PWM cooling fan(s) control using ECM - Lateral-g Forums

samckitt · #1 05-19-2015, 07:20 PM

I found a connector in the junk yard in a car that had next to nothing left of it. I glanced in the engine bay and found it there on the fan. It has 2 large terminals for power and one smaller for the signal wire. So I grabbed it. No idea what the car was.

**andrewb70** · #2 05-19-2015, 08:26 PM

Quote:

Originally Posted by samckitt

I found a connector in the junk yard in a car that had next to nothing left of it. I glanced in the engine bay and found it there on the fan. It has 2 large terminals for power and one smaller for the signal wire. So I grabbed it. No idea what the car was.

That looks different than the connector that came on the C6 fan, so I guess you just spliced it in?

Andrew

samckitt · #3 05-20-2015, 07:10 AM

You are right Andrew, I heard of issues with the stock Corvette connector overheating & melting. So when I saw this one that has bigger terminals, I grabbed it to use. I took the connector apart, & opened the crimp on the terminals, removed wire attached wire from fan harness, crimped & soldered.

**GregWeld** · #4 05-20-2015, 07:15 AM

Weather Pack connectors are good to 20 amps -- after that you switch to METRI-PAK 480 series connectors which will handle 42 amps. There are other "series" which will handle higher loads but 42 amps per fan is plenty of surplus as they'll pull about 30 amps or less.

**andrewb70** · #5 05-27-2015, 08:22 PM

Quote:

Originally Posted by GregWeld

Weather Pack connectors are good to 20 amps -- after that you switch to METRI-PAK 480 series connectors which will handle 42 amps. There are other "series" which will handle higher loads but 42 amps per fan is plenty of surplus as they'll pull about 30 amps or less.

Greg,

Excellent segway...I just picked up some 3 cavity Delphi GT480 connectors. They are rated at 42 amps, as you said.

I will run my power (+/-) and the PWM wires to the fan controller through this connector.

Andrew

erick_e · #6 05-30-2015, 03:57 PM

After finally experiencing the melted connector on my corvette, I decided to upgrade to a more reliable solution that won't derate with high under hood temperatures.

I ended up going with a Anderson Power connector rated at 75A.

If you are interested you can read my post at the link below.

http://www.corvetteforum.com/forums/...connector.html

**andrewb70** · #7 05-30-2015, 06:04 PM

I wonder why those factory connectors fail. Hard to imagine that it is simply current draw. The Corvette fan is said to be 400watts, so it should draw less than 35 amps. Heat? Moisture? Other causes of failure?

As I posted, I plan to use the Delphi GT480 series connector, which is rated at 42 amps. Where did you source the 3 cavity Anderson connectors and terminals?

Andrew