Bench Test Fan Delay Relay

[TurboRegal84]

Is there a way to bench test the fan delay relays?

 

[garyk1970]

Is there a way to bench test the fan delay relays?

believe it or not i just shake them ....if they sound like a baby rattle toss it......
if no sound,you can take it apart (with 4 small flat head screw drivers) and inspect the big contacts on the relay,clean if nessary....and check for corrosion,etc on the other side of the board....

you can test on car;

unplug the three way plug on ac line under alt. ground the green/yellow wire (with the cars ign on engine off),turn engine off (leave wire grounded) the fan should stay running (approx 10 min)

 

[salvageV6]

If it's holding down your magazine collection under your socks in your dresser, it's working just fine.

But seriously you need the following bench connections:

Pin A C1 the ground trigger that activates the unit for delay, wire you can hook to battery ground by hand or via a switch.

Pin B C1 Output to cooling fan, use a good high current load resistor 5-10A or a headlight low beam bulb would probably work okay or a car fan.

Pin C C1 +12 hot at all times from the fusible link, it's the relays power that runs the load, thick wire to your test battery.



Pin A C2 +12 switched by IGN hot in run bulb test or start. A switch to your power supply should work.

Pin B C2 +12 at all times from the power brake fuse, test battery connection also via a separate wire.

Pin C C2 Ground of test battery.

Easier to check on the car, but we already know it's gonna fail if it tests good anyways