The GM5 module Interior Lights and Windshield Washer
The GM5 module controls other things in addition to the door locks and windows. Two of these other functions are the interior lights and the windshield washer pump. These two functions are not controlled by relays internal to the GM5, but, rather by a solid state driver IC by Infineon. Depending on when the GM module was made the chip is either a BTS734L1 or BTS736L2. This chip is a 2 channel high side driver with 4.8 Amp current capability. One channel is for the windshield washer pump and the other for the interior lights.
The windshield washer pump is connected to the GM5 on connector X332 pin 2 (signal name WP). The signal comes from the IC, pins 17 & 18.
The glove box light, switched front reading lights, left and right trunk compartment lights, gear shift light, cig lighter light and rear pillar switched reading lights are connected to the GM5 on connector X332 pin 3 (signal name VA). The signal comes from the IC, pins 13 & 14.
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