Power accessory draw issue
Thread Starter
Teching In
Joined: May 2018
Posts: 35
Likes: 6
Power accessory draw issue Hey all, I've used this forum for a lot of info in the past and made an account to ask for help on something I just can't figure out. I have a parasitic draw I've narrowed to the power accessory fuse, have a .140 draw verified on my multimeter ran inline. I've disconnected everything I know of that runs off that fuse, power mirrors, radio, hatch, shock sensor, took the cluster out, unhooked my BCM, nothing diminished the draw. Does anyone have a wiring diagram so I can start tracing wires or does anyone have a suggestion on what else to check? I'm a mechanic with ten years experience btw, I know my way around a car but this has me stumped. Thanks
Joined: Nov 2003
Posts: 11,328
Likes: 345
From: Jacksonville, FL (originally from Toronto Canada)
There is no single wiring diagram in the factory manual. There's a schematic showing the fuse getting power from a fusible link and then going out to splice S211 in the harness but beyond that you have to look up each affected circuit separately. For example, the only connection to the instrument cluster is to provide power to the security light which then gets its ground at the BCM courtesy of the VATS circuit. In fact, almost everything involved is related to the BCM except the mirrors and radio memory. The hatch release is a relay controlled by the BCM. The parking light relay, shock sensor, and security light in the dash are all part of VATS and the optional alarm system in the BCM. I don't see anything you've missed so it seems really odd that the draw continues even with all those things unplugged.
I've heard that these schematics are available on Autozone's website if you sign up.
I've heard that these schematics are available on Autozone's website if you sign up.
Thread Starter
Teching In
Joined: May 2018
Posts: 35
Likes: 6
I know I don't understand how the drain won't stop with all of the components unplugged and nothing after market installed. I'm about ready to put that fuse on a toggle and just toggle it off when not in use for a few days
Like Whitebird points out, you can get the schematics, they are just on multiple pages that you have to piece together. (This one has a lot of branches.) Autozone definitely has all the factory schematics if you register on their site.
