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Mooch60122
PostPosted: Mon Mar 28, 2011 10:45 am 
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Year and Trim: 1995 Pontiac Bonneville SSE
I'm trying to locate the cooling fan temperature control switch on my 1995 SSE. The temperature gauge reaches 220 sometimes then drops down to 200. It seems that the cooling fans are not coming on. I've changed the thermostat and the temperature control valve. I've also changed the 2 sensors located below the fuse box under the hood mounted on the firewall. I've also checked the 10 amp fuse inside the car located underneath the drivers side dashboard in the fuse panel. I was told that there is a cooling fan switch located on the motor that controls the fans. Can someone please help me in locating this switch. Thank you for any help.
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RJolly87
PostPosted: Mon Mar 28, 2011 11:03 am 
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Year and Trim: 1993 Buick Park Avenue
1994 Buick Regal Custom
220 is about the typical turn on point for the cooling fans. There is not an actual control switch in the sense that you are describing. The cooling fans are actually controlled by the computer. The computer reads the Coolant Temp sensor, and uses that information for calculating fuel mix, spark advance, etc. When the computer observes that the temp is high enough, it will then trigger the fan relays, low speed comes on at 215*, and high engages at 225*, or when the A/C compressor is engaged. If I am worried the fans are not working correctly, I usually let the car idle while setting still until either the fans come on, or the car reaches around 230*-240*. These engines will usually let you get away with 250*, but I don't like to ask it to.

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PossessedPower
PostPosted: Mon Mar 28, 2011 1:49 pm 
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Location: calgary,alberta,canada
Year and Trim: 1993 ssei,2000 chev venture LE,1990 Dodge d-150
Mooch60122 wrote:
I'm trying to locate the cooling fan temperature control switch on my 1995 SSE. The temperature gauge reaches 220 sometimes then drops down to 200. It seems that the cooling fans are not coming on. I've changed the thermostat and the temperature control valve. I've also changed the 2 sensors located below the fuse box under the hood mounted on the firewall. I've also checked the 10 amp fuse inside the car located underneath the drivers side dashboard in the fuse panel. I was told that there is a cooling fan switch located on the motor that controls the fans. Can someone please help me in locating this switch. Thank you for any help.


I thought the same as you it's a little too hot for me, Once you find out the the cooling fans work,You could do the cooling fan override switch.

:poke:

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Mooch60122
PostPosted: Mon Mar 28, 2011 10:18 pm 
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Year and Trim: 1995 Pontiac Bonneville SSE
Also while working on this problem if I remove the plug on the temperature control device located underneath the thermostat both cooling fans come on. Any help?
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willwren
PostPosted: Tue Mar 29, 2011 12:20 pm 
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95 SLE (SC)
97 Buick LeSabre
That's normal. That is a coolant temperature sensor, and when you disconnect it, the PCM commands the fans on.

There is nothing wrong with your car. Everything you describe in this topic is working exactly as designed. You've been replacing parts for nothing. Do your fans come on when the AC is turned on?

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Mooch60122
PostPosted: Wed Mar 30, 2011 9:58 am 
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Year and Trim: 1995 Pontiac Bonneville SSE
No the fans do not come on.
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PossessedPower
PostPosted: Mon Apr 04, 2011 10:56 am 
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Do you have the ECC?

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willwren
PostPosted: Mon Apr 04, 2011 9:39 pm 
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(Electronic Climate Control is ECC with the digital display) or do you have knobs?

Turn your AC on. Do the fans come on?

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93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers
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wallypop1010
PostPosted: Wed May 25, 2011 9:01 am 
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Year and Trim: 1996 lasabre
Mooch60122 wrote:
I'm trying to locate the cooling fan temperature control switch on my 1995 SSE. The temperature gauge reaches 220 sometimes then drops down to 200. It seems that the cooling fans are not coming on. I've changed the thermostat and the temperature control valve. I've also changed the 2 sensors located below the fuse box under the hood mounted on the firewall. I've also checked the 10 amp fuse inside the car located underneath the drivers side dashboard in the fuse panel. I was told that there is a cooling fan switch located on the motor that controls the fans. Can someone please help me in locating this switch. Thank you for any help.

:beerchug: :beerchug: :hail:
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willwren
PostPosted: Wed May 25, 2011 10:53 am 
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93 SSEi
95 SLE (SC)
97 Buick LeSabre
wally, we try to keep topics in this section focused on the problem and fixing it.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers
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Portal » Board index » Mechanical and Maintenance (no chat or performance) » Everything Electrical and Electronic

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