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Old 05-03-2017, 03:33 PM   #1
Skoolie
 
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This is starting to baffle me DEFINITELY need a think tank

**** ! You guys, this is starting to stress me out! I had a mechanic come over and we did more tests cleaned all the contacts on the positive and the grounds she fired right up.
Go to start her this morning and..chug.....chug....chug....chug. ..... And big pause chug and then she fired up alas it sounded.like she almost didnt start . I had the cut off switch off all night so there couldn't have been a battery drain on the new battery .
For all yall that haven't been following its a 97 5.9 cummins all mechanical 12 valve 12 volt 6bt motor brand new battery, starter and alternator less than a year old and this all started when I tried to start her in 12 degree weather and she just started clicking , since then I've gotten a new battery and like I said cleaned and tightend all the grounds and + contacts halp me!!!
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Old 05-03-2017, 03:36 PM   #2
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Maybe try bypassing the cutoff switch, it could be the culprit, maybe.
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Old 05-03-2017, 03:56 PM   #3
Skoolie
 
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I can try that but what would I do during down time I guess unhook the battery
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Old 05-03-2017, 03:58 PM   #4
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I can try that but what would I do during down time I guess unhook the battery
IDK, I don't have a switch and my batteries stay good with infrequent use, but yeah just unhook the batteries I guess. If bypassing works, just buy a new switch.
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Old 05-03-2017, 04:03 PM   #5
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Since your batter does seem to drain overnight I'd definitely take off a battery lead until you get that figured out.

Just out of curiosity have you checked the other end of your ground wire? Vehicles that sit a lot tend to get varnish on the ground contact quite easily. Take off the ground wire and rub the contact area with a bit of sandpaper, on the bus and the battery cable.

The contacts don't tend to loose conductivity while the vehicle is in frequent use.
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Old 05-03-2017, 04:08 PM   #6
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what size is your battery? get some voltage readings from it. then check voltage readings at the starter.

could be a bad starter cable. sometimes they corrode inside the coating.
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Old 05-03-2017, 04:08 PM   #7
Skoolie
 
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Thank you for your response and yeah WE did that yesterday and only after this all started did the bus sit for two months otherwise I usually drive her a little every couple days as I live in s.f. And am always runin frim the parking nazis and street sweepers LOL
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Old 05-03-2017, 04:13 PM   #8
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could be a bad starter cable. sometimes they corrode inside the coating.
this, I would check starter and ground cables for any hard spots where the wire is difficult to bend or where the jacketing is visibly messed up. Generally when theres a hard spot in a cable it means the inside has turned into a wonderful green chunk of corrosion preventing the passage of electricity...
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Old 05-03-2017, 04:15 PM   #9
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Hmmmm we did the drop test and everything seemed fine but I have to say when this problem originally started I saw some smoke coming off the starter mind you it was 12 degrees but I want to ask how do I check if the starter cable is bad?
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Old 05-03-2017, 04:19 PM   #10
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Take a multi meter and switch it to the ohm setting. Take one lead and hook it up to one end and the other lead and hook it up to the other end. Measure the resistance of the cable, it should be a very low number. Then look online and figure out what a cable that size and length should ohm out at. If the reading you take is much higher or there is no continuity between the ends of the wire then you have a bad cable.
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