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Click on image for the lowdown. 
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12 members (1955 1 Series, TUTS 59, wilbur53, 3B, mick53, RdsLessTaken, carbking, DaveV, Gdads51, Joe H, tclederman, KEVINSKI),
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Global Mod,
Mod | | | Forums66 Topics128,281 Posts1,058,473 Members48,490 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | If your powering your timing light from a 6v system and it's a 12v light it may fire but it probablly can't be counted on. They generally are designed witn a voltage regulator to operate between 10v to 16v.
A coil is about twenty bucks at Auto Zone tax inclulded. That is the best way to check if you have a bad coil. A resistance check only checks the continuity of the windings, they can be ok and still cause problems like arc over when they get hot. A bad coil can cause lots of odd problems especially when they are hot.
DG
Denny G
Sandwich, IL
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A good Tech Tip
