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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Oct 2008 Posts: 283 Shop Shark | | Shop Shark Joined: Oct 2008 Posts: 283 | I have a 1958 stepside with a 283. When the heater fan switch is set to low or medium, the resistors on the back of the switch glow red. Is that normal? It's a standard heater arrangement. | | | | | Joined: Dec 2002 Posts: 3,374 Moderator - The Electrical Bay | | Moderator - The Electrical Bay Joined: Dec 2002 Posts: 3,374 | Just a WAG, but no they should not be glowing red... it sounds like you have a short back there.
Another quality post.
Real Trucks Rattle
HELP! The Paranoids are after me!
| | | | | Joined: Mar 2014 Posts: 4,208 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,208 | The resistors? Do you mean the coiled resistor wire? If that's glowing, then it is a sign of something wrong...I'd suspect the armature grounding out possibly.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: May 2005 Posts: 8,988 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,988 | They do typically get VERY hot but don't know about actually glowing red. You know those older portable bathroom heaters glow red, why? They are basically resistors. As in: A coiled element array. Just inspect the switch and it's coils to see their solder joints and if they are supposed to be separate, coils not touching. I agree with Rusty Rod and Jon's assessment.
Motor possibly dragging, squirrel cage dragging, shaft bearings need oil drops | | |
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