Test both relay sockets with a voltmeter… pin 30. Is there 12 volts at either? Is the 40 amp fuse for the fans Ok?
Check the black wire from the fans for a proper ground. Test ohms from the wire to a bare metal spot on the engine or alternator.
Post back with your results.
I will try and report back asap. On a different note do you know which fuse is the wiper fuse? I may have blown it from jumping the wiper relay yesterday. I did this to see if the wipers would turn on to see if the paperclip method was actually effective for jumping
No I thought this because the issue seems intermittent. For example the thermostat could close when idling in the driveway and then stick and not open again.
If this is like other vehicles that I know about, then the fan control temperature sensor is on the cold side of the radiator on the bottom, and it has nothing to do with the other engine temperature sensors for the temperature gauge or ECU.
When testing with paper clip, will connecting the +12V switched side to either of the relay coil connections damage anything? Will connecting +12V to the computer control connection damage it? Will connecting +12V to the grounded connection on the coil side, or if it’s wired the other way, will connecting ground on the switched side to +12V on the coil side, blow a fuse for the control module?
Your owners manual has a fuse diagram in it that tells you this.
If you don’t have one, download one from Ford for free.
Finally fixed it. I was looking at an incorrect key online for the fuses so i was pulling the wrong one. I looked at the right fuse for the fan relay and sure enough that one was blown. I replaced it and all is well. My question is: why did the fuse blow and can this point to a more serious issue or is it normal for fuses to blow without any serious underlying cause
Hard to say. Fuses can fail for no apparent reason, but that’s unusual. Usual cause for a fan circuit fuse to blow is a short circuit in the wiring or fan motor windings or the fan motor stalled b/c something is preventing the blade from turning. An electric motor generates electrical power when it is spinning, and this power lowers the amount of input electrical power required. If it doesn’t spin, it doesn’t generate any power, and that increases the amount of input power, sometimes blowing the fuse.
Suggest to be optimistic, old fan motor windings were shorting, but now you have a new fan motor, so fuse probably won’t blow.
In future if electrical motor doesn’t spin, most auto-elec specialists would start by probing the input voltage to the fan motor itself. Motor simply will not spin if not powered up. That’s often the quickest method to get to the bottom of it.
Success. I suspect the old motor was wearing out and drawing too much current. I think I would
Also just replace those two relays for a few dollars since they also may have been over loaded. Then if it happens again all you have to do is check the wires itself.