protoncoder

Car does not have air conditioning and the fan is working. Just tested it. It spins like a madman.

Temperature gauge never move above 90C.

Radiator fan never starts no matter how long I drive, no matter the speed or the hot weather. I uninstalled it but I don't know which pin is positive and which negative. I have jumper cables ready. I was surprised to see that the fan has only two pins because the female connector from the car has 3 metal sockets. Please help me understand which pin should be connected to negative terminal of car battery and which to positive. You can check the pictures of the fan here: https://postimg.cc/gallery/5vd1wvB

Neighbour told me about charging the battery after seeing me struggle to start the car every morning. I bought this one: https://www.hbm-machines.com/nl/p/hbm-druppellader-6-12-volt-3a-van-26-tot-90ah I left the charger for 48 hours but it never finished the cycle (froze at 75%) and the negative clamp melted a bit. Nothing changed, still can't start the car as normal and there is backfiring from exhaust when finally does for maybe 3-5 seconds. Thank you so much for this link, I downloaded the manual and will read it tomorrow. Thank you so much!

Standard Lead Acid.

Current battery is 65Ah 570A (242x175x190). It's smaller than battery tray box which can hold up to 278x175x190. Battery was almost dead when I bought the car but it's my first car so I didn't notice back then. I didn't even notice that the battery is smaller than the tray box. So I guess they guy just dropped some cheap old battery there so he could sell the car. But by the size of the tray box I think maybe I should buy bigger battery but don't know which one. All batteries with form factor 278x175x190 fill fit but they are with different specs like 70-72-74-77Ah and I know that not always bigger is better. Later I learned that with the car I should receive manual but he gave me nothing. I tried to contact him but with no success so far.

Should there be a problem with such battery? Is the capacity too much? Would be the alternator able to fully charge it when I take short trips around the town?

Thank you SuperbTMW! You deserve thanks too, because you pointed me to look again at his post.

Thanks, I understand now. It's just a sensor for fuel level. Injection pump does it all.

6Q0 919 183 A is the part number of that "pump". After google search I'm now not sure if it is a pump or just a fuel level sensor. Only two connections on the plug are really suspicious too.

I didn't know that. Will try this method and will write back. Thank you for this advice. Both of you

Thank you very much!

I did not grounded the multimeter to pump. The plug which provide electricity to pump has two sockets. I put one lead of one socket and other lead in the other socket. Two terminals was in the same plug just different sockets.

Oh, ok, I'll ground the black lead of multimeter to metal chasis of the car and red one in the plug, right? I just inserted two leads of multimeter in the two sockets of the plug.

First car so I don't know if it's normal these holes to be unplugged but I found wet spots under my rubber mats. First I thought the water is leaking from doors, roof etc. but I was inside the car with doors closed and friend of mine was pouring water over the car with a hose, a powerfull one and no leak. So I removed the carpet to see what's going on underneath and found this holes. You can see the grass through them... they are unplugged, I don't know if this is normal because it's my first car. I've asked my friend to check his car but he refused to "salvage" his car. There is some rubber ring leftover so my wild guess is... maybe it was rubber plug? Do they sell rubber plugs for these holes, or I should leave them open?