using a switch for two things

ok. i am using a 528T pulse relay timer. the switch i am trying to use is this. it gets power with the key on and in accessory. but when i go to start the truck it loses power while the key is in start and then returns to power. it is a factory switch. my question is this. if i put diodes inline with it can i use the switch to close a circuit and not have power with it. is this possible.

You need to explain better if you want help with this. I do not understand exactly what you want to do. You could remove all of the wires and use the switch by it's self.John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !