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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 07-26-2008
gcyeaw's Avatar
gcyeaw gcyeaw is offline
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Default Glass fuse panel

I was helping the new owner of my 78 FC today to trouble shoot a turn signal problem. We discovered a blown glass fuse in the front overhead compartment ( which wasn't the problem ), but can't find the panel on any of the diagrams. A new fuse blows right away, so something is shorted, but what? It is a five fuse panel to the right of the breaker panel below the A/C condenser solenoid. Does anyone have a diagram of what each of these fuses are for?
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  #2  
Old 07-27-2008
konehd konehd is offline
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Hi Gardner,

Its sure strange that this basic info isnt provided with the coach!
Ive looked for that kind of info and wiring diagrams for the ignition and other circuits and its just not to be found!

One trick you can use is to put a light bulb in place of the fuse and use that as an indicator when looking for the short. if the light goes out when your wiggling wires or throwing a switch thats the circuit that is shorted.


HTH, Joe
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  #3  
Old 07-27-2008
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gcyeaw gcyeaw is offline
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Joe,
Thanks for the tip. One trick I learned is to put a bulb and a turn signal flasher in place of the fuse. Then use a little compass to trace the wire. When the flasher is on, the current in the wire will deflect the compass needle. It is a nice way to trace wires in the wall or other hidden places.

Of course I could resort to a more modern signal injector, but that isn't as effective on a dead short.

Then there is the final method, figure out what's not working!

Gardner
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86 PT-36 Golden Memories
83FC35 SB $IXTEEN TON$ SOLD
78 FC 33 Happinest (Sold)
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  #4  
Old 07-27-2008
konehd konehd is offline
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Thats a good idea!...

You can get the phone type toners pretty cheap now though, I carry one with me just in case. Came in handy when I was tracing the wiring on the cruise control.

Good luck!

/Joe
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Still having fun- even though the the BlueBirds Away!
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  #5  
Old 07-28-2008
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Quote:
Originally Posted by konehd View Post
Thats a good idea!...

You can get the phone type toners pretty cheap now though, I carry one with me just in case. Came in handy when I was tracing the wiring on the cruise control.

Good luck!

/Joe

Joe,

How about sharing your source for the toner, with the rest of us.
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I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
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  #6  
Old 07-28-2008
konehd konehd is offline
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Hi John,

Ebay has some with a buy it now of ~$23. Probably cheap made in china though. See item #130241798057...

Looks like you can get a better one for about $50 there.

I got mine at the electronic swaps near San Francisco... Dosnt help you guys in the east though!

HTH, Joe
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'93 WB40, Alligator - Sold
Sedona, AZ
Still having fun- even though the the BlueBirds Away!
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  #7  
Old 07-28-2008
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iamflagman iamflagman is offline
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Quote:
Originally Posted by konehd View Post
Hi John,

Ebay has some with a buy it now of ~$23. Probably cheap made in china though. See item #130241798057...

Looks like you can get a better one for about $50 there.

I got mine at the electronic swaps near San Francisco... Dosnt help you guys in the east though!

HTH, Joe
Thanks Joe.
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JOHN FINN
FORUM MODERATOR-ADMINISTRATOR
1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
Visit the WILD HARE RACING website
REMEMBER 9/11
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  #8  
Old 07-28-2008
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I got an "economy" toner when I was having trouble tracing a dead wire. Bought it at a Home Depot. Paid around $30 for it.


On the road at Taulatin Oregon
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  #9  
Old 07-28-2008
Stephen Stephen is offline
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Check the contact in the lights they can twist and become mis aligned touching the base of the fixture causing a short
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  #10  
Old 07-28-2008
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For those interested in making their troubleshooting easier when it comes to wire problems and AC problems I suggest a couple of tools that I bought years ago. They can be bought at www.homedepot.com or their local store.

They are a Gardner Bender Ground Fault Indicator Tester Model GFI-501A for $7.87. Plug it in any 110VAC electrical receptacle and you can instantly tell if it is wired correctly or what exactly is wrong with it. Plug it into the power pedestal at the campground site BEFORE you connect the cable to your coach.

Also a Gardner Bender Wire tracker model GET 4110K
It allows you to quickly trace unenergized wires of any kind and emits a tone of varying intensity as you get closer or farther from the wire. It consists of a transmitter and receiver in one tool. Pull the transmitter out and connect the alligator clips to the wire you are interested and turn the receiver on and start running it over the wire until you find the other end. Many times I have connected the transmitter in the rear of the coach and found the other end easily at the front of the coach. Its worth every cent the first time you use if. Its a powerful tool.

Right now on Ebay there are 3 GET-4110K for $39.95 (this is a buy it now price) which includes postage. This is normally at least $30 or more from home depot.
Item number: 290246528176

The ground fault detecor on ebay Item number: 300237924111 for buy it now for $6.48

Everyone should have these two tools.
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