96 Road Master Electric cooling fans - Chevy Impala Forums
Buick Roadmaster General and Technical discussion for the B-Body Buick Roadmaster (1991-1996) and Oldsmobile Custom Cruiser (1991-1992).

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post #1 of (permalink) Old 11-27-2009 Thread Starter
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96 Road Master Electric cooling fans

In my short time of owning a 96 Roadie, I have noticed that one of the electric cooling fans will come on when the defroster or air conditioning is being operated. My question is; seems like only one fan comes on and that is the one closest to the battery. When are both fans supposed to come on,or does it sound like I have a problem with the other fan? Thanks in advance for your help. ed
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post #2 of (permalink) Old 11-27-2009
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prob comes on when its near overheating if ever i have my 2 caprice fans hard wired to my underhood fuse box and there ALWAYS running , keeeps my car cool but a little to cool in winter months when u wan heat right away o well though

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post #3 of (permalink) Old 02-23-2010
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It is normal for one fan to come on with a/c or defrost. The driver side fan will come on later if the temp gets to 222 degrees +/- 5 degrees
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post #4 of (permalink) Old 02-24-2010
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I'm having issues with the fans in my 94, here's the deal.....

my fans would only work with the AC on and when the compressor seized i unplugged the clutch and my fans still worked and now that i have deleted my AC compressor completely the fans no longer work at all, temp gets above 3/4 if i stay still too long, would probably go higher if i let it, i have checked the fuses and they're all good, i don't see any bare wires anywhere that would ground the fans, they just simply don't work anymore, i know there are 2 fan relays under the hood, 1 primary and 1 secondary and I'll be changing those out in the next week or so but any advise is welcome at this point.....

thanks

also, it looks like i don't have a thermostat for the fans, can anyone tell me what it looks like and where to find it so i can double check that, pics are worth 1000 words.......

thanks again

Last edited by PorkChopFON; 02-24-2010 at 08:00 AM. Reason: little bit more info
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post #5 of (permalink) Old 03-30-2010
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The fans run independently. They each have their own coolant temp threshold(around 210/220), and they each have their own A/C head pressure thresholds.

~Cory Magner "My name is Cory, and I'm an addict."


95 DCM Buick RMS 14.21 @ 91.79 "Jesus" Blown Engine at 85k
95 DCM Buick RMS 13.52 @ 99.33 "The Doctor" Blown Engine at 180k
96 DGGM Buick RMW. 263k, still on the factory tranny.

And 5 other LT1 powered land yachts Is there Rehab for this Sh*t?
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post #6 of (permalink) Old 04-22-2015
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on a 95 buick roadmaster i see 4 wires going to fan 3 black 1 green which is hot which is ground
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