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Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1337109 Mon Dec 09 2019 10:53 PM
Joined: Aug 2017
Posts: 295
S
Shaffer's1950 Offline OP
Shop Shark
Forty9,
Remove bulb.
Just below bulb is the mercury switch.
Use a magnet if it's mounted on hood. Or turn it upside down, it should just fall into your hand. See my first post picture of my hand. That is the mercury switch.
Todd

Attached Files
20191205_170511.jpg (155.06 KB, 141 downloads)
20191205_170500.jpg (145.05 KB, 141 downloads)
Last edited by Shaffer's1950; Mon Dec 09 2019 11:05 PM.
Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1337179 Tue Dec 10 2019 05:32 AM
Joined: Dec 2003
Posts: 3,938
S
Sedgewick Offline
Shop Shark
Exactly. Don't think my unit is a Hobbs as it doesn't have an in line fuse. My mercury switch is rounded on one end, with a pip or nipple on the other. If anybody can find a source for these let us know.


"Sedgewick"
1949 Chevy 1/2-Ton
1989 Caprice

Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1337247 Tue Dec 10 2019 11:46 PM
Joined: Apr 2008
Posts: 750
F
Forty9 Offline
Shop Shark
Unfortunately there is a non-metallic/fiber washer at the base of my light socket with a hole for the bulb positive contact to go through. I hesitate to pry this washer out as it's very tight and I don't want to break it. It is a Hobbs light but someone may have modified it. I can get it to work if I tap on the bulb or housing. Maybe just one of those things. Thanks for the help.


Ed
Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1337901 Mon Dec 16 2019 08:16 PM
Joined: Dec 2003
Posts: 3,938
S
Sedgewick Offline
Shop Shark
Got mine working last Sunday. Pointing up - works. Horizontal its off.

Went for dinner, came back and its not working. Must be those gremlins I see occasionally around my shop.


"Sedgewick"
1949 Chevy 1/2-Ton
1989 Caprice

Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1337977 Mon Dec 16 2019 11:51 PM
Joined: Apr 2008
Posts: 750
F
Forty9 Offline
Shop Shark
I wonder if anyone has a lamp that consistently works the way we expect it to without tapping it or doing something else to get it to work. Maybe we're just chasing our tails.


Ed
Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1338756 Mon Dec 23 2019 12:31 AM
Joined: May 2005
Posts: 6,470
B
bartamos Offline
Master Gabster
Get modern will ya.


I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.


Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1338770 Mon Dec 23 2019 02:29 AM
Joined: Aug 2017
Posts: 295
S
Shaffer's1950 Offline OP
Shop Shark
I do have a 1940's " Homart Fisheye" flashlight that Works too !

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Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1338796 Mon Dec 23 2019 05:48 AM
Joined: May 2005
Posts: 6,470
B
bartamos Offline
Master Gabster
There ya go! Now you can see your motor at night.


I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.


Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1338829 Mon Dec 23 2019 03:47 PM
Joined: Apr 2008
Posts: 750
F
Forty9 Offline
Shop Shark
So it would seem that there are not any Hobbs mercury switch under hood lamps that work consistently.


Ed
Re: Mercury switch/Hobbs hood lamp [Re: Shaffer's1950] #1339469 Sat Dec 28 2019 07:20 PM
Joined: Dec 2003
Posts: 3,938
S
Sedgewick Offline
Shop Shark
Took mine to a long time electronics repair shop. Does radios, TVs with tubes and all sorts of home electronics. He checked the mercury switch and it works perfectly. As it was Christmas week he closed but told me he could fix it. We'll see next week. If anybody can he can.
For those of you with a switch, remove the bulb and look into the socket and tell me if you see one of those brown plastic-type discs sitting on top of the mercury switch. I am sure mine had one but somehow it got out and lost and am wondering if it was meant to insulate the mercury switch body from the bulb.


"Sedgewick"
1949 Chevy 1/2-Ton
1989 Caprice

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