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Smoove1010 Smoove1010 is offline
Smoove1010
 
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Join Date: Jan 2012
Location: Long Island, NY
Posts: 734
Garage
The Plot Thickens...

Using methodical, scientific troubleshooting sprinkled with some trial and error, here's what I learned:
- It's the power window relay causing the parasitic draw. Confirmed that the relay was clicking when the battery was connected. Pulled the relay out, the draw went away;
- While the relay was out, tried the windows for kicks - they worked! Even with the PWR removed, the windows went up and down. Pulled fuse 1, they still worked! Scratch head!
- Even when fuse 1 is pulled, the red/blu wire is still energized. Bentley schematic 970-42 tells me that it should only be energized if the black wire on the other side of that fuse is energized by the relay. Scratch head again!

I start thinking that a PO bypassed the relay altogether, but I could not find any obvious signs of a jumper. Admittedly, I'm no wiring expert and it's very hard to see anything in that tangle of wires that weaves around so many other parts of the car.

I find another clue: When I pull fuse 2, the red/blu wire goes dead. With fuse 2 out, I replace fuse 1 (with the PWR installed) and window function returns to normal! They operate only with key in and on; when key is removed, windows work until the door is open. At least I know the relay and contact switches are good. But why is the red/blue wire getting voltage when fuse 2 is in place?

Fuse 2 is for the "seat adjusters" and "booster fan" according to the fuse panel label. I noted on the "Seats" schematic 970-44 that both the red/blu and red (always hot) wires have close proximity. I'm wondering if they are crossed somewhere in the seat adjustment system. Also noted two symbols on the schematic labeled "J/C (Blue Tape)" and "J/C (Red Tape)" - what are they? Below J/C (Blue Tape) there appears to be a connection between the red/blu wire and a red one - am I reading that right?

Could a malfunction or short in a seat adjuster system cause the window circuit to be energized?

Thoughts and suggestions welcomed as always...

Thanks,
GK
Old 01-24-2015, 02:05 PM
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