1992 Oldsmobile Cutlass Where is the location of cooling fa

Tiny
JOEISME
  • MEMBER
  • 1992 OLDSMOBILE CUTLASS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
Hi,

My cooling fan won't come on. I let the car run with the air condition and/or heater turned on at full range. The temp reaches 220 degree, but, the fan won't come on. I checked all fuese, every one is ok. I checked whatever relay I could find in front of the engine, inclduing the relay for the heater. All relays are ok. For some reason I am not able to find the relay for the fan. I found about 5 relays in front. I shorted the cotact (A to E) for each relay. Everytime something turns on which is not the fan. I have replaced the thermostat. I verified it works, becuase both the engine side and the radiator side of the top hose get realy hot when touched. The radiator also feels realy hot, but for some reason the fan won't turn on. Where is the relay for the fan located so that I can test it to see if my electric fan works.

Thank you very much for your help.
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Monday, December 1st, 2008 AT 6:54 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi:
cooling fan relays very seldom go out, I would check the cigarette lighter, first and make sure it is not shorting out. People spend lots of money buying water pumps, radiators etc, when it is not needed. On these cars the fans run on the same circut as the lighter.
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Thursday, December 11th, 2008 AT 4:56 PM
Tiny
JOEISME
  • MEMBER
Hi Jacobandnickolas

Thanks for your reply. You are right. It was not the relay. I spent close to a month spedning a lot of money and time changing parts and trying to fix a problem that would have been very easy to fix if I would been using logic a and seek proper knowledge before starting to change virtually all the parts in the cooling section of the car. All I had to do was to make sure about a bad part before replacing it rather than just guessing about what might be wrong. This requires first good undrstanding of what each part supposed to do and then finding out how to properly test it. I was misled thinking the relay was the cause of the problem becuase I work on some electronics equipment with small relays in them that the relay mostly is the first item to go bad in those parts. In my car, I found the relay by going under the car and disconnecting the fan connector. Out of the 2 wires in the fan connector, I determined which one was the 12V wire by using the continuity test with a multi meter, by connecting one contact of the meter to the wire in the connector that would bring 12V to the fan. Then I placed the other contact of the meter to each contact pin of each relay in front of the car, untill I found the fan realy. I tested the relay and it worked. At this point I was pretty sure the problem was the fan. I then attached 12V directly to the fan, fan did not work. I purchased a new fan motor for $35 and that fixed my problem. Apprently, with this type of cars fan going out is a common thing. Testing the fan at the very beginning would have been the easiest thing to do. I knew the fan was not kicking in when the car was too hot, so logically testing the fan should have been the first item on the list. But I guess this is all part of the learning. Once again thanks for your reply.
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Sunday, December 14th, 2008 AT 12:37 PM

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