2008 Ford Fusion



October, 31, 2012 AT 3:58 PM

Does my a/c have an open circut or a short in the system?
about 8 months ago my ac went out, it wasnt blowing any out from any vents. I replaced the blower motor resistor and that brought the ac back on for about 2 months, then it did the same thing and went out again. I then replaced my blower motor this fixed the problem for about 6 monts, about 2 weeks ago the problem reaccured. I tested the blower motor by directly wiring the motor to my battery and it works fine. I took my multimeter and checked the voltage coming fromthe resistor and I have voltage and the connector for the motor coming from the resistor also has voltage. I have check the compressor and it too does work. I have been working on cars for years now and im lost, I have checked fuses and relays. Ford even let me swap resistors just to make sure and its still dead. I believe there is a short in the system, what do yall think?

2 Answers


Brien p

October, 31, 2012 AT 4:17 PM

Pull radio fuse they some have memoryTake positive battery cable off and connect one end to cable and one end to battery test light in between if light is present short to ground start pulling fuses light goes off theres your short to track down or unplug a few of your components to see if light goes off in the A.C>



October, 31, 2012 AT 5:01 PM

Check the ground going to the blower, sounds like the circuit isn't being completed. The ground is in center of dash, it also grounds the control unit. Also check the ground on lh side of dash as that also grounds the unit. The lh one is blk with a violet stripe center is black.

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