Thread: Air Con Blower fan

Mine ended up being a bad solder in the fuse box under steering wheel as well. I was fortunate enough to have a couple of guys at work with nothing else to do, that ended up finding the problem.
Mine hasn't been immersed in water though.

Greg

Thanks Greg,
mine has 11.5-12 volts at the connector block next to the fan so I don't think it can be at the fuse box. I will be checking out the relay on the earth path on the week end so I will see if that is my problem.

Steve

I believe the voltage output to the fan motor varies depending on the fan speed setting. Try a different speed and note if the voltage changes, if it does the system is working correctly.

My problem was the connector plug at the fan had issues - worked if I wriggled it but only till the first bump in the road.

I simply cut the plug out and put in spade connectors. Has worked fine ever since.

Cheers

The different speeds are managed by a power tranzistor which varies the resistance on the earth path, there's constant 12V feed to the blower when operation is required

Both my front and rear fans have stopped I had a blown 25a fuse in slot 32 under the dash apparently the accessory socket. I have 9.2v feed to the fan and can hear the relays on and off when I turn the ac on and off. Any tips?

No power to brown wire on the relay for the fan. Do you recon it's the fuse board?

Originally Posted by stevep

Thanks Greg,
mine has 11.5-12 volts at the connector block next to the fan so I don't think it can be at the fuse box. I will be checking out the relay on the earth path on the week end so I will see if that is my problem.

Steve

I'd still check for a possible dry joint on the fuse box main board, as per the picture above. I've had exactly this fault in the past, and you can still get 12V at the fan, when it isn't running, and as soon as it tries to draw current, the dodgy solder point provides enough resistance to drop chew up the voltage.

It's a pain in the backside to get the fuse box out and apart (I know, I've done it twice because I didn't fix it properly the first time), but I reckon this would be a real possibility. I've got a picture on the gallery with the specific joint identified, but the gallery seems to be down at the moment, so I can't upload the picture, but I've done so in the past, so you might find it on an earlier post.

Found one that needs fixing. Not sure if it will fix it but will mend it while it's out. Bit of white stuff around, is that corrosion or something else? ImageUploadedByTapatalk1420268635.468243.jpg