GoNz0

Safe to say the fans dead. Sent from my SM-G920F using Tapatalk

If the MM can detect PWM yes, otherwise you can expect some funny readings, it all depends how fast it can detect changes. I would be more concerned with tracing the PWM wire and testing continuity as I had one with a hidden break near the plug that didn't' show itself until I put another fan in and it still didn't work.

PWM isn't voltage drop it's voltage pulse.

You could, the PWM may not show properly on a cheap MM.

Yep

Yes m8, I have used the poundshop versions that are identical ingredients. If you don't have new turbo bolts it may be an idea to get some (You can use it for sticky turbo vanes as well) FYI the last N47 I fixed by cleaning the linkage and permatex nickel grease is still working perfectly 6 months on

If the linkage is sticky use a foaming oven cleaner to get it back to as new condition before greasing.

Never got a reply to it m8. The only thing with greasing it is the temps it has to cope with, copper grease isn't quite enough. I use the same stuff I put on turbo bolts. Permatex 77134

Always worth checking for water in the boot?

Yeah, that or brake cleaner as neither leave a residue. N47 are prone to the turbo linkage sticking, it is a known issue as BMW sell the linkage but it's unlisted funnily enough! Take the actuator off (don't lose the circlips) and check the linkage moves free?

Electrical contact cleaner leaves a lubricating film so you have probably done the maf more harm than good.

Constant power and earth, the small wires the pwm signal. You would need a pwm signal generator to test it. Test wise I check for continuity on the wires. Sent from my SM-G920F using Tapatalk

Default code CCC with NCS expert?

If you have the ECU and cas you only need to load the light module and fa write to the cas followed by default coding. Sent from my SM-G920F using Tapatalk

Just to add, the sliders are dry on our cars, they should move without lubricant. Also when fitting the slider bush you shouldn't use oil as it won't dry like ate fitting paste, if it stays wet with oil it will move and pull in dirt again, this could cause it to seize again. Sent from my SM-G920F using Tapatalk