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Click on image for the lowdown. 
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| | | Forums66 Topics128,035 Posts1,055,445 Members48,422 | | 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!
| | | | Joined: Jul 2008 Posts: 176 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2008 Posts: 176 | It reverses the polarity of electricity going thru the ignition points, supposedly to reduce wear. It is mounted on top of the starter and is pressed every time the engine is cranked. It proved to be more trouble than it was worth and most were removed when they failed. The only reason I run one is for originality's sake. | | |
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