I've got a blank spot beneath my trunk release and I have installed a switch with the intent of disabling my wipers when not needed as the wipers drive me nuts! My original plan was to interrupt the white wire going to the control but when I cut it I still had partial wiper control so obviously there is some power looping back from the wiper module. Any thoughts on a simple place to disable this circuit? Maybe a ground lead or something else? If I have to interrupt power to both the module and the control I will have to put in a relay, of which I am not opposed to but am looking for something simpler. Thanks!

Never mind. Just went with a relay on the output side of the fuse box. Ran negative control to a switch I mounted in the trunk release panel. Looks like it belongs and my wipers are disabled except when I want them on.

Sounds like a plan. Pics?

^ Yeah, what he said!

Not sure what you guys need for a picture. Basically I put a 40 amp relay that I picked up at Autozone in line with the power circuit for the wipers. I cut the two white wires on the back of my fuse panel, soldered in the relay between the now two sets of white wires. I tied the hot lead of the relay to one of the white wires on the fuse panel side and the ground to a switch in the trunk release panel, also from Autozone. One side of the switch went to the relay, the other to a sheet metal screw that I drilled into my front fire wall.
Now my wipers are only enabled when the switch is on. At all other times they are disabled. Since the wipers are on the accessory circuit the relay only has power available to it when in acc or run.
Hope that helps.

Yes, that's helpful. I wouldn't have thought of the relay. It does sound like a very simple and effective solution. The picture would be of the switch that 'seems to belong there.' I find it difficult to add switches, etc. without making things look hacked up and improvised. The namesake SE has a blank space under the trunk release, but the GT doesn't. Just curious in other words.

I'm pretty much a noob when it comes to electrical, but what is the purpose of the relay? Why wouldn't a switch on the power do it?

It's because of the current involved. The wiper circuit is 25 amps and a small switch would just melt at those levels. The relay is designed to handle higher loads safely.