The window switches in my yellow car were not only failing to work properly, they were getting downright ugly. So I figured there must be something better.
So I went to Ebay, and searched for "dpdt momentary rocker switch". I found several suitable switches, including the ones in this picture:
They not only look great, but my windows now go up and down twice as fast as with the old switches. These switches are rated at 125 volts and 20 amps, more than enough for the window motors.
Here's how to put them in. First of all, they are a bit wider than the original, so the switch holes have to be filed wider until they just fit.
Here's a bottom view of the switches. The pins are just the right size for 1/4" spade connectors.
You need to cut off the old switch connectors from the window switch wires and put spade connectors on them. The pink and black wires also need a short 2" wire in their spade connectors (two wires in each spade connector). Additional spade connectors go on the other ends of the short wires.
Then plug the wires to the upper and middle connectors of the switch exactly as they were on the original switch. Plug the connector on the short wire coming from the upper left switch pin (sharing a spade connector with the pink wire) to the bottom right pin, and vice versa for the other short wire.
That's all there is to it. If you have trouble with this description, I'll try to do a diagram. The wire colors I quoted are from the 88 Helms manual. Both my Fieros do not have stock window wiring, so my colors are different.