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illusionist · 10-27-2016, 08:42 AM

Help.
I filled the batteries and while putting the last positive terminal back on there was a small spark and I heard what I would describe as a pop or a clunk

After finishing up I tried starting my generator. Which worked just fine before I stated this batterY job.
It won't start. Nothing happens.
I checked circuit breakers. Nothing popped.
I checked the inverter converter nothing seems wrong there

Electric is not my thing. Lol

Any suggestions would be greatly appreciated.
What to check where to look etc

This is a 2000 coachman sportscoach class A
It is an onan 7.5 generator. At least I think that's the proper name.

Thx in advance for the help

twinboat · 10-27-2016, 08:57 AM

You probably left the battery cable, going to the generator, off.

The clunk was probable the house disconnect or isolator solenoid engaging, once it saw battery power.

dennis45 · 10-27-2016, 09:55 AM

Like Twinboat said, you must have left a cable off. Recheck your connections.

For future reference, you don't need to remove any battery connections to top up the water in the batteries.
If you do need to remove cables for any reason, ALWAYS remove the NEGATIVE cable first, then the Positive. When reinstalling, put the POSITIVE cable on first and the the Negative last. This will avoid causing undue shorts to ground and big sparks.

illusionist · 10-27-2016, 10:24 AM

i am confident that all is hooked up right. i did not forget to add the cable however i twas that cable the did spark.

the question now is what do i check? is there something else to check other t hen the circuit breaker or the inverter converter.

thanks for the help and info..

illusionist · 10-27-2016, 10:27 AM

oh and the reason for removing the cables was due to the battery slide for filling the batteries would not open as it was butt up against the cable. it had to be removed to turn the slide. i moved the cable over a bit so when i put it back on so that i did not need to remove in future. thanks again and hoping some one has some more suggestions.
very frustrating to fix one thing and to end up with another situation LOL

nukerj · 10-27-2016, 10:35 AM

Check your battery disconnects, if they are relay driven then they would open after losing power. If they are mechanical they should still be on.

twinboat · 10-27-2016, 10:50 AM

Your saying the large cable that goes to the generaror sparked ?

That cable should go to a HI-Amp, resetable breaker nearby, then to the generator.

The generator uses the chassis ground near the batteries and near the generator as the negative wire.

That's where you need to check. The converter and inverter use negative cables to the battery.

**Lt Dan** · 10-27-2016, 03:08 PM

If you don't have the high amp resetabble circuit breatker, then you might have blown a high amperage buss fuse. Look for something like below. Check the voltage across the fuse. If there is zero voltage the fuse is good, but if you get a voltage reading then the fuse is blown.

WillsDP · 10-27-2016, 03:43 PM

Quote:

Originally Posted by Lt Dan

If you don't have the high amp resetabble circuit breatker, then you might have blown a high amperage buss fuse. Look for something like below. Check the voltage across the fuse. If there is zero voltage the fuse is good, but if you get a voltage reading then the fuse is blown.

Great advice on how to check the fuse ...w voltage .