Hi gents. Help please. I'm trying to get a uncared for 749 back together again. After quite a lot of work it did start but the fan comes on when you turn the ingnition on which is quite bizarre. Any ideas please?
The temperature thermostat that kicks the fans in? Or if it is unloved, has a previous owner done a bodge job to have the fans on all the time?
i don't think that's the issue but the wiring was pretty horrible. Hope I've rectified most of those issues but a new / eBay / loom maybe required at a later date.
Try this. Locate the diagnostic connector on the side of the battery box. It is a 3 way Superseal connector and should have a plastic cap on it. The connector has 2 wires into it. Tap a wire into what would be the middle wire and run the wire to the -ve terminal of the battery. See if that stops the fan and EOBD.
Possible ECU fault caused by a polarity inversion. It breaks an earth in the ECU but the wire mod corrects this.
