roll up / down windows silverado 05

I try to install two roll up/down window modules to the front windows of a cuad cab silverado but it does not work . I`m wiring in the window motor the problem that i have is the neither of the cable shows ground so when i activate the module for roll up or the one to roll down they provide the + 12 volts but since there is there no ground it doesn`t do anything, so i was think it in installing a set of relays but i dont have but im still working on this idea, any sugestion would be of big help thanks

the brand of the modules is exreme pro they are trigered by 12 volts for the roll up and for roll down i am using extreme that are trigered by ground and thanks for the tip i will try it tomorrow you see i was cheking the truck and it did work again ( there was ground ) but it stoped working again so i got all of the wiring for all the door done and tomorrow i am going to check the relay set up thanks for the tip

also i forgot to add the rear doors worked just fine they are wired just to rool up but they worked fine

i tried the 2nd acc but it didnt work also i tried the relays 2 for each window ( doing the wiring like this 85 +12 volts from roll up/dn module,86 grnd , 30 grnd , 87 to windowso when one cable got +12volts the other was geting -12volt )at first it looked like they work but they shorted , when i was doing the passenger window i noticed that both wires of the window motor where showing +12 volts so when i tried to install the relays there was a few sparks so with my meter i cheked and i got +12 volts at the 2 cables , after doing a check to evrything the +12volts disapeared so i continue to install evrything and it worked a few times but after doing some testing the drivers window did the same thing as the pasenger did and it caused the cables to heat so i disconected evry thing so rigth now i am where i started and i really need to get this done thanks for any help you can give

finally i got it i addes an extra set of relays so when the alarm is armed the motors get disconected from the oem circuit and goes into the circuit that rolls them up and down( 30 to motor 87a to switch 87 to the rooll up dn circuit 85 +12 volt 86 alarm ground when armed) and finally evry thing works as i wanted to thanks for all your opinions and help