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| | | | Joined: Feb 2019 Posts: 4,472 AD Addict & Tinkerer | | AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,472 | I just purchased a NOS headlight switch for my ‘52 and the dimmer acts like it’s dirty. The resistance coil is not broken and looks fairly clean. I doused it down with DeoxIT (contact cleaner) with little success. I also ran a piece of 400 grit paper on the wiper then used a small wire brush on the sections I could reach with a Dremel. It improved but still is intermittent. What's the best way to clean the resistance coil?
Last edited by Phak1; 06/03/2026 11:46 AM. Reason: Typo
Phil Moderator, The Engine Shop, Interiors and Project Journals1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc BrakesProject JournalsStovebolt Gallery Forum | | | | | Joined: Oct 2021 Posts: 6,691 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,691 | I tried everything on Ol' Roy and The Bismarck.
After no success with either one dimming or brightening the dash consistently, I wired the dash lights directly to the taillight terminal so the dashboard is always lit at full power whenever the taillights and headlights are on.
Of course I can't remember a single time in my life that I ever thought the dash lights were too bright and needed to be turned down. All my vehicles' dash lights are always turned up to full brightness.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| | | | | Joined: Mar 2010 Posts: 10,270 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,270 | I like Otto's plan of hot wiring for full brightness.
I have the same mentality for stuck seat adjusters, as long as I can get the seat to be stuck all the way back.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Mar 2014 Posts: 4,478 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,478 | Please make sure you have decent pressure on the coil from the wiper. If the wiper just loosely contacts the coil this can happen.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
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