Where does the high speed fan relay mount with a non-AC HVAC box?
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Joined: Mar 2001
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Where does the high speed fan relay mount with a non-AC HVAC box?
Thinking of pulling my AC box and installing a non-AC box for more room to work on engine.
1. Where does the fan high-speed relay get mounted with non-AC boxes? I don't see a provision on the box.
2. I have two boxes and they have different fan speed resistors. One is from a '85 Camaro and has 3 pins with 2 resistors. The other is from a ??? and has 4 pins with 3 resistors. Why the difference? I am guessing I want the 4 pin model to work with my 4-position fan switch in the HVAC head unit in dash.
1. Where does the fan high-speed relay get mounted with non-AC boxes? I don't see a provision on the box.
2. I have two boxes and they have different fan speed resistors. One is from a '85 Camaro and has 3 pins with 2 resistors. The other is from a ??? and has 4 pins with 3 resistors. Why the difference? I am guessing I want the 4 pin model to work with my 4-position fan switch in the HVAC head unit in dash.
Last edited by QwkTrip; Mar 30, 2019 at 06:21 PM.
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Engine: LG4
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Re: Where does the high speed fan relay mount with a non-AC HVAC box?
I've not seen a high fan relay in non-AC applications in this era. The non-AC fan is a lower amperage fan motor.
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Joined: Feb 2019
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From: SW Missouri
Car: 1989 Trans Am
Engine: sp357
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Re: Where does the high speed fan relay mount with a non-AC HVAC box?
Thinking of pulling my AC box and installing a non-AC box for more room to work on engine.
1. Where does the fan high-speed relay get mounted with non-AC boxes? I don't see a provision on the box.
2. I have two boxes and they have different fan speed resistors. One is from a '85 Camaro and has 3 pins with 2 resistors. The other is from a ??? and has 4 pins with 3 resistors. Why the difference? I am guessing I want the 4 pin model to work with my 4-position fan switch in the HVAC head unit in dash.
1. Where does the fan high-speed relay get mounted with non-AC boxes? I don't see a provision on the box.
2. I have two boxes and they have different fan speed resistors. One is from a '85 Camaro and has 3 pins with 2 resistors. The other is from a ??? and has 4 pins with 3 resistors. Why the difference? I am guessing I want the 4 pin model to work with my 4-position fan switch in the HVAC head unit in dash.
The 4 pin resistor allows the extra fan speed for the A/C equipped cars. If you want to retain all 4 speeds you will need to reuse it.
Thread Starter
Joined: Mar 2001
Posts: 10,405
Likes: 2,081
Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Where does the high speed fan relay mount with a non-AC HVAC box?
I swapped the shorter cage over to my AC motor and everything seems to fit right.
Where are you guys buying the blower motor hose? That's the one part I'm missing.
Where are you guys buying the blower motor hose? That's the one part I'm missing.
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Joined: Jan 2006
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From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
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Knows About Hose
Originally Posted by QwkTrip
Where are you guys buying the blower motor hose
This is not a misprint, HomeDepot.
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Stevolwevol
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