Postive / Negative ground system
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09-17-2005, 07:38
Post: #1
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Postive / Negative ground system
I have two Bluebird QBRE's and they are wired a little diffently.
In short, how can I tell if someone has wired one bus or the other for a positive or negative ground system? Please only advise if you can supply me with some tests I can run with a meter or if you've had experience with electrical systems. I'm running inverters and they've warned NOT to use these with a positive ground system. The reason I ask is because there is a + and - terminal on the battery hooked likewise to the alternator. Then I have a 3rd wire, probably 6 gauge that runs to the starter. NOW, on the 1st bus this 3rd wire runs from the + on the alternator to the starter SOLENOID, where is shares a main + feed from the battery. On the 2nd bus, this same wire runs from the - side of the alternator to a ground stud of the back of the starter BODY, where is shares this stud with a main ground strap. Is this a postive ground system? I only discovered this after on the 2nd bus I hooked this wire to the + side of the alternator to match the other bus, only to have it heat up. I didn't know why until I traced the wire to the ground stud on the starter body. Would anyone know of any reason why a mechanic would do this, especially on two identical buses? And more importantly, how can I wire this system up to guarantee that it's the typical negative ground system that I need? Or is this system still a negative ground anyways?? I have a little electrical knowledge but I'm stumped and I really don't want to damage my new inverters. Thanks, Steve Two '98 Bluebird QBRE Partybuses |
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Messages In This Thread |
Postive / Negative ground system - transit360 - 09-17-2005 07:38
Postive / Negative ground system - Scott Peatross - 09-17-2005, 13:42
Postive / Negative ground system - steve wicker - 09-17-2005, 20:01
Postive / Negative ground system - bluebirdsp36 - 09-18-2005, 07:57
Postive / Negative ground system - Tom Warner - 09-18-2005, 12:03
Postive / Negative ground system - steve wicker - 09-19-2005, 04:03
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