06 Passat 2.0L TDI BKP, climatronic air con, DSG
Some months ago, the temp gauge moved past 90deg mark, which has never happened. It was a hot day and air con was on, in slow moving traffic too. I almost pulled over, I turned off the aircon, but the traffic moved on and the temp started to go back to normal. Got home and had a look. The radiator fans were not running. Checked the 10A fuse and it was blown, so replaced it, started engine and switched on the air con, fuse blew again.
I researched it and thought the fans controller (on the back of one of the fans) had gone bad, so bought a replacement, but the fuse blew again! I left it over the winter. But now I’m trying to get it up and running in this hot weather. I checked the wiring between the fan connector and the harness and found there was a short between the power and earth cables, so by-passed the fan power cable and fuse and ran a separate cable with fuse, straight to the power distribution on the front of the engine fuse box. As soon as I connected the fuse, the fans came on full speed. I tested the control wire to the fans and cut it, the fans stopped!
I thought there must be another short in the cabling, so tried to trace the control wire, but the wiring harness is so tightly wrapped I only managed to trace it to near the headlight area, so I hazarded a guess it was close to the fans, were it can flex and possibly break, perhaps similar to the power wire. No luck. What happened now: The fans come on with the ignition off, but with engine on, the fans stop!
Has anyone got any idea on this, as I’m stuck, unless I run a separate control wire from the ecu connector to the fans control wire.
Some months ago, the temp gauge moved past 90deg mark, which has never happened. It was a hot day and air con was on, in slow moving traffic too. I almost pulled over, I turned off the aircon, but the traffic moved on and the temp started to go back to normal. Got home and had a look. The radiator fans were not running. Checked the 10A fuse and it was blown, so replaced it, started engine and switched on the air con, fuse blew again.
I researched it and thought the fans controller (on the back of one of the fans) had gone bad, so bought a replacement, but the fuse blew again! I left it over the winter. But now I’m trying to get it up and running in this hot weather. I checked the wiring between the fan connector and the harness and found there was a short between the power and earth cables, so by-passed the fan power cable and fuse and ran a separate cable with fuse, straight to the power distribution on the front of the engine fuse box. As soon as I connected the fuse, the fans came on full speed. I tested the control wire to the fans and cut it, the fans stopped!
I thought there must be another short in the cabling, so tried to trace the control wire, but the wiring harness is so tightly wrapped I only managed to trace it to near the headlight area, so I hazarded a guess it was close to the fans, were it can flex and possibly break, perhaps similar to the power wire. No luck. What happened now: The fans come on with the ignition off, but with engine on, the fans stop!
Has anyone got any idea on this, as I’m stuck, unless I run a separate control wire from the ecu connector to the fans control wire.
