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MCVGreg
MCVGreg, Master Troubleshooter
Category: Car
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Experience:  25 + Years Working with Cars & Electronic Control Systems
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86 Oldsmobile Regency: cooling fan..stays..this a relay problem and if

Customer Question

The engine cooling fan in my mom's 86 Oldsmobile Regency 98 stays on. Is this a relay problem and if so, where is it located so I can replace it?
Submitted: 5 years ago.
Category: Car
Expert:  MCVGreg replied 5 years ago.

Hi Ken,

 

There are several relays under the hood, and I would suspect that you are right - one of more of them may be stuck in the ON position.

 

Here is a diagram of their location. I would start by "feeling" them to see if one is hot, and then remove that one first to see if the fan goes off. Then continue removing relays - one at a time - to see which one it might be. That should get you to the correct relay in the shortest period of time.

 

graphic

 

Please let me know what you find.

 

Take Care, Greg A.

MCVGreg, Master Troubleshooter
Category: Car
Satisfied Customers: 5941
Experience: 25 + Years Working with Cars & Electronic Control Systems
MCVGreg and 17 other Car Specialists are ready to help you
Customer: replied 5 years ago.
Greg... I check those, what I thought were the relays and two of them looked like it had melted plastic (black) or what appeared to be tar. I take it, that they are not suppose to look like that and that maybe they have gotten too hot. Does this sound reasonable?
Expert:  MCVGreg replied 5 years ago.

Hi again,

 

That sound very reasonable. Drawing a lot of current for a long period of time can get things hot! I think you are on the right track.

 

Try to be careful getting them loose. Melted plastic has a way of getting in the open areas. It may be necessary to "chip away" some of the burned plastic to get these out. Just take your time and try NOT to damage the sockets that the relays plug into.

 

Take Care, Greg A.

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