Great image SP...does anyone have an electrical schmatic of how that works? I've fewled around making my own, but keep creating a latching circuit.

Here's one I got from somebody on Speedwake.

People typically use two of the Bosch relays in parallel since they're readily available and cheap. You can get larger DPDT relays but they can be expensive. The biggest reason to use a relay is that low voltages are way more susceptible to transmission losses than higher voltages. Running all that wiring in 8 gauge (back & forth twice for each one) and then finding a switch big enough to work reliably is way more complicated and expensive.

Great post guys...
Dave have you tested that arrangement? I bought a single relay from Radio Shack and figured I could just use it to raise the hatch, and low power on the lower would be fine. The way I read the schematic, when raising terminals 30 & 87a are broken on the energized relay, but shorted on the relaxed relay? this is what messed me up on the Radio Shack relay, as I could never get ground back to lower the hatch.

I was under the impression that one relay was norm off and the other was norm on

Guys, i made that schematic up orriginaly and someone over on speedwake filled i the wire gauges later....the way its wired up the relays always have a ground on them when not energized....its only when you give the relay its trigger does it switch over to the 87 terminal to give power to the hatch actuator...

That makes sense..thanks Wally

Naughty Kitty....you can make a single relay work for what you have in mind....give me a little time and i'll draw up a new schematic for ya......this is assuming that your dash switch is wired like a typical switch and reverses the polarity of the wires when its working.....

ok try this setup....