alternator which caused the spike. I'm gonna keep an eye on it and plan on buying a new OEM alternator, although this delco looks fairly new. RE: High Voltage Surge - overshot - 09-23-2016 I has some peterbilts do the same thing when it rained or running in slushy snow. It was the alternator on all 3. Being out in the oil field or frequently in dusty or dirty atmosphere (hell I didn't even know I could spell that) tend to sandpaper the inside component insulation. Add water and boom you have a problem. RE: High Voltage Surge - Dcolumbia - 09-23-2016 14.5 is too high. if you are regularly running 14.8 then eventually you will burn up the batteries due to over charging. Your voltage gauge could be showing 14.5 but actually be charging less. always check this at the batteries. Mine would spike mostly while it was raining and they are all right, it was the voltage regulator in the alternator. Changed it out and now it runs between 13.5 and 14 always, no spikes. This did not start happening until I had the engine washed for the first time. Probably coincidental I am sure and continued doing it during rain storms for about 8 months until it finally annoyed me enough to change the alternator. RE: High Voltage Surge - Rawze - 09-24-2016 (09-23-2016 )Dcolumbia Wrote: 14.5 is too high. if you are regularly running 14.8 then eventually you will burn up the batteries due to over charging. Your voltage gauge could be showing 14.5 but actually be charging less. always check this at the batteries. Mine would spike mostly while it was raining and they are all right, it was the voltage regulator in the alternator. Changed it out and now it runs between 13.5 and 14 always, no spikes. This did not start happening until I had the engine washed for the first time. Probably coincidental I am sure and continued doing it during rain storms for about 8 months until it finally annoyed me enough to change the alternator. The voltage is important depending on what type of batteries you have. Cheap-o lead acid batteries -- 134.8 Volts is optimum, and they can take 14.2 max. Glass-matts -- 13.2 Volts is optimum, and 13.8 is max. 14+ will shorten their lifespan. Gell-Cells -- 13.2 Volts is optuimum, and 13.6 ids MAX. Anything above this, and you cook them and they typically go bad in less than a year. They also REQUIRE the Alternator "sense" wire to be hooked up, and not be jumpered out for correct charging. Those numbers are from just my own experience,.. NOT from the battery data-sheets. This is what I have seen with others trucks out there. RE: High Voltage Surge - CFR__AND_SONS - 09-26-2016 I went to the dealership to buy some parts and asked about the alternator. They looked it up with the vin and the guy said it's a high temperature application and it costs over $800.that's a pretty penny right there! Are they pulling my leg? RE: High Voltage Surge - Waterloo - 09-26-2016 High temp? Where is it mounted, between the turbo and the manifold under the exhaust? That sounds like BS. I just paid $530 for a brand new Leece-Neville, 160 amp. The Delco was about the same, even next door at FleetPride... A reman Delco was around $370. Anymore than those prices and they are screwing you. Unless it is a high AMP unit, which then I would say is a good price. The high amp alternator for my truck runs $1700 for a new one. Glad mine takes the 160 amp. |