Light confusion

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Dave Downs
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Light confusion

Postby Dave Downs » Sat Aug 27, 2022 3:17 pm

Headlights work fine, rear light is a problem.

6 volts, grounded through the frame.

I have power to outside connection (back of light housing) power to inside connection (inside light housing), attach reflector, power to the button that connects to bulb. Install bulb, turn on switch, ground reflector, no light.

Undo pigtail to inside connector, ground reflector, hot wire pigtail to power, bulb lights up.

Rewire pigtail to inside connector, turn on lights, test light to ground, touch reflector with test light probe….test light goes on.

If grounded test light is on when touched to the reflector that indicates the reflector is ‘hot’ and if I touch ‘hot’ reflector to ground I should get sparks but I don’t - and reflector is supposed to be grounded to complete circuit for light.

I hope my explanation makes sense because what I’m seeing makes no sense at all.

Gary Dotson
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Re: Light confusion

Postby Gary Dotson » Sat Aug 27, 2022 8:07 pm

Your light is not grounded, address the light mounting.

tst
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Re: Light confusion

Postby tst » Sat Aug 27, 2022 11:57 pm

think it was grounded from the factory to one of the mounting bolts for the light

Dave Downs
10+ Years
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Posts: 50
Joined: Sun Jul 17, 2011 10:19 am
Zip Code: 18923
Tractors Owned: 1937 F-20
1944 M
H w/Heisler OD & disc brakes
C
C w/Fast Hitch
SC w/Fast Hitch
450

Re: Light confusion

Postby Dave Downs » Sun Aug 28, 2022 8:20 am

Re-checked every thing this morning, light had a good ground.

Connected light to hot wire from switch.....light now works!! I changed nothing......

Jim Becker
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Re: Light confusion

Postby Jim Becker » Sun Aug 28, 2022 12:31 pm

After handling it enough, you finally established a ground at whatever point it was missing. It might last, might not.

ajhbike
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Re: Light confusion

Postby ajhbike » Mon Aug 29, 2022 5:42 am

Personally, I am done with the housings or bolts creating grounds. I run a ground wire to every light on all 7 tractors all models and makes even if it means drilling into the reflectors and using a tiny bolt which you can't see anyway. Headlights, tail lights, flood lights...especially the flashers. Eventually they all need jiggling and cleaning and it always happens when it is night and I have to plow in a storm.

inairam
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Re: Light confusion

Postby inairam » Mon Aug 29, 2022 9:34 am

I use conductive electrical grease on the mounting threads and connection points and a little between the reflector housing. It helps a great deal. I did not want to run a wire.
When you only have 9 horsepower you need to know the names of all of the ponies!

Larry in WNY
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Re: Light confusion

Postby Larry in WNY » Sun Sep 18, 2022 7:01 pm

Sometimes the best thing to do is add a separate ground wire for each light. I use a large ring terminal on the light mounting bolt and run to a fender mounting bolt . Chasing bad grounds can make you lose your mind at times.


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