This vehicle was great for 10 years and now is giving me its first signs of electrical issues that are testing my skills and patience. I have tried a number of usual fixes to no avail. Need guidance on next steps. Current problems and the suspension issues has gone from intermitent to all the time. Symptoms Roof /Sunroof drain leak putting water onto the driver side floor. Fixed with new tub line and dried floor boards. No more leak, but I cant find any poor connections or shorts via inspection. Brake light has been on for months and fault says to check brake pads for wear. Would this trigger Suspension faults? They have 3mm left and I am ordering parts to replace. Battery was draining dead if I didn't drive the car for 2 weeks. I have put in 3 batteries this year. So I feel I have had some sort of electrical short or drain. Ruled out battery as it is new. Just replaced all brake lights and tail lights to ensure that was not a problem since some were out. Brakelight switch - replaced twice and did not fix, so I have ruled out brake light stoplight switch. When the car ran fine, it would lower suspension every 48 hours. I sensed I had a leak. When I started truck it would air back up and things were fine. I was not getting any faults at this point. The last 2 weeks I get faults. First 10 days were intermittent. It would occur after a long 45 min commute to work. Made me think it was something overheating related. Next day the truck worked fine again. Restarting the car would also clear them and get the suspension back into normal ride height. The last 3 days have become full time faults. The car will not reset and clear and the suspension remains lowered. Narrowed it down to this. The faults and suspension drop occur after I start car and let my foot off the brake peddle. Hold the brake down and suspension airs up fine and compressor turns off when bags are full. I can even drive with foot on brake. Second I let go the faults kick in. I have started car and manually controlled brake light switch with my finger. When I press switch, then the faults all come on. Faults are the HDC fault (left and right suspension warning lights), Lowered Suspension, Transmission fault. Should be noted that the Transmission Fault (note) has displayed for 7 years. Never seen an issue. I was told this would go away or would disappear after a battery reset. Never saw a transmission problem during this time and this occurred after they replaced bags and compressor at dealer 7 years ago. Last week when the intermittent faults were coming up, I got one notification on the dash that said something about suspension lowered until system cooled down. That also tells me something was over heating. Only got that notice once and now what ever it is has completely failed. [Lastly] Check engine light came on with fault codes for EGR Valve. Tried cleaning last night but I think I need to replace and will do so. So I am wondering what to do next. I have seen posts about testing the TCM and getting Black Box systems from Cyprus to do so. Is there something ABS since the brake light issue is tied to something brake electrical. Could it be the silly brake pad wear sensor? I am not an electrical guy so I will have to learn how to test for drains and ground faults. Something is not right with the battery draining over time. Compressor always shuts off so its not compressor running and draining will ignition is off. I have all wiring trays open on both sides of the car for pictures and inspection. I could not find any cut wires or grounds not connected properly.