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Labor Day Putting down your wrenches or time for
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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!
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| | | | Joined: Aug 2006 Posts: 129 Shop Shark | | Shop Shark Joined: Aug 2006 Posts: 129 | Is the stop light switch different on the larger '39-46 1-1/2 Ton Trucks? I am working on a 1940 WB 1-1/2 Ton and it does not have a pressure operated switch on the master cylinder like the pickups. What do they use or has someone changed this truck? | | | | | Joined: Sep 2006 Posts: 1,997 Big Bolt Forum Co-moderator | | Big Bolt Forum Co-moderator Joined: Sep 2006 Posts: 1,997 | On an AD it is actuated by the brake pedal. Look on the firewall and see if there is a switch with an arm that gets pushed down by the brake pedal. If there isn't one there, see if there are two small holes for mounting a switch. Someone who knows a lot more than me should be posting soon.
A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton | | | | | Joined: Jul 2011 Posts: 26 New Guy | | New Guy Joined: Jul 2011 Posts: 26 | Check to see if on the firewall under the brake pedal (engine side) if there are to bolt holes. I have a 41 and it uses a swing arm style. It is wired so when the pedal is up, the switch is closed.
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