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I am trying to replace a broken switch that controls the rolling up and down of a window on my car. I have the control module out, it looks like this:

enter image description here

The "auto" switch connection on rolling up has been broken. I know this because it rolls down fine, and when I press the switch up and short the switch terminals, the window rolls up.

Anyway, I was trying to replace the switch with an on-off-on DPDT switch, but I realized that the original switch isn't wired that way. Here is my drawing of the original switch connections. enter image description here

So as you can see, it acts more like two ON-ON switches than one On-OFF-ON. My question: Is there a way to manipulate the wiring on a normal switch to get this behavior while still using the one switch, or is there a switch that has this behavior that I don't know about?

I was thinking about alternate solutions. I might be able to make it work with two On-On switches, but it would be a bit confusing to work with if someone didn't know how to operate the window. Thoughts?

Thanks for any help, I really appreciate it!

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  • \$\begingroup\$ The easiest way? Junk yard or Ebay for an original switch. \$\endgroup\$ – Passerby Dec 16 '15 at 23:39
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This isn't a complete answer because I don't know what switches are available to you but the original is probably wired as sketched below.

schematic

simulate this circuit – Schematic created using CircuitLab

Switch and motor circuit. (When will CircuitLab give us a motor symbol?)

Motor direction depends on which contact is actuated.

You could use two SPDT switches to achieve the same thing.

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  • \$\begingroup\$ Thanks! Fortunately, I managed to repair the switch myself. I took it apart and one of the contacts was layered with a black crust. I scraped it off, put it together, and it works like new! \$\endgroup\$ – Gigaxalus Dec 17 '15 at 0:47
  • \$\begingroup\$ Did you put some contact lubricant on the cleaned contacts? \$\endgroup\$ – Michael Karas Dec 17 '15 at 2:23

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