banging my head, 1 wire, 2 functions

Whats up peeps. here is the deal. I have a dodge magnum and have installed steering wheel shifting thru the clockspring. easy now heres the delema. my car did not come with steering wheels controls so I bought some and modded them to use them just for the buttons. anyway the two outside switches are used to control my shifting up and down. but here is the twist I only have two wires and i want to use one wire for two functions IE: when one button is pressed it is a negative trigger and shifts, when another button is pressed it throws a possitve trigger and triggers my train horns. getting the wire to reverse polarity is easy. and done. here is my issue tho,. I need to wire two relays one for a negative to negative throw and the other for a possitve to possitive throw. wiring the relays are not the issue but not getting feedback is. I am wiring the relays like this Negative pin 85 neg input pin 86 pos pin 87 neg pin 30 output to shifter neg pos pin 85 ground pin 86 pos input pin 87 pos pin 30 output to pos train horn valve,. Im getting feedback becuase the train horn relay has a rest at ground which is feeding back thru to the negative relay I am trying to get rid of the feedback how can i go about doing this. shall i be doing the 1 k cap, and 10k reistor for the triggers? or can someone chime in. remember both inputs are wired together to one wire comming from the steering wheel. and the rest at ground is killing meJon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

Notice the Numbers on the relays. The numbers are correct, their orientation with the actual layout of the relay is not correct. I would use 1n4001 diodes.

What kind of transistors, Can you log onto radioshacks website and get me a part number or two or three,. AS for the relay diagram Ihave done the diode across the coil pols and feeback is still there. Ill try it with different relays since the ones i am using have a built in resistor.Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

hey KP is the diode on r2 backwords or meant to be that way?Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

He meant to draw it that way to see if you were paying attention.  You passed.  It is backwards. 

Yep, I messed up, sorry!Kevin Pierson

the only problem i am having is this. remember the two inputs need to be connected together and then connect to a single wire. that wire throws possitive thru one button and negative thru another on the same wire. when i twist the two inputs together the realys activate. and before I twist the two together it take the opposite signal to activate. Ie relay 1 is supposed to be neg out yet it needs a pos signal to activate. thru the transistor.Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.