13-10-2015, 09:26 AM
(12-10-2015, 06:59 PM)Ruan Wrote:(12-10-2015, 04:12 PM)powerandtorque Wrote: I would have thought that if the fans work with the sensor unplugged then the earth side of things should be good enough for the fans to work, but worth checking and ruling out first.
Fans aren't earthed through the engine block though, that's off body electrics. Seen exactly this before where there was a dodgy earth, only other things that would be affected are obviously spark - although it's not a high load thing, very small current, but the main thing is the starter.
Fair enough if you've seen similar before.
My way of looking at it is that if the engine earth is good enough for the starter to crank over strongly (ie passing a significant amount of current) and the engine runs cleanly (so the sensor return should logically be relatively "clean") then it should be more than good enough for anything else.
If there's any doubt of course, a jump lead from the battery negative to the engine block should rule it out.
1990 Peugeot 205 GTi 1.9 // 1991 Peugeot 205 GTi 1.9 16v // 1992 Peugeot 205 GTi 1.9 // 1999 Peugeot 306 HDi Estate