1G Custom radiator fan wiring

[bigbird94]

I have searched and collected some info on radiator fan wiring but still am not sure about how to wire my fans the way I want them.

I currently have two slim fans wired together into the D/S plug. My engine temps are just barely acceptable in traffic, I would like them to be lower. I think the problem is my slim fans.

I would like to switch to a stock fan on the P/S and leave the D/S slim fan. From what I have read the P/S does more to cool the radiator. I know how to hook up the D/S back into the stock plug so thats not an issue. I do not have AC, but need to be able to use my heat near constantly now in the winter so I do not want to wire into the ac fan harness.

My question is this, How do I wire the AC fan to be on constantly while still being able to have the heat on? Wire a relay off of a constant 12v power source at the fuse block to turn the fan on constantly?

 

[blizz99]

Why don't you wire both of them into the passenger side plug. You'd be able to use the fan controls in the cabin to turn them on if you want. That's how mine are wired.

 

[Colt4G63 also]

I put in a lower temp thermal switch to the PS fan so it comes on at 185* and shuts off at 165*. On the DS fan I wired it so it comes on when the A/C is running, and it also comes on anytime the idle switch has been activated for more than seven seconds.

Later I switched to a single fan setup with a wide shroud that covers the whole radiator, but the principal is the same as I now have a two speed fan.

In case someone wants to ask how to make a time delay relay:

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only difference was that I replaced 2N3053 with a 2N3055

 

[bigbird94]

Like I said in the first post I would like to have the PS side fan on with the engine and run under all conditions. Can I run a constant 12v of the battery and ground the other wire to chassis somewhere?

 

[WES_393]

Something like this?

1st Gen Cooling Fan Relay Bypass Mod

 

[Colt4G63 also]

You can run a piece of wire from one of the contacts of the A/C fan relay to ground, and it will do exactly what you want. If you ask nice, I'll look at the wiring schematic and tell you which one.

 

[bigbird94]

Something like this?

1st Gen Cooling Fan Relay Bypass Mod

Yes, exactly. This is perfect.

Thanks for posting, I don't know how I missed that, I use vfaq all the time..