Question about 1998 Cadillac DeVille
Locate cooling fan relay
There are three cooling fan relays in the fuse block under the hood.
The fan relays above are numbered 37,39 and 40
Relay 37 is RH fan
Relays 39 and 40 are LH fan.
You can check if your fans are working by switching on the air con.
Are you having overheating problems?
Posted on Apr 26, 2010
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Posted on Jan 02, 2017
Radiator cooling fan is not electric, it is driven by a silly hydraulic pump which is located low on the passenger side of the engine above the alternator. All 2000-2002 LS's have this system. Most likely either the motor or pump has failed.
Posted on Aug 17, 2010
Testimonial: "good advice"
Under the hood on the drivers side, just forward of the shock tower, you will see what is called an "under hood fuse center". On the cover you can see the various fuses and relays that are located in the fuse center.
One of those relays is the coolant fan relay. Remove the top cover of the fuse center to gain access to the relay.
Hope this answers your question, good luck.
Posted on May 02, 2009
SOURCE: LOCATION FAN RELAY
The relay is under the right front headlamp assembly and bracket. You can access it two ways. Remove the front bumper facia, headlights, and bracket assembly. The grill is part of the facia and the headlight bracket runs all the way across the front. Or you can remove the right headlamp and use a hole saw to cut through the bracket, it is a plastic material.
Posted on Apr 26, 2009
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When the A/C is requested and the ambient temperature is more than 50?°C (122?°F).
A/C refrigerant pressure exceeds 1310 kPa (190 psi).
After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140?°C (284?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.
The PCM commands High Speed Fans on under the following conditions:
Engine coolant temperature reaches 110?°C (230?°F).
A/C refrigerant pressure exceeds 1655 kPa (240 psi).
When certain DTCs set.
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