95 Bonneville SSE fans not turning on - Page 4 - 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 06-02-2011, 11:26 AM   #31
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230F isn't really high. Fans come on at 228F, so 230 shouldn't make anything seem to run odd. It it'* getting much higher than that, then yeah..it could be overheating. The thing is.. you aren't 100% sure if it'* the pcm or something else and the way to test that is to see what it says for temp on a scanner to compare to the gauge.
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Old 06-02-2011, 04:30 PM   #32
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Putting all that aside, the fans aren't working. It'* mid 90'* outside and I've sat in stop and go traffic for a while watching the gauge read 250... so even if it was off by 20 degrees the fans should still come on.
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Old 06-02-2011, 05:03 PM   #33
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The car is getting hot.
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Old 06-02-2011, 05:12 PM   #34
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OK, as Bill pointed out, you have one sensor in this car, but that one sensor is actually 2. One for the dash gauge, the other for the PCM. If there is a problem with the sensor that tells the PCM the temp, the fans will not turn on. You will need a enhanced code reader to get that information from the OBD2 plug. Or you can just swap out the sensor, it don't cost much and it'* not that hard to do.
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Old 06-02-2011, 07:01 PM   #35
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The sending unit that tells the gauge the temp is brand new. Do you happen to know the location of the sensor for the computer? Like I said I replaced a sensor located near the water pump that looks identical to the one that you guys linked me to. Is it possible that I have an older/ newer engine than a 95 that just got put in there and has the coolant temp sensor located at the water pump? I replaced that sensor because it got sheered off during the water pump removal
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Old 06-02-2011, 08:40 PM   #36
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were the wires on when this happened? maybe the wires got messed up
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Old 06-02-2011, 10:52 PM   #37
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I have no information about the inner workings of the engine swap. It happened before I purchased the car. Everything else runs perfectly fine besides the fact that when I go into reverse and change into drive without either applying the gas a little or being at a complete stop, the car will stall.
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Old 06-02-2011, 11:03 PM   #38
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95s have been known for bad PCMs, at least I think it'* 95. Bill should have more information on that.
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Old 06-03-2011, 09:18 AM   #39
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I'm not thinking it'* a pcm. Not without looking at what the pcm sees for a temperature. The dashboard'* are known issues. I can take a picture of my car running for ya if you'd like proof. Theres no way my oil pressure is 80psi or that my voltage is 18volts. I've confirmed both via scanning and manual pressure gauge. I've also seen many cars where the temp was in the red and the temp via pcm wasn't....

So here'* how I'm gonna lay out my advice. Take it. I've given many good suggestions, asked for a picture of the sensor you replaced etc and so far... you haven't provided anything back to help out. Therefore while I'd like to help, it'* very difficult when I'm blind and have no information.

If your engine is an L36, which can easily be verified by pictures, looking at the side of the block where it says "Series II" or any of a few other ways.. then there is no sensor on the passenger side. If your engine is Series I then there were two sensors. They were identical, one was under the throttle body, the other was on the driver side back of the intake manifold.

Like I said though,..as soon as you help us with information/pics, we can help you better.
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Old 06-03-2011, 03:40 PM   #40
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I'm not trying to anger anyone here. I go to school full time and work when I'm not in school. I'll get you pictures but you're going to have to bare with me and try not to get mad at me
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