Cabriolet rear screen blower

[M3KUK]

Hi trying to get this working on my K reg cabriolet. I have just bought a spare motor and connected it up to a 12v power supply. The motor works fine but the heating element won’t get hot. I measured it’s resistance and it’s 800 ohms. This seems a bit high? Anyone know what the correct value should be?

[paultv]

well its fed by fuse 8 which is 30 amps - so maximum dissipation could be 360 watts - this would result in a resistance for the heating coil of 0.4 ohms.

In reality I expect the heater in the blower pulls no more than 10 amps - resulting in about 1.2 ohms for the coils...

in any event the 800 ohms you have would produce about 15 milliwatts of heat with 12volts going through it - enough to warm a flea - so I'd say its stuffed.

Paul

[HartgeH27]

I have a couple of spares if you are interested.

Iain

07810 650 395

[M3KUK]

eBay strikes again! Sold as a good working unit!

[Satan]

Even when working they struggle......

[M3KUK]

PM sent Iain.