using 1 ouput channel to control 2 func

im trying to find the best way to use 1 output channel to control 2 different fuctions without using a channel expander. i was thinking of using a timer relay and set it up so when you unlock the vehicle that will activate the timer relay for lets say 5-10 seconds, when the timer relay is activated my ouput channel will control the power lift gate on a minivan, and after the timer relay is deactivated that same output channel will control the power sliding door. relay configuration like this 85= +12 86= neg.unlock from remote starter unit 87= channel 2 output from remote starter 87a= to power sliding door 30= to power rear lift gate does anyone foresee any problems with this? im trying an easy way to do this using a timer relay i have laying around so i dont have to order any new parts.Mike Battaglia

Specialized Car Audio

Bensenville IL 60106

86 = +12v 85 = (-) domelight supervision output (typically a 30 second output upon disarm) 87 = to power liftgate 87a = to power sliding door 30 = ch 2. output