GVR-4 Wiring SPAL/Aftermarket Radiator Fan to Galant VR-4

[S_39]

Hey all,

I'll preface this by saying that I am by no means a wiring expert but I just wanted to go ahead and share my journey fixing an overheating problem at idle with my GVR4.

I traced the problem down to what I thought was a faulty/burnt out SPAL fan that was installed on my Galant years before I bought it using a basic power probe. I found that the wires had been bound together with just simple connectors instead of being soldered together. When I lightly tugged on the connections they instantly fell apart, having rusted completely. After disassembling and cleaning all of the wires of all the sticky residue left behind by the melted-on electrical tape, I had the thought to re-test the fan. Sure enough, the fan wasn't burnt out after all.

Below are some pictures explaining the wiring:

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One of the previous owners had completely removed the thermosensor which usually would plug into the bottom of the radiator (the car does not have the stock radiator anymore).

I believe that the wires that currently go "to nothing" are the two wires that connect to a resistor seen in this diagram:

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Just to make sure that everything was working at least serviceably for now, I plugged the connector into the harness and it comes on when the ignition is switched to ON. Later on I plan on reimplementing an in-line thermosensor and rewiring it as the current radiator installed on the car seems to not have any open ports for one.
I plan on doing this because waiting for the car to warm up during the winter with a SPAL fan blowing at full blast will likely become tedious.

I have since properly protected the wiring with Tesa's High Heat harness tape and braided loom to prevent future damage to any of the wiring, and I no longer experience any overheating problems at idle.

Hopefully this post can help other people with similar issues.

 

[Conrutz]

hey , so i kind of have the same setup but mine does not turn on. do you have the termostat wires looped and the resisor wires looped as well?

 

[S_39]

hey , so i kind of have the same setup but mine does not turn on. do you have the termostat wires looped and the resisor wires looped as well?

From what I can gather, I know for a fact that the thermostat wires are in fact looped, but the resistor wires I'm not sure if they're looped or just open circuit. You can always try in both configurations but be sure to practice good safety when dealing with exposed electronics like this.