I am attempting to install an after market amp to my Buick and have discovered a curious problem. I can't find a switched power source (like the old-style "accessory" wiring) to connect the remote turn on wire. I am starting to think it may have to do with the Retained Accessory Power (RAP) feature. I have tested fuses in the box under the rear seat to see if power turns on/off depending on whether the key is in the "off" or "accessory" position, or completely removed. They all seem to be constantly powered (except for undesirable fuses for this purpose). The doors were open, which should have disabled the RAP My first instinct was to stick the remote on wire from the amplifier to the fuse corresponding to "stereo," but it seems to have a constant source of power. This would undoubtedly drain the battery, given the amplifier'* higher current pull.

Any ideas for finding switched power in this car?

I'd really prefer not having to wire a switch: it would look messy and be something to remember to turn off.

I figured I'd try and look for ya, since I'm already digging through the schematics on my 04 LeSabre FSM, looking for a fix for my heated seats.

Only thing I see right now that is hot in acc or in run, is an orange wire off the ignition switch itself. It runs to the ACCY relay #34 in the underhood fuse block. It shows no connection from the lock position or the unlock position on the switch, which I take it to mean that the DIM (or what actually controls the RAP) isn't directly acting on it.

I could be wrong though, but looks like something you could test to see if it fits what you need it to do.

Thanks for the help! I'm about to head out to the car and I'll look for the orange wire. (I'm also gonna check out that headlamp switch from the other post.) I'll report back on both threads as I make progress.

I really appreciate you taking the time to respond!

Ok. I've been rootin' around looking for an easy way through the firewall to run a wire from the engine compartment fuse block. There doesn't appear to be one. I started looking in the trunk (where the wire needs to go) and found the Rear Integration Module. Now I'm dying to know if there'* an ACC wire input to that module. That would make this job MUCH easier. Does anyone have info on what wires feed the Rear Integration Module (RIM) and if any of them are ACC? Further, any leads on ACC wires closer to the trunk than the engine compartment would be great.


Thanks!