Originally Posted by benullman
I would replace it. For $6-7 it usually wears out with all that voltage passing through it
Right Idea, Wrong Reason.
Somewhere between 12 and 14 volts are all that passes through a dimmer switch,
What kills them is the AMPERAGE they have to deal with when the connections are made and broken internally.
The AMPERAGE is what kills the contacts.
You were VERY close!
Most people think they die because people yank or stomp on them too hard!
The last one I changed must have had an ounce or more of mud in it when I took it apart!
No wonder they only last about a year for me...
The dimmer switch usually goes out because it's on the floor board and gets a TON of abuse from dirt, moisture, ect.
The switches in the GM columns are too small to do the job correctly, too small of contacts for the current they have to deal with,
And the contacts are made from the wrong stuff to live...
Along with all the dirt, dust, moisture, mouse poop, ect that gets into them.
Consider putting your head lights on Relays so a lot of current doesn't have to go through those already overworked switches?