kdtomczak

Got my radiator changed and now the mechanic tells me that the fan doesn't work...but i'm positive it did before...He tells me it is an electrical wiring problem. Would this be tough to fix myself?

'86 Vette

oldalaskaman

ground your aldl, turn the ignition key to on but dont start your engine, if the fan runs, its good

1Asterisk

Did your old radiator leak? The fan could have been the problem all along. The procedure is about 1 step further than getting the radiator out. At least that's how it looked when I changed my radiator a little while ago.

1993C4LT1

What is the 'aldl'?

vetteoz

Did he get the engine hot enough ( 230F ) to turn the fan on?

oldalaskaman

theres a plug under the right side drivers kick panel , it usually has a plactic cover that just slides off. paperclip bent in a 'u' shape, inserted in the top right two sockets, turn the ign.sw. on but dont start the engine. fan should turn on. if it does its good, if it doesnt , start chasing wires.

Cliff Harris

The ALDL (Assembly Line Diagnostic Link) connector is located just above your right knee when you're sitting in the driver's seat. It was originally called an ALCL (Assembly Line Communications Link) in the shop manual, but has changed to ALDL over the years.

There may or may not be a cover over the connector that comes off by pulling it toward you. Connect terminals A & B to go into diagnostic mode and turn on the ignition without starting the car. The fan should come on. Other things also happen, but the fan is what you're interested in here.

My guess is that the fan is unplugged. There is a connector on the bottom of the fan motor.

flannel_man

or just turn key to on, pull the wire from the right side temp sensor and ground it, just had to test mine 2 hours ago, connection on the plug was bad

65Z01

Or open the small connector in the A/C line, start the engine and the fan will run.

kdtomczak

Where is the fan motor actually located? Am i goin to have to get under the car?

oldalaskaman

raise hood, look at radiator, there's a fan bolted to it, look down in between the fan and the engine at the fan, you will see the fan motor ,'a round bout 6" in diameter black thing bolted to the fan. comming from that you should see a plug,'a piece of plasric bout 11/2" , down by the frame of your car, if that doesnt have a plug in it , there's one in that area that needs to be there, and it will only plug in one way.

kdtomczak

The fan is in between the radiator and the serpentine belt system. Is there another one?

kdtomczak

any corvette specialist mechanics in the Columbia, SC area?

aminnich

Turn on the AC and see if the fan runs.

1993C4LT1

When I turn my a/c on, my fans work. Why does it do that?

kdtomczak

i was looking around the fan and I found a piece of one of my former serpentine belts that had gone bad. It was wraped around the center. Could this have done something to the motor? I got the piece out fairly easily.

oldalaskaman

so.......the current mechanic, he pulled the fan, he pulled the radiator, changed it, put the fan back on and didnt make sure it worked, and left old serpintine belt around the fan motor....right.

Cliff Harris

The fan is controlled by the ECM, based on the coolant temperature that it measures with the CTS (Coolant Temperature Sensor) on the front of the intake manifold (under the throttle body).

The serpentine belt might have broken a wire going to the fan motor. Check out the connector and wires on the bottom of the fan motor.

oldalaskaman

cause that the way they're s'posed to

kdtomczak

The fan motor is plugged in...and i did aldl ground procedure and nothing happened with the fan.