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Burnt radiator fan resistor pin- need help please!
2010 Mustang V6
Hey guys, I’m new here ☺️.
I have been having overheating issues lately. After poking around a little, I found the radiator fan resistor connection had a burned/melted pin (see pic)
Is this a normal problem? If I swap the resistor, will that fix the issue? Or will the new one burn out too?
also, I can’t seem to find this part anywhere on the
internet to purchase.
should I be checking any other parts? Thank so much for any help
i don't know how "normal" or common it is, but the same thing happened on my 2013. All I needed was to cut back the wiring to where there was good wiring and splice in a new connector.
Replace the connector on the car side and replace the part that it plugs into. If it's a resistive type part, most likely the resistor is burning out and causing excess current to flow. This burns out the connector from from the heat created by the unchecked current running through it.
I agree that's the right repair strategy, but doesn't address why this is happening on so many Mustang owner's vehicles. Seems like a substandard design if changing the components does not guarantee it won't happen again. A heavier duty connector should be able to withstand variances in current draw as the connection ages. The wiring harness should be designed to handle any current draw that is within the fuse limit. I don't believe a 40 Amp fuse blows at 41 Amps, so if the fuse takes 55 Amps to blow, the wiring harness should be designed to handle 55 Amps. The fuse should be the fail safe in the system, not the connector. Seems the circuit and harness was designed to nominal operating conditions rather than operating limits.
With so many people having failed radiator fan connectors, why no TSB issued?
I don't see this issue on the forums for Corvette, Challenger, etc... seems to be a Mustang design issue that even plagues 2005+ models. There's a posting on another forum where someone had this exact same issue on a 2017. How do you have this issue showing up on over 10 years worth of model years, and not trigger some sort of investigation or TSB?
Originally Posted by Derf00
Replace the connector on the car side and replace the part that it plugs into. If it's a resistive type part, most likely the resistor is burning out and causing excess current to flow. This burns out the connector from from the heat created by the unchecked current running through it.
IMHO, I think your fan motor is going bad and thus causing a higher than normal amp draw to run it and ending up melting the connector and/or high and low relay connectors as well. a new fan should solve the issue.
03-03-2019, 02:01 PM
Burnt radiator fan resistor pin- need help please!
