electical testing question

[gray84]

can anyone tell me how to test a heater control knob in my car? its a focus and its the heater speed control i need to test? ive got a multi meter.

ALSO a random question but how free/stiff should the heater motor/fan be to turn by hand? should it have a small amount of resistance on it or keep spinning freely after ive span it?

thanks for any help
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Road bike - 2002 YAMAHA R6(SOLD) 2008 YAMAHA R1(SOLD) 2007 APRILIA SXV 550(SOLD) 2007 SUZUKI GSXR 600
Dirt bike - 1989 HONDA CR80sw(SOLD) 1996 YAMAHA YZ125(SOLD) 2006 yamaha yz250(SOLD)

[Vincent]

I suppose you want to test the resistance in ohms at the heater end............but............why not try a car mechanics forum.?..........

[gray84]

BECAUSE! im not a member of a car mechanics forum!

so thought there MIGHT be a helpful person on here
____________________
Road bike - 2002 YAMAHA R6(SOLD) 2008 YAMAHA R1(SOLD) 2007 APRILIA SXV 550(SOLD) 2007 SUZUKI GSXR 600
Dirt bike - 1989 HONDA CR80sw(SOLD) 1996 YAMAHA YZ125(SOLD) 2006 yamaha yz250(SOLD)

[Coxyzxr]

[TQ]

I don't think the focus uses the same heater control valve as the fiesta/ka/puma but if it does then it's a known common point of failure.

I only say this as I assume the only reason you'd ask such a question is if your heaters are playing up.

I had to replace the heater control valve on my fiesta last week. Fifteen quid off eBay and half an hour to fit it. Might be worth checking yours isn't suffering the same fault as mine.
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First Bike :Gilera DNA 50 | Second: Imported 1989 NSR125
Third: 1998 Yamaha XJ600N | Currently: 1999 Yamaha FZS600

[gray84]

thanks....

i just bought a trade in car from a dealership that i work for. got it for my step dad to take his dog out save getting his car all shitty.
3 main problems it could be-

-heater motor-it does feel stiff and could be the bearings they say.so just wanted to know if the fan itself should have resistance as it feels a tad stiff.

-resistor- ive changed this and still doesnt work.ive been told these blow if the bearings on the fan seize up as it gets too much power/heat going through

-switch-need to know how to use a multi tester on it.ive now worked out the switch is ok. if i turn AC on and then turn the heater switch from 0 to 1 you can hear the AC power up so i know the swich is doing its job.

im off outside now to rip the motor out.
oh and fit a tow bar to the van for the trailer and crossers

thanks for the help
____________________
Road bike - 2002 YAMAHA R6(SOLD) 2008 YAMAHA R1(SOLD) 2007 APRILIA SXV 550(SOLD) 2007 SUZUKI GSXR 600
Dirt bike - 1989 HONDA CR80sw(SOLD) 1996 YAMAHA YZ125(SOLD) 2006 yamaha yz250(SOLD)