| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,026 Posts1,055,406 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!
| | THANKS!
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: Oct 2016 Posts: 496 Shop Shark | | Shop Shark Joined: Oct 2016 Posts: 496 | 1950 burb 12v
I recently finished a complete wire harness installation. Part of this install included a reproduction light switch.
When I mounted the switch and pulled it out. The dash lights didnt come on and smoke came out.
I took the switch out of the dash and discovered that the little brass tab that moves around the spring for dimmer had gotten red hot.
I did notice that the dimming function is barely noticeable and the little tab was weak against the spring. I bent the tab towards the spring to make better contact and it hasn't happened again.
Anyone have a similar experience? Any idea what is happening?
1950 SUBURBAN / SCHOOL BUS A.K.A "THE SCHOOL RUST"
| | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | It may be some sort of coating burning off. I assume all lights are working? I believe the switch has a thermal overload breaker. If it does or it's fused, You are good to go. The "spring" is a coil to act as a rheostat/resistance to vary the voltage to dash bulbs, as a dimmer.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | It may be some sort of coating burning off. I assume all lights are working? I believe the switch has a thermal overload breaker. If it does or it's fused, You are good to go. The "spring" is a coil to act as a rheostat/resistance to vary the voltage to dash bulbs, as a dimmer. | | | | | Joined: Oct 2016 Posts: 496 Shop Shark | | Shop Shark Joined: Oct 2016 Posts: 496 | Figured it out.
Had something to do with the dome light being switchable on the light and switchable on the light switch. It would only happen when the lightswitch was grounded to the dash after install.
I disconnected the dome light wire from the dome light peg on the switch and ran it straight to power (fused).
Last edited by windyville1; 02/22/2020 7:02 PM.
1950 SUBURBAN / SCHOOL BUS A.K.A "THE SCHOOL RUST"
| | |
|
|
| |
