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Joined: Nov 2004
Posts: 373 Likes: 1
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Nov 2004
Posts: 373 Likes: 1 |
I have a 12 volt timing light that I am trying to use on a 6 volt vehicle (1939 chevy). I have old eyes and the light isn't bright enough. Can I hook the timing light to an external 12 volt Battery, and hook the lead up to the number one spark plug?
VCCA Member 51121
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Joined: Dec 2007
Posts: 4,024 Likes: 99
ChatMaster - 4,000
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ChatMaster - 4,000
Joined: Dec 2007
Posts: 4,024 Likes: 99 |
Yes. That is the way I used my 12 volt light on my 6 volt ‘37.
The inductive lead that clamps around the #1 spark plug wire sends a signal to the light to make it flash. the flashing light requires 12 volts but the inductive wire does not.
Rusty
VCCA #44680
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Joined: May 2012
Posts: 4,374 Likes: 30
ChatMaster - 4,000
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ChatMaster - 4,000
Joined: May 2012
Posts: 4,374 Likes: 30 |
Agreed... i used my 12v lawn tractor battery for my timing light. works great. I also do a connection from battery to chassis to be safe, ground it 
AACA - VCCA - Stovebolt - ChevyTalk
Love the Antique Chevrolet's from 1928-1932
The Beauty, Simplicity, History, and the Stories they Tell
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Joined: Dec 2017
Posts: 133
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Dec 2017
Posts: 133 |
You must connect the 6V battery (chassis) ground to the 12V battery ground else the timing light will likely have issues. I cooked a 12V light by using the battery from my riding mower and not connecting the grounds.
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'31 Special Sedan
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
Maybe I just got lucky but my cheap wally world special light works fine on 6v but I rarely use it any more. Since the timing on these was set for low octane gas I don't mess with it. I set to fastest/smoothest idle and lock it down, way advanced from factory spec. I've not yet had to back it off due to pinging or starter dragging.
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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