Sorry I’m bad at electrical but I am trying to learn

Hey I'm finishing up an engine re&re I started 2 year ago on 2009 toyota matrix 1.8L manual. donor engine did not have iginiton filter/condenser.

pretty sure I have a vacuum leak (brake clean test didnt find anything though)

getting 0301, 0302, 0138, 0219a and 0607.

a little concerned because needing a new ecm might make this project not financially worthwhile

Hello! Was wondering if any of you guys have experienced something like this this is my 2006 Toyota Sequoia. I was driving to work this morning and all of a sudden the cruise control lights are flashing and then a couple miles later parking brake light side flashing ABS light flashing. VSC light started flashing. No check engine light though. I was wondering if you guys have diagnosed this other issue on anyone else’s car and if you could tell me some tips on how to fix it I have a trip in three days wanting to see if I can get this fixed quickly. On top of all that as well. The AC went out as soon as this happened as well, which is strange. Let me know if you guys have any tips so I can figure this out.
- the battery is brand new and showing 13 to 14 V and the alternator is in good nic

Turning a mini bus into a mobile home :)

Having trouble with the rear turn signals, neither have power (second pic). I tested fuses are good, every other wire in the harness has power just not the turn signals
Where do I start, do I just splice into the front turn signals?

I have a Volvo xc70 that I installed a hitch and wiring on some time ago. It was a wiring kit from e-trailer that has a control box where one live wire runs up to the positive batter terminal, and two connectors plug into each of the tail light connectors in the car. The wiring has been finicky from the start. The only way everything worked was when I would leave the back hatch unlatched. If the back hatch was completely shut, only the running lights would work. Since then, now only the running lights function no matter what.

I’ve tested the ground with a multimeter, which seems to be good. (Checked and confirmed continuity between the ground pin on the 4 pin connector and the ground screw that attaches the white wire from the control box to the unibody. Is that the correct way to test that?)

Using a multimeter on the 4 pin connector, there is 12 volts going to each of the three other pins all the time, no matter if blinkers, brakes, hazards, or headlights are on or off.

I’m fairly certain the issue is on the car side of things and not the trailer because the trailer works fine on other vehicles, and I have one of those 4 pin circuit testers, and the multimeter, which confirms what I stated above.

What am I missing here? The kit seems pretty plug and play, but surely I’m just missing something.

Thanks for the help!

I have a 2019 Lexus NX 300h. One of my key fobs is not working. I changed the battery. The red light blinks whenever I push any of the buttons but nothing actually works on the car. Can’t unlock, lock, open trunk, or use panic button. It was working fine before. This is the one my bf uses so doesn’t get used as often as mine (which works fine) but still was getting used regularly. What could be going on?