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10amp fuse (cooling fans) keeps blowing


chevyorange

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I have a 1994 STS Cadillac. My car temps are getting too hot at a standstill because the 10 amp fuse that controls the fans keeps blowing.

On the road I tried to cheat and put a 20amp in and it blew... and even a 30 amp to just get home and it blew.

What causes a fuse to blow nearly instantly? I'm kinda miffed!

In addition, the cruise control has stopped working. I don't see that these two fuses have anything in common, they're not on the same fuse (and the cruise control fuse doesn't blow).

Adam

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sounds like there is a short in the wiring for the fans. Check the connectors and make sure no wires are touching anywhere.

A good friend will come and bail you out of jail...BUT, a true friend will be sitting next to you saying, "darn...that was fun!"

www.madd.ca

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If I am not mistaken, the AC compressor clutch is on that same circuit. Next time it blows see if the AC clutch kicks in when you turn it on and down to 60. You might have to pull the plug on the clutch on your compressor. If that is the problem your hub bearing got hot enough to short out the windings.

This happened on my 96, do a search under Scotty and compressor and blowing fuses and AC Comp.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Useing a flashlight, look closely at the bottom of the passenger side fan. If the wire loom there is not tied down properly, the fan ring will cut through them while spinning; likely stopping the fan and/or allowing the wires to short together.

Also check the drivers side fan, for same condition.

If wire insulation's are damaged, just carefully separate them, apply electrical tape, and after reconnecting the plug, make sure that the wire loom is tied away with a nylon tie-strip; to prevent future damage.

-George

Drive'em like you own 'em. - ....................04 DTS............................

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I have a 1994 STS Cadillac. My car temps are getting too hot at a standstill because the 10 amp fuse that controls the fans keeps blowing.

On the road I tried to cheat and put a 20amp in and it blew... and even a 30 amp to just get home and it blew.

What causes a fuse to blow nearly instantly? I'm kinda miffed!

In addition, the cruise control has stopped working. I don't see that these two fuses have anything in common, they're not on the same fuse (and the cruise control fuse doesn't blow).

Adam

For the moment, I wouldn't be concerned about the cruise control.

What causes a fuse to blow nearly instantly? Very simple: a direct short to ground. If a double or triple sized fuse still blows instantly, you have a direct, solid, bigtime short circuit directly to ground.

Here's a good troubleshooting technique: lift the negative cable off the battery and connect a 12 volt test lamp between the battery's negative terminal and the cable you just removed from the battery. If signifigant current is being drawn from the battery, the test lamp will light; it shouldn't light unless you have placecd a meaningful load on the battery. Typically less than 50/1000 of an amp will be drawn from the battery with all accessories off and the test lamp should not illuminate.

If the test lamp lights up (indicating a short circuit), as I suspect it will, begin moving fan wires around until it goes out. When the light goes out, you are in the area of the defective wiring.

If the lamp does NOT extinguish when you move the wires about, you likely have a defective component i.e. a shorted fan motor etc.

BTW, it's NOT good practice to replace fuses with one of a higher current rating. But I'm sure you know that. :)

Regards,

Warren

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Very good point Warren about the larger fuse, I saw that, but it did not occur to me to to comment on it. Maybe a photo of baby would be appropriate inserted here :(

How about the nuts that used to put a penny in the fuse box or wrap them with tin foil because they were blowing under load... Oh that fixed it from blowing :blink:

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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A (much) larger fuse can assist in locating the specific area or component that is causing the heavy load. The smoke and aroma will lead you right to the problem.

The downside is the eventual repair will be much more extensive and expensive.

Jim

Drive your car.

Use your cell phone.

CHOOSE ONE !

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A (much) larger fuse can assist in locating the specific area or component that is causing the heavy load. The smoke and aroma will lead you right to the problem.

Us old folk used to call that wired for fire. Elsewise known as smoke the bastard out.

Regards,

Warren :lol:

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Very good point Warren about the larger fuse, I saw that, but it did not occur to me to to comment on it. Maybe a photo of baby would be appropriate inserted here :(

Surely, you didn't mean this photo?

http://s7.photobucket.com/albums/y299/WBuc...arbequeTime.jpg

Did you?

Or, this: http://s7.photobucket.com/albums/y299/WBuc...ent=Endgame.jpg

I hope not.

Regards,

Warren

Posted Image

There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Ugh, that's terrible. Yep that's the one. Using a larger fuse is a great way to have that happen.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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There's a page on this board on how to pull the codes:

http://www.caddyinfo.com/readingcodes.html

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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  • 8 years later...

Hello , I have the same problem on my seville sts, the fuse blows, cruise control does not work .... how did you solve the problem? I have some knowledge of auto electronics but I'm stuck here. I figured out that I have occasionally short on the thin brown wire, which leads from fuse into the cabin, and disappears into the outer casing below the instrument panel. Please help!

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The cooling fan fuse blows? You are going to need to trace the wires until you find the short to ground.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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