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Home » Public Forums » GMCnet » [GMCnet] I give up. (Onan)
Re: [GMCnet] I give up. (Onan) [message #190449 is a reply to message #190436] Fri, 16 November 2012 03:14 Go to previous messageGo to previous message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma:
Senior Member
Robin Hood wrote on Thu, 15 November 2012 21:16

On Thu, Nov 15, 2012 at 7:19 PM, Robin Hood <loxley@gmail.com> wrote:
> Is there a failure mode that includes backfires and the 5 amp fuse blowing?
>


http://youtu.be/Oz_ZPHdO3FE

Summary:

1. Ok, no more drinking.
2. I started the generator, removed the jumpers, and just as I was
about to put the meter on pins 8 and 11, the generator started to die,
and then died with a spectacular backfire. You can see the glow of the
fireball coming out the exhaust pipe.
3. Soon after this, likely due to either the backfire or due to me
poking around with my meter trying to make sure I got onto pins 8 and
11, I noticed the 5 amp fuse was blown.
4. I found 1 wire on the VR that had continuity with wire number 8,
another wire on the VR with continuity going to the now-empty fuse
holder ("B-pos), and one wire on the VR that I don't know where
terminates. There is not continuity between any wire and the wire
currently connected to pin 8 on the board.
5. Jumpering the board no longer even causes the fuel pump to run.

I believe the same thing would have happened had I just been drinking
a coke, but, yeah, lesson learned.

Robin Hood



Put another fuse in it and try again.

OK you have identified the wire that goes to the B+ terminal. The remaining two wires get hooked together and attached L2. That is the pair that you want remove and keep taped together when you want to remove the VR from the circuit.

Do not worry about the blown fuse. I have blown hundreds of them trouble shooting things over the years. That is why the fuses are there and why they are easily replaceable. We probably have 300 - 500 replacement glass fuses around here for that very reason. Laurie and I have also had over 50 years to collect them. I've probably got another 200 of the Blade fuse types.

Do not go over size on the replacement. Use only 5 amp fuse.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
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