electric cooling fan question
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electric cooling fan question
I know it's not a ford truck,(but at least it's a ford). I have a 1999 escort with 110,000 miles. To night the wife got home and the cooling fan wouldn't shut off. I pulled the connector off to stop the fan.
Then I pulled the 40 amp fuse and hooked a test light to the prongs in the fuse block. One side is hot,(key off) the other side is grounded. I don't mean it is not hot, but goes to ground.
So does this mean I have a short somewhere? or, does this mean the sending unit is sending a signal to this prong? and that it is normal and maybe the sending unit is bad?
Also the connector going to the fan has 3 wires. One shows hot, one shows ground and one shows neither hot or ground.
Need more info?
TIA
thefonz
Then I pulled the 40 amp fuse and hooked a test light to the prongs in the fuse block. One side is hot,(key off) the other side is grounded. I don't mean it is not hot, but goes to ground.
So does this mean I have a short somewhere? or, does this mean the sending unit is sending a signal to this prong? and that it is normal and maybe the sending unit is bad?
Also the connector going to the fan has 3 wires. One shows hot, one shows ground and one shows neither hot or ground.
Need more info?
TIA
thefonz
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Joined: Apr 2005
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Update:
If I unplug the sending unit for the fan, it still runs, so I'm guessing this is not it. Is that correct?
When I Unplug the harness from the fan, I no longer have the blade in the fuse block going to ground. So would this mean the motor itself is the problem? I would think if the wiring harness was the problem it would still be going to ground.
BTW, there is 3 wires that connect to the fan motor. Black,Yellow and green with yellow stripe.
No matter what the yellow is never hot or ground, so I'm guessing this would be picked up through the fan sending unit.
Any time fuse is in, (key on or off) green w/ yellow stripe is hot and black only is ground
Any time fuse is out,(key on or off) nothing hot, Black only is ground.
Any ideas would be great!
If I unplug the sending unit for the fan, it still runs, so I'm guessing this is not it. Is that correct?
When I Unplug the harness from the fan, I no longer have the blade in the fuse block going to ground. So would this mean the motor itself is the problem? I would think if the wiring harness was the problem it would still be going to ground.
BTW, there is 3 wires that connect to the fan motor. Black,Yellow and green with yellow stripe.
No matter what the yellow is never hot or ground, so I'm guessing this would be picked up through the fan sending unit.
Any time fuse is in, (key on or off) green w/ yellow stripe is hot and black only is ground
Any time fuse is out,(key on or off) nothing hot, Black only is ground.
Any ideas would be great!
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