| Electrical mystery [message #215454] |
Tue, 23 July 2013 12:53  |
lance
Messages: 190
Registered: December 2004
Location: Vancouver, WA
Karma: 0
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I've only had my 74 Palm Beach about two months but this is my third GMC. I immediately replaced a working buzz box because it really buzzed, but it was working. I installed a new Intellicharge 9245 and all was well.
Then the night before last the furnace would not light. It would try for about one minute and then shut down. The next morning I noticed that my lights seemed a bit dim and put two and two together. I presumed the furnace would not light is because the voltage was below 10.5 volts. I got a volt meter and went to my new charger to measure the output. It was about eight volts. So I assumed that the Charger had failed but when I removed the load the output of the charger measured 13 volts. I hooked it back up but had to go to work. Now the furnace still won't light and the voltage reads about 10 volts. What is going on? No other changes in my electrical system except I added a rear view camera last weekend.
What say you electrical detectives? Anyone have a suggestion other than paying my local mobile RV repair guy $100 an hour to make me look stupid. You guys can make me look stupid for free. What, I didn't say that.
Who's got the answer?
1974 Palm Beach
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| Re: [GMCnet] Electrical mystery [message #215463 is a reply to message #215454] |
Tue, 23 July 2013 14:05  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Well, I'm a Luddite - I just tightened the bolts up in the transformer in the original power supply and I soldier on with it. I have a gee - whiz solar setup charging the house battery the PO put on, so I don't worry about drying it out. And I have a Progressive Dynamics switching supply for when the original brute - force one dies.
--johnny
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On Tue, 7/23/13, Lance <lance@vonprum.com> wrote:
Subject: [GMCnet] Electrical mystery
To: gmclist@temp.gmcnet.org
Date: Tuesday, July 23, 2013, 5:53 PM
I've only had my 74 Palm Beach about two months but this is
my third GMC. I immediately replaced a working buzz box
because it really buzzed, but it was working. I installed a
new Intellicharge 9245 and all was well.
Then the night before last the furnace would not light. It
would try for about one minute and then shut down. The next
morning I noticed that my lights seemed a bit dim and put
two and two together. I presumed the furnace would not light
is because the voltage was below 10.5 volts. I got a volt
meter and went to my new charger to measure the output. It
was about eight volts. So I assumed that the Charger had
failed but when I removed the load the output of the charger
measured 13 volts. I hooked it back up but had to go to
work. Now the furnace still won't light and the voltage
reads about 10 volts. What is going on? No other changes in
my electrical system except I added a rear view camera last
weekend.
What say you electrical detectives? Anyone have a suggestion
other than paying my local mobile RV repair guy $100 an hour
to make me look stupid. You guys can make me look stupid for
free. What, I didn't say that.
Who's got the answer?
--
1976 Palm Beach
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Electrical mystery [message #215465 is a reply to message #215454] |
Tue, 23 July 2013 14:35 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| lance wrote on Tue, 23 July 2013 13:53 |
I've only had my 74 Palm Beach about two months but this is my third GMC. I immediately replaced a working buzz box because it really buzzed, but it was working. I installed a new Intellicharge 9245 and all was well.
Then the night before last the furnace would not light. It would try for about one minute and then shut down. The next morning I noticed that my lights seemed a bit dim and put two and two together. I presumed the furnace would not light is because the voltage was below 10.5 volts. I got a volt meter and went to my new charger to measure the output. It was about eight volts. So I assumed that the Charger had failed but when I removed the load the output of the charger measured 13 volts. I hooked it back up but had to go to work. Now the furnace still won't light and the voltage reads about 10 volts. What is going on? No other changes in my electrical system except I added a rear view camera last weekend.
What say you electrical detectives? Anyone have a suggestion other than paying my local mobile RV repair guy $100 an hour to make me look stupid. You guys can make me look stupid for free. What, I didn't say that.
Who's got the answer?
|
No Lance,
Our job is to make look brilliant to any friends that don't read GMCnet. You write as though you are literate and probably have an IQ over 80 - that puts you ahead of most of the people you could pay for this. And - AND you have this crowd to guide you along.
Question: What Load did you remove that let the converter get back to spec?
It does not have to be something you know you changed or even touched. Sometimes things just happen.
If the converter is charging the house bank, leave it alone and let it get done for the sake of the bank, but disconnect everything else.
Pulling all the fuses in the house bank is a real good idea. It is a real good way to isolate a problem, then you can put two wires on a light bulb (a little one, like from a marker light) and go down the fuses one at a time until it lights (says the guy that has a Fluke 87 and a Bell current probe). That is a circuit that is drawing power. If it is not supposed to be, now all you have to do is find out why it is. If is supposed to be, then turn it off at least until you are done.
If you have pulled a 9245 down to ~8 volts, something should be smoking....
If you put the converter to charging the house bank and with all the fuses pulled that house bank doesn't come real close to 12V real fast, start thinking about your battery.
When you get some new answers, come on back. Someone will be here.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Electrical mystery [message #215506 is a reply to message #215454] |
Tue, 23 July 2013 22:40 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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In my opinion the best place to start would be to disconnect the battery and recharge it with a plain old battery charger if it doesn't take the charge you have a defective battery. A bad battery would make the new converter appear defective.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Electrical mystery [message #215533 is a reply to message #215454] |
Wed, 24 July 2013 09:02 |
lance
Messages: 190
Registered: December 2004
Location: Vancouver, WA
Karma: 0
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Senior Member |
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It was the batteries. Both the house and engine batteries are seven years old and showing only ten volts. I'll replace them later today.
1974 Palm Beach
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