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OBD2 Blowing Fuse

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Old Aug 1, 2011 | 09:21 PM
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Default OBD2 Blowing Fuse

I have just finished a 6L swap into my 64 chevelle and when we plug the HPTuners cable into the obd2 port it is blowing the 10 amp fuse. It is on an isolated circuit so there is nothing else to cause a problem.

Please help....Do I need a bigger fuse?
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Old Aug 2, 2011 | 09:55 PM
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Anyone?
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Old Aug 2, 2011 | 10:02 PM
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Are you plugging the obd2 cable into your laptop or obd-to hptuners interface box-to laptop?
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Old Aug 3, 2011 | 01:16 AM
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Obd2 cable from HP tuners into the serial port on the laptop.
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Old Aug 4, 2011 | 09:11 PM
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Originally Posted by Fahrenschnell
I have just finished a 6L swap into my 64 chevelle and when we plug the HPTuners cable into the obd2 port it is blowing the 10 amp fuse. It is on an isolated circuit so there is nothing else to cause a problem.

Please help....Do I need a bigger fuse?
You probably do. I'm not sure about 6.0's right now, but f-body's had a 25 amp fuse, because it also powered the cigarette lighter. I would try a 15 amp and see if that works.
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Old Aug 4, 2011 | 09:53 PM
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How do you have the OBDII Port wired?
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Old Aug 4, 2011 | 11:43 PM
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Originally Posted by Fahrenschnell
Obd2 cable from HP tuners into the serial port on the laptop.
serial port on your laptop? Are you using one of the older serial style interfaces? All interfaces produced since 2006 use a USB port, not a serial port.

Also most laptops created in the last 5 or so years don't even have a serial port on them, its a monitor port on most new ones.

I would start taking a serious look at that before you go any further as this sounds like an issue.
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