What fuses power the rear wiper on this diagram?

Two RR WPR fuses: a 15 A fuse in the I/P fuse block (hot in ACC and RUN) and a 25 A fuse in the underhood fuse block (hot at all times).

What wire color and circuit number feeds constant power to the rear window wiper module?

A 1 ORN wire, circuit 2040, from the underhood 25 A RR WPR fuse to terminal B (BATT) of the Rear Window Wiper Module.

Which wire carries the liftgate ajar switch signal to the BCM?

A 0.35 PNK/BLK wire, circuit 1303, from splice S910 to BCM pin A1 of connector C6.

How are the liftgate ajar switches grounded?

Each ajar switch (Liftglass, Liftgate Left, Liftgate Right) grounds through 0.35 BLK 1450 wires to splice S911, then via 3 BLK 1450 wires through C900, P900, C499 and Splice Pack SP410 to ground G410B.

Where does the rear window washer fluid pump get its ground?

Pump terminal A goes to ground via 0.5 BLK circuit 150 to splice S100, then 1 BLK 150 to ground G100.

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Chevy Tahoe Rear Wiper/Washer Wiring Diagram – Motor, Switch & BCM Circuit

GM rear wiper/washer control wiring schematic with BCM, liftgate ajar switches

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Rear wiper/washer control wiring diagram: BCM, multifunction switch, rear window wiper/washer module and pump, liftgate-ajar switches; fuse 15A (wash) and 25A (RR wiper), circuit 1303 PNK/BLK.

AI caption December 2011 · Photo 10 of 15

This document is a factory-style wiring schematic titled "Rear Wiper/Washer Control," uploaded to the gallery of a 2004 Chevrolet Tahoe. It traces the rear wiper/washer circuit from two power sources: a 15A RR WPR fuse in the I/P fuse block (hot in ACC and RUN, feeding 0.5 YEL wire 343) and a 25A RR WPR fuse in the underhood fuse block (hot at all times, feeding 1 ORN wire 2040). The 15A feed powers the rear wiper/washer switch in the Multifunction Accessory Switch (Wash, Pulse 1, Pulse 2 positions). Outputs run through wires 0.5 DK GRN 392 (pulse), 0.5 GRY 391 (wash), and 0.5 DK GRN/WHT 266 to the Rear Window Washer Fluid Pump, grounded at G100 via wire 150. The Rear Window Wiper Module receives Wash (D), Pulse (C), BATT (B), and Ajar (A) inputs and grounds at terminal E. The Body Control Module's Liftgate Ajar Switch Signal (0.35 PNK/BLK 1303) branches at splice S910 to Liftglass, Liftgate Left, and Liftgate Right ajar switches, which ground via 0.35 BLK 1450 wires through S911 and Splice Pack SP410 to G410B. Connector IDs, pin letters, splices (P100, P900, S910, S911), and connectors (C119, C104, C209, C499, C900, C901) are all labeled, with a note distinguishing C119 (w/o YE9) from C104 (w/YE9).

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Frequently asked questions

What fuses power the rear wiper on this diagram?: Two RR WPR fuses: a 15 A fuse in the I/P fuse block (hot in ACC and RUN) and a 25 A fuse in the underhood fuse block (hot at all times).
What wire color and circuit number feeds constant power to the rear window wiper module?: A 1 ORN wire, circuit 2040, from the underhood 25 A RR WPR fuse to terminal B (BATT) of the Rear Window Wiper Module.
Which wire carries the liftgate ajar switch signal to the BCM?: A 0.35 PNK/BLK wire, circuit 1303, from splice S910 to BCM pin A1 of connector C6.
How are the liftgate ajar switches grounded?: Each ajar switch (Liftglass, Liftgate Left, Liftgate Right) grounds through 0.35 BLK 1450 wires to splice S911, then via 3 BLK 1450 wires through C900, P900, C499 and Splice Pack SP410 to ground G410B.
Where does the rear window washer fluid pump get its ground?: Pump terminal A goes to ground via 0.5 BLK circuit 150 to splice S100, then 1 BLK 150 to ground G100.