Low temp fan switch questions
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Joined: Dec 2001
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From: Royal Oak MI
Low temp fan switch questions
I am considering putting in a 180 degree thermostat and a low temp fan switch. I have an 89 convertible without the auxiliary fan.
Do I need the harness? Since I don't have the aux fan, I don't think I do, but wanted to make sure.
Where does it go? I assume on the block somewhere, but don't see where.
Is it as simple as changing the thermostant & switch? Does it 'trick' the prom somehow to turn the fan on at a lower temp?
Thanks for any help you can give me.
Do I need the harness? Since I don't have the aux fan, I don't think I do, but wanted to make sure.
Where does it go? I assume on the block somewhere, but don't see where.
Is it as simple as changing the thermostant & switch? Does it 'trick' the prom somehow to turn the fan on at a lower temp?
Thanks for any help you can give me.
Drifting
Joined: Mar 1999
Posts: 1,931
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From: Norcross GA
Re: Low temp fan switch questions (Black89)
Do you have a fan in front of your radiator? This is the one that is controlled by the switch. The rear fan is totally controlled by the PROM. A quick reprogram will fix that for you. The switch goes into the side of the head, between a couple of the header tubes. It is a single (green wire) connection.
Team Owner
Joined: Jan 2003
Posts: 20,322
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From: Summerland B.C. Canada
Re: Low temp fan switch questions (Black89)
That temp switch is for aux fan, which you said you don't have. But you can still wire into main fan relay with a single wire.
The switch goes into drivers side of block between 1 and 3 cyl.
[Modified by AGENT 86, 6:27 AM 9/30/2003]
The switch goes into drivers side of block between 1 and 3 cyl.
[Modified by AGENT 86, 6:27 AM 9/30/2003]
Team Owner
Joined: Sep 2002
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From: OBAMA IS HITLER
Re: Low temp fan switch questions (AGENT 86)
That temp switch is for aux fan, which you said you don't have. But you can still wire into main fan relay with a single wire. The switch goes into drivers side of block between 1 and 3 cyl.
Team Owner
Joined: Dec 2000
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From: SE NY
Cruise-In II Veteran
Re: Low temp fan switch questions (bradvette)
You realy don't need a wiring harness to wire an aux fan switch to control the main fan.
You can buy the connector for the new switch (if one doesn't come with the switch), get a length of grn wire and route the wire over the the large harness running along the left inner fender well. Then bring that new grn wire out near the main fan relay (on the rear of the left inner fender well) and splice it into the grn/wht wire going to that relay. You can bet splincing connectors at Radio Shack to do this job.
You can buy the connector for the new switch (if one doesn't come with the switch), get a length of grn wire and route the wire over the the large harness running along the left inner fender well. Then bring that new grn wire out near the main fan relay (on the rear of the left inner fender well) and splice it into the grn/wht wire going to that relay. You can bet splincing connectors at Radio Shack to do this job.
