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Are all five wires in the connector & attached to the switch? Like I stated earlier the yellow is power for each of the three non master switches, all original grounding is done throught the master & a ring connector on the drivers "A" pillar...So for any window to work the master has to be plugged in & the single switch to that location has to be plugged in..If you run the window from the master power is supplied by the tan wire...


The Yellow wire is the key, it supplies power to all four switches. In the original wiring the three single switches have to GROUND through the master switch to work, but with the relays, the grounding is now through the relay only. Believe me, one of the reasons I did this is the ground prong wire on my master switch was melted pretty good.