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light fuse..etc.

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johntexas
5+ Years
5+ Years
Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

light fuse..etc.

Postby johntexas » Tue Jul 22, 2014 9:27 am

I got my 1953 Cub about 90% restored (I thought) about 2 months ago. When I turned on the headlights the 20amp fuse blew. This is about the time I realized the gas tank needs cleaning and sealing, plan is to use RedKote, good time to change the fuse. Got the hood/tank off and set aside and replaced the fuse. Remember the headlights are off and on the hood. No matter where the switch is, both sides of the fuse are hot? I can't imagine needing the lights bad enough to do this again. If I need to ask a question here it would be "what the"?
Gas tank. This is gonna be good............
There is a screwdriver stuck under the baffle, I can see the blade and it won't move, guess it will get the RedKote treatment as well? For you most knowledgeable Cub buffs, is this where the tool box is located, if so where are the other wrenches? Can I at least get a grin out of that one.
Thank YOU for the help past and future................ John

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Jim Becker
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Re: light fuse..etc.

Postby Jim Becker » Tue Jul 22, 2014 9:57 am

I'd do my best to get the screwdriver out. Left in, it will provide more opportunities for the RedKote to not get a complete seal.

You probably have some wires improperly connected to the light switch. Recheck according to this diagram:
Image

johntexas
5+ Years
5+ Years
Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

Re: light fuse..etc.

Postby johntexas » Tue Jul 22, 2014 10:17 am

fuse should not be hot on both sides should it? The 0 on the switch stand for OFF?

Eugene
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Re: light fuse..etc.

Postby Eugene » Tue Jul 22, 2014 10:42 am

johntexas wrote:fuse should not be hot on both sides should it? The 0 on the switch stand for OFF?
Hot as in temperature, No.

If by hot you mean voltage, then yes, both sides of a fuse will be hot. In the wiring diagram Jim provided, the L terminal on the voltage regulator is battery voltage. A wiring trace will show battery voltage from the L terminal, through the fuse, up to the light switch. Even with the light switch in the off position.
I have an excuse. CRS.

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John *.?-!.* cub owner
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Re: light fuse..etc.

Postby John *.?-!.* cub owner » Tue Jul 22, 2014 1:55 pm

While you have it where you can get to it, auto parts stores carry small circuit breakers that will clip into the fuse holder if it is the one on the back of the light switch. fuse holder mounted in the dash though has to have the standard SFE 20 fuse.

storing your tools in the gas tank reduces the chances of loosing them. Unfortunately you have to turn it upside down and shake it to get them out. 8) As close to a grin as I can handle today.
If you are not part of the solution,
you are part of the problem!!!

johntexas
5+ Years
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Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

Re: light fuse..etc.

Postby johntexas » Tue Jul 22, 2014 4:56 pm

Thanks but if I can figure out why it blew I would hope that should do. The back light is not hooked up could that cause it to blow? I now have a diagram but too blurrrrry to read. I'll wade though.
Like to never got the screwdriver and lug nut out from behind the baffle, but did.....now Miller time

Eugene
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Re: light fuse..etc.

Postby Eugene » Tue Jul 22, 2014 5:05 pm

Wiring diagrams are provided in the Maintenance and Operator's manuals.

Fuse blown, short some place. The short is after the fuse. Disconnected lamp, not the problem. Could be a bad appliance or the switch, wire insulation worn, end of disconnected wire touching metal, or ????.
I have an excuse. CRS.

Jim Becker
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Re: light fuse..etc.

Postby Jim Becker » Tue Jul 22, 2014 10:28 pm

Go here to look at the diagram. On this page you can click it to make it bigger.
http://www.atis.net/CubFAQ/cub_faq_2.html#q3

johntexas
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Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

Re: light fuse..etc.

Postby johntexas » Wed Jul 23, 2014 8:29 am

Aha moment
Thanks Jim

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gitractorman
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Re: light fuse..etc.

Postby gitractorman » Wed Jul 23, 2014 9:02 am

Remember, you're dealing with a 6-volt - POSITIVE ground system. So, everything is "hot" when you check it back to the negative terminal on the battery, as you would in a 12-volt - NEGATIVE ground system. Just something to keep in mind....
Cub Cadets 682, 1811, 1864, Simplicity Legacy XL 4x4 Diesel with FEL, 60" mower, 50" Tiller

johntexas
5+ Years
5+ Years
Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

Re: light fuse..etc.

Postby johntexas » Wed Jul 23, 2014 10:54 am

GREAT...learning more and more and more and more
I have a 12 volt system
The plot thickens

I don't have the headlights on her but both sides of fuse has power plus juice to headlight wires and fuse not blown ? Go figure

outdoors4evr
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Re: light fuse..etc.

Postby outdoors4evr » Thu Jul 24, 2014 6:44 am

Any fuse that is not blown should show the same voltage on both sides of the fuse.
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Hengy
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Re: light fuse..etc.

Postby Hengy » Thu Jul 24, 2014 7:15 am

It's not clear from your first post, so I am going to ask what seems to be a stupid question. You blew the fuse when the hood was mounted and the lights wired up, correct? If you blew it then, it must be a short in either the headlight wire or internal to the headlamps themselves. I blew a fuse on Merlin one time after reassembling the hood to the dash because the resistor that gives the "dim" lights was touching the bottom of the gas tank. My resistor needed replacing because it uncoiled a bit and was allowed to touch the tank.

As others have said, the fuse holder should be hot on both sides of the fuse at all times. It is the infeed to the rest of the electrical system...coil, lights, but NOT the starter)

Mike
Mike (Happy as a Lark in Allison Park, PA)
Image Image

Check out my Restoration Thread (1955 Cub, Lewis)

johntexas
5+ Years
5+ Years
Posts: 21
Joined: Fri Jul 18, 2014 10:18 am
Zip Code: 75069
Tractors Owned: 1948 David Bradley
1953 Farmall Cub
1976 JD 650 compact
Location: McKinney TX

Re: light fuse..etc.

Postby johntexas » Thu Jul 24, 2014 3:54 pm

Thanks again and again
Mike the fuse blew first when the hood and lights were on the Cubby. I traced the wires from Jim's diagram and all seems good. Hood and tank (since this is one and the same shouldn't it have its own name, like hank or tood) were sent to radiator shop so I replaced the fuse and have power to both sides of the fuse and to the headlight wires. I guess the next thing is replace the HANK and hope for the best. Thanks for all the responses..!

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Hengy
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Posts: 7153
Joined: Sat Feb 18, 2006 8:12 pm
Zip Code: 15101
eBay ID: lacrosseorgans
Skype Name: Mike.Hengelsberg
Tractors Owned: 1949 Cub "Merlin"
1955 Cub "Lewis"
Cub Trailer
A-60 Blade
Cub-22 Mower
193 Plow
Circle of Safety: Y
Location: PA, Allison Park (Am Hengelsberg)
Contact:

Re: light fuse..etc.

Postby Hengy » Thu Jul 24, 2014 4:54 pm

That leads me to believe even more that your resistor wire (the coil on the light switch) grounded to your HANK (tank/Hood) and shorted out the system. If you have power to the fuse and turn the switch on with nothing hooked up to it, then the wires are not shorting to the body of the tractor. The other thing to consider is an internal short inside the light itself. Don't recall the cutoff, but does the '53 Cub have pancake lights? If it has teardrops still, then check to make sure that the internal wires are not touching the metal inside the housing. That'll cause a short, too. If a pancake light, the same thing applies. If your bulbs have internal connections, make sure that they are not touching the housing.

Just some more things to check!
Mike (Happy as a Lark in Allison Park, PA)
Image Image

Check out my Restoration Thread (1955 Cub, Lewis)


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