Dual Electric Fans Not Working - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-29-2007, 11:07 PM   #21
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Yes, there is a jumper on the other side and it has a good connection. I need to learn more about electricity........I'll try to do as you suggested. One things for sure, both fans did operate for a split second when I was crossing the wires on the relay connector, so I'd say with confidence that the fans motors aren't siezed.


Oh my Bonne liys over the ocean.................oh how I want my ol Bonne back.
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Old 04-30-2007, 08:32 AM   #22
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Good stuff you got here Frank. You know that you have power going to the relays, that the fans work and that the only question I see left is are you getting the ground signal from the PCM to actuate the relay and turn on the fans.

Now..here'* the million dollar question. Are your temps according to the gauge accurate? Reason I ask is I fought the fans on my 1995 to find out that my gauge read higher and due to it'* lying I was looking for the fans to be on when the PCM didn't want them on.
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Old 04-30-2007, 11:26 AM   #23
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Bill, I have a drilled 180 stat and at normal cruising the temperature shows apprximately 177 degrees when I convert from Celcius. When it idles for about 20-30 minutes it'* as high as 235 degrees. If the gauge is off, it'* not off by much. As for the ground from the PCM, you're not going to believe this but I don't know where the PCM is located or what it stands for. I think that'* the computer isn't it? Aslo when I did the test of turning on the A/C and putting in on defrost, the fans didn't tun on.


Don't I feel stupid..
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Old 04-30-2007, 11:32 AM   #24
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the PCM on your 95 is up under the dash above the passenger foot panel.. there are 3 connectors on it, red, white and blue.. and yes, its your car'* computer

PCM stands for Powertrain Control Module
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Old 04-30-2007, 02:36 PM   #25
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Franko... going to your relays are 4 wires. One is battery power and thick.. probably 30 or 87, the other is output to the fans.. the other of the 30/87 pair. The other two..one should have power and the last one is a trigger or the ground from the PCM to the relay to actuate it.

You can..run a switch to the high speed relay as Wren did and call it an override. That way you can turn then off and on yourself.

On what the gauge reads. Yes..low side..mine read perfect..high side there was degradation. That is why we'll test it and help you out. Meanwhile..maybe the override is the way to go.
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Old 05-07-2007, 09:47 AM   #26
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While driving this weekend I had to shut off the engine at every traffic light to avoid the car going over 240 degrees F. Since both fans turn on when I cross over the wires on the coolant temperature sensor, I was thinking:

1. add a switch to bypass the sensor and turn it on when I start overheating and then purchase a Coolant Temp. *. at 50% off in the US at NEBF.
2. Bite the bullet and just purchase one here and change it before we leave.

I'll decide by the end of the day.
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Old 05-07-2007, 09:53 AM   #27
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By shorting the wires..you may be telling the PCM a temp that'* high enough to turn on the fans.

I'm no longer suggesting this to you Frank, I'm telling you. Wire up an override switch. Get to the US where scanners exist. We'll then find out what is wrong, fix the correct part or adjust your way of thinking about your temp gauge if needed.

Don't spend another dime on the fans until you are here.
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Old 05-07-2007, 10:17 AM   #28
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Well, I must say, when BillBoost37 changes for a suggestion to a "I'm telling you" then past history dictates.......Do It. With that being say...............Yes Sir! Got to search for some 18 AWG wire, couple of connectors, one switch and an electrical 101 book.


I must say that I like the sound of "Don't spend another dime on the fans until you are here."
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Old 05-07-2007, 10:34 AM   #29
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Quote:
Originally Posted by Maymybonneliveforever
I must say that I like the sound of "Don't spend another dime on the fans until you are here."
I'm working on boosting the US economy.

Clean that room til you find the stuff you need. Then rig this up. Any questions..either post here or refer to the WillWren post .
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Old 05-07-2007, 10:42 AM   #30
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I'm not allowed to post here since I've been sentence to the tool room for the day. I'll have to post later one. Siga..................Friga....................... do.


Bill, I swear when I post pictures of the before and after, you'll know I did a lot of work cleaning up.


Ok........I'm off.
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