Just did an engine swap. Don't remember unplugging anything there, but there's an unconnected orange multiplug under the reservoir. What's it for???

 

Perhaps something came loose from underside of fuse panel.

 

I'm fairly certain it goes to SLS. Compared it with another 04...only difference being he had SLS and I did not and his was plugged in and follows the frame rail all the way back to the rear axle. Can't find that plug anywhere in the RAVE though.

 

My 99 that had SLS has it plugged up, but my 04 with stock coils there's nothing plugged into it. Not positive that it's an SLS plug or not though, but it sounds like it.

 

Here's the pics (taken with the reservoir removed from cradle):

 

Learned a month after buying it that I didn't have SLS either, and I have the same plug UN-plugged.

 

Perfect! Now change out your dexcool for the yellow stuff

 

Actually, I did a flush and change when I changed my Thermostat to Motorad 439-180. The overflow bottle is stained orange, so you cannot really tell. I now run a very comfortable 195 degrees most of the time.

I used this:

 

Here some SLS system plugs for that area - go to the valves. Would have to verify by connector end layout and wire colors. Attached. C0377-C0391