The bearings in the blower motor (1996 Volvo 850) went. I replaced the motor (could barely rotate the cage) with a new motor. However, the fan still does not come on and the two lights still blink orange.
I've read somewhere about how a bad motor can draw too much power and burn out another electronic component (resistor, maybe?), but I can't find any info on what or where that component is. So, I'm at a loss as to what I should check next.
Any advice?
Near the blower motor, by the back of the cockpit there should be a resisotor that has about 3-6 wires going to it that is mounted in the air box, they mount it in here so that air flowing through the system cools the resistor making it last longer, if this did not help i will search my manual for a more precise location.
C'mon man what, the resistors actually are NOT in the switch. If you check the service manual it states that the blowor resistor is on the blowor motor housing. The switch simply designates which resistor coil gets power. If the system only works on the resisted levels then the relay you guys have been refering to is most probably correct. If not then its something in the internal workings of the ac controls. the resistor being bad would allow the system to work on other levels.
And FYI putting an in line fuse inplace of a relay is NOT a recomended cure. A relay is a device that uses low voltage to operate a high voltage curcuit. a fuse simply prevents excess loads, I would not trust davesmith 37's advice.
if you have power at the blower motor check for grounds, if you have those then its a bad motor, sometimes we get N.E.W (never ever worked) parts.
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C'mon man , the resistors are in the switch, you have a relay im sure, check your wiring diagram
check for the power wire going from your relay to blower motor, this is what can burn up, i put a in line fuse on mine :)
I have just had the same problem. Blower motor crapped out, switched it, out of luck. Sounds like you're all saying resistor. Is that one of those blue or black boxes when the glove box is pulled out?
May have blown the fuse for the fan, check that
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Specifically, what is the process for checking the relay? I'm getting current from the wires connecting to the fan motor (but the fan isn't turning; and it's brand new, so I gotta think it's something with the relay.
Is there a way to test the relay? I'm getting power from the motor connector but nothings turning. The two orange lights on the switch housing still blink.
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