Delayed relay output?

I just wanted to say I've been browsing around the forum for a while reading different items, learning a fair bit from everyone and have liked what I've seen! Now I have decided to join and ask for some help!

I was looking at the diagram below from this site and the one on "Momentary to Constant Output" , is there any way anyone knows that I could use something similar to these (combine them somehow), but using a (7/10sec.) accessory pulse from a remote starter to turn on a 10 minute delay to power up a defrost grid? I was going to hook a relay across the factory switch, but the connections to turn it on properly are internal and I don't feel like breaking open the switch.

If this is possible, what size capacitor would I need to make it stay on for approx 10-12 minutes?

Thanks for any help you can provide.

I will keep reading through the forums to see what else I can find as well!

Jon

Yah, I was thinking of doing that at first as well, but want to be able to control it so it's used only when needed... I've been watching the info in the other guys thread that is in a similar dilemma as me that you posted in too fingaz.

I was hoping there would be some way to get it so its timed longer (the diagram I posted says it will stay on for only 1/2 sec., I need about 10-12 minutes) plus I wanted it triggered by the momentary output on my RS like I mentioned... Unfortunately my output in not programmable, just a 7/10sec. pulse it supplies...

I can post up a pic of the defrost circuit for you if ya want, but the one side of the timed circuit is internal. I even had the switch out and tried taking it about, but don't want to screw it up...

I'll dig it out and show it to ya when I plug in my scanner :)

Thanks

The unit I have is just a cheaper AutoStart unit from Canadian tire... It doesn't have a seperate wire for the defrost nor is it very programable with its options :(

That's what I'm trying to figure out... How to supply power to the actual defrost wire with a relay setup that is actuated with a pulsed output from the RS and is timed for 10 minutes or so (bypassing the factory switch)...