I just installed a/c on my 4 cyl, 86.5 hardbody. My truck was already wired for a/c. I used the factory harness and installed all the parts and charged the system. When I push the a/c button on the dash I get nothing, no light, no a/c. If I by pass the system and engage the clutch direct from the battery, the clutch will engage and the air will cool. It is acting like the system is not getting power. Is there a relay I missed. The fuse is the same fuse as the radio according to the fuse panel and the fuse is good. Any help/suggestions would be greatly appreciated.