Heated Washer Fluid Switch, 07 GMC Sierra

WOW!!! I was way off.... I will get it hooked up this weekend and let you know how it goes. Was I at least right about the switches? And, thanks again.

More explanation on the wiring. Red is power battery, black ground...that's pretty much standard wiring. Green is the input to trigger the unit...the light green at the switch will have a ground on it when pressed. Reading the 611t instructions for the yellow and brown, their connection depends on the type of output (positive or negative). The WHITE/ black (cargo light) is a positive activated light. A positive output is needed, which is the yellow wire. A battery connection is therefore needed on the brown wire. Hope this helps. Mark

OH OK, I think I got this figured out. Lets see, the black at the switch is grounded, when I press the switch it sends the ground signal out through the light green wire. Which goes to the green of the 611T. Then the 611T switches the current to positive, then sends it back out the yellow wire of the 611T to the BCM. Which will send positive power to the light, turning it on. And by doing it this way, we are actually switching the ground at the switch, as it was designed. So no problems with overloading the switch. Am I on the right track???

Ok, I got it done, well kinda. I got all the wires hooked up and it appears to be working right. I still have to hook it to the wire at the BCM though. When I hook up my DVM though, I am only getting about 11.37 volts though. To clarify: volts at the cigarette lighter is 12.04 with the truck off. When I leave the black lead hooked up to the cigarette lighter and test for power at the yellow wire, I only get about 9.5 with the truck off and 11.37 running. Also, if I ground the blue and white wire, the indicator light will come on. So, shouldn't it work with the light green signal wire? Its grounded when on. But, the indicator light wont light that way.

Ok, update. I got all the wires hooked up, and it works just like I wanted it to. Only problem left is the indicator light. If I hook the blue/white wire to ground, it stays on. If I hook it to the green wire, it only stays on while Im pushing the button. Any ideas?

Couple of options. Rewire it on the circuit board...probably pain in the butt. Small relay to invert polarity, or a transistor to invert polarity.

Yeah, I was just thinking about the relay idea. I could use the yellow wire for the hot side, to open up a ground connection. That way it will only be open, or grounded, when the light is on.

Correct...use the relay to convert the positive output to a ground. The relay coil is in parallel with the cargo light, whenever the light is on the relay also activates.

I must be getting good at this electronic stuff.....or maybe just lucky! I will get the relay installed tomorrow and report back. Thanks again for all your help.

It works, it works, it works!! It does just what I wanted. Hit the button, and the led indicator light and the cargo light come on. Hit it again and they both go off. Thanks for all your help. Im sure for most of you guys this would have been a no brainer 10 minute job. But this was a little more than my normal "just throw a switch in there" jobs. Thanks for everything.