new US member. i bought a 2012 Fiat 500.
basic info: 1.4 multiair engine, auto trans
sunroof, elec windows, elec mirrors.
everything on this car is electronic.

cool car, but i bought it as a flood salvage. all the interior electronics are messed up. cleaned everything best i could. major problems:
1) instrument cluster mostly nonfunctional (onlyLCD and warning messages)
LCD warning messages:
a) fuel cutoff - unavailable?...
b) airbag ..... see handbook...
c) check daytime running lights
2) no speaker output from radio
3) no functional passenger side directionals (US)
4) functional driver side directionals go off by themselves (US)
(can be shutoff by pressing hazards)
5) battery drain from an item at interior fuse box (top green connector at back of fuse box)
6) setoff airbag warning code. UGH im an idiot.:doh:
6a) guessing I triggered fuel cutoff switch
6b) took apart airbag ECU to clean it. all looks good but broke 2 screws
appears that ECU board has external ground? those 2 screws broke
7) electric power steering mother board appears fried in several spots
(disconnected for now)
8) when i reconnect battery i hear a short funny buzzing sound that
seems to be coming from wiper area?
(too quick to diagnose)
THINGS THAT ARE FUNCTIONAL
left turn signals, power windows, power mirrors, power sunroof, interior lights, headlights.
FUSEBOXES
All fuses have power except:
underhood: A 30 amp fuse. medium size. (#F85 from downloaded FIAT FORUM handbook)
underdash: 2 fuses (F12?,F13?) unsure cuz my fusebox looks different
could be F47,F48. either way, 2 fuses at end of fuse block

that's about it. car started, ran and drove fine before i took it apart.
so engine ECU, engine, trans, engine fusebox seem fine. auto trans is a sealed unit, not even a dipstick. put in new air filter, cleaned throttle body
engine ECU has smallest bit of corrosion on 2 pins, but no signs of water
getting into ECU. CHANGED ALL FUSES AND DOUBLE CHECKED, triple checked. fuel pump relay(T17) has no power. probably cuz i tripped the airbag ECU:doh:. relay T19 seems to have no power to one connector.

SOOOOO.... i'm lookin for an electrical god:worship:
i can follow electrical directions fairly well, just need help from someone who is intimately familiar with the electrical of a FIAT 500. just keep in mind that this is a left hand drive US model. dunno what might be different from UK models or year changes etc...

can send pics, more info etc... with electrical, just be as specific as possible. so if you made it this far....; Thanks for your help.:slayer:
JIJ

Hi JIJ, welcome to the forum

To me it sounds like water ingress in either the ECU, body computer, wiring loom or all of the above.

I'd suggested reposting this in the 500 (USA) section as not many folk look in Newbie Central for tech questions. My personal feeling would be to find another MultiAir salvage car and take the ECU, body comp, ignition barrel (+ keys) and wiring loom from it and swap it all over. A lot of work but certainly easier that chasing electrical ghosts.

Website will not allow me to post a URL unless i have 5 postings, so this is #2:bang:

electrical gods, hear my prayers.....:worship:
(posting #3:bang

more prayers to electrical gods tomorrow....:worship:
(post #4:bang