Parking brake fail - any ideas on where to start? Many factors to consider....

[Wmoater]

I’ve got a mess going on and not sure where to start. I took my spyder in for the intermittent sprocket recall. I hit a huge rain storm last week and it’s squealing like a bad fan belt on a car. Let off throttle and I hear a clunk/squeak from sprocket. 3 days later after it all dried out barely no noise. They Didn’t replace the sprocket but put a different pin, replaced a bolt, used the higher torque specs given by BRP made mark and said it needs to come in next couple weeks. Also re mollyed everything. If it rotates 4 degrees or more the sprocket gets replaced even though it met the correct measurements and just a speck of red dust. While there, my insurance warranty part after almost 1 year wait came in so the removed the frunk and replaced the fog left fog light assembly. They call and everything done. I go to pick up and it starts just fine. Release parking brake and the steady brake light comes on won’t release. Shut down, beeps for 20 seconds. Hit kill switch, wait till everything shuts down. Wait for 10 seconds. Turn kill switch back on, turn key,push eco, put foot on brake and start. Starts fine, Release parking brake, and it’s still engaged. Walk inside and ask what’s going on to mechanic. He comes out and we go through process again. Same thing. I say grab a 12mm wrench and let’s loosen the brake, back up and forward and see if something locked. Mechanic loosens brake and I back up, pull forward. Hit parking brake even though it’s not engaged and light goes off and parking brake motor engages for sure. Pulled loose cable forward. We tighten brake back in and test again. Works perfect! Test 2 more times, perfect! Drive to front of store and load into trailer. Turn off and go to turn on one more time and brake light stays on but now I get this ebd malfunction. WaLk back in and mechanic says I’ll have to look at on Friday. It was literally the end of the day. We loosened brake cable and I drove it back in garage. Oil levels looked good he said, we pulled the main relay and restarted. Everything the same. Here’s all the stuff leading up to it I question. Could battery since it was removed with frunk need retightened? It engaged fine 3 times after it was removed and tightened, so to me it’s possibly the brake motor? The parking brake dash switch was replaced, when I hit the deer originally last October. The original dash switch was busted and crushed so it could be the new dash switch, don’t think so but maybe. I’m sure he’s going to charge me for the diagnosis even though it went in fine and he parked it yet it was broke when I tried to move it. Not sure if the recall removes or loosens rear wheel but maybe some sensor moved. My feelings, add a spoon of brake fluid, retighten battery, loosen parking brake and maybe wipe the little switch by the cable wheel on the right side to make sure there’s no dirt in there, assemble and test again. If not it has to be motor or dash switch correct? I can hear the relay click as I push the dash switch but nothing moves on the cable wheel. What would cause the EBD malfunction? Strange it worked fine and then that error.