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Fuse 13 burn all the time

Tiny
EFFI LAHAV
  • MEMBER
  • 2000 CADILLAC DEVILLE
  • 130,000 MILES
In my Deville 2000, fuse #13 blow all the time. I checked that there is 12v from the DIM To one side of the fuse, I checked the license plate lights, and all o.K., No shortage or cuts in the wires.
Where can I look that can cause the fuse to burn?
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Wednesday, December 21st, 2011 AT 8:14 PM

64 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
You need a wiring/fuse path diagram.
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Wednesday, December 21st, 2011 AT 8:54 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
Thats what I have, but I realy dont know, were to get from here.
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Wednesday, December 21st, 2011 AT 9:11 PM
Tiny
FIXITMR
  • MECHANIC
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Well, it looks like DIM and multi switch are on same fuse.
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Wednesday, December 21st, 2011 AT 10:02 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
The DIM and multi switch are on fuse #13, thats blows. The DIM output (to the the fuse) is 12v which O.K. What units do I need to look for shortedg?
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Wednesday, December 21st, 2011 AT 10:29 PM
Tiny
FIXITMR
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Unplug both items and replace fuse. Plug back in to see which is offender
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Wednesday, December 21st, 2011 AT 10:30 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
Which unit is the "multi switch" ?
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Wednesday, December 21st, 2011 AT 10:33 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Its your steering column turn stalk(and more).
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Wednesday, December 21st, 2011 AT 11:36 PM
Tiny
EFFI LAHAV
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  • 37 POSTS
Yes it is. No problem. ?
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Thursday, December 22nd, 2011 AT 2:06 AM
Tiny
FIXITMR
  • MECHANIC
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You lost me. Diagram shows 3 possible end points for voltage from fuse. 1 of them must be causing short. Have you found which 1?
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Thursday, December 22nd, 2011 AT 4:00 AM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
What I understand (and it’s not much, since I know very little about electrical). I can see:
1. DIM that provide the 12v to the fuse (so it cannot be shortage)
2. The Turn signal which works o.K. (Unless it can be short but I don’t know how to check)
3. The 2 license lights that also works o.K. (Unless it can be short but I don’t know how to check)

It’s possible that I think its all wrong, Can you please direct me how to check the 3 of them for short? (I defiantly can check for short)
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Thursday, December 22nd, 2011 AT 5:20 AM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Look at the possibles, and make it as basic as possible. Could the DIM be shorted, possible but not probable. Could the multifunction switch itself be shorted, possible but not probable. Could the license plate applique mounting bolts be anchoring the harness to the deck lid creating a direct short to ground, probable and possible. Remove the trunk lining, loosen the nuts for the applique, and inspect the wiring. Also check the pivot area, where the harness runs from the rear deck lid to the vehicle. It could be pinched in the hinge area. Looking at the schematic, if the DIMR fuse is #13, you can isolate all three circuit at the connector under the fuse block. It shows you in the upper RH corner of the schematic, that connector C! Is a 50 or 60(hard to read) pin gray connector body. From there, if you can find the two terminals(B4 single yellow, and A7 double yellow), you can do some diagnosing. Check the single wire terminal for a short to ground, and based on the result, check the double side. Now if you find a short on the double wire terminal, cut one away, and see which of the two is shorted to ground. If the fuse is continuously blowing, it should not be that hard to find. If it is intermittent in nature, you could cut all three wires, install inline fuse holders in each, and equip the fuse holders with either 7.5 amp, or even 5 amp fuses. When you have a problem, the open fuse will indicate which circuit to devote your effort to.
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Thursday, December 22nd, 2011 AT 5:53 AM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
Factoryjack, Thank you for the detail answer. I understand your answer but I will follow your direction on the weekend and I will let you know.
Have a Merry Christmas!
Effi
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Thursday, December 22nd, 2011 AT 9:51 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
Factoryjack
Factoryjack
I am following your direction, but I cannot find connector C. You say it’s a 50 or 60 pin gray connector body. Can you please direct me where its located. (I don’t see a gray, 50 pin connector anywhere...)
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Saturday, December 24th, 2011 AT 5:29 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
I am following "factoryjack" direction, but I cannot find connector C (50 or 60 pin gray connector). Can someone please direct me were can I find connector C?
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Sunday, December 25th, 2011 AT 2:05 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
It is under the rear fuse block. A 50/60 pin gray connector. Each connector will be a different color, it is the gray one you are looking for. C1
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Sunday, December 25th, 2011 AT 6:29 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
There is nothing under the rear fuse block onlt the base frame that the fuse block is attached with scres. (My car is 2000 deville).
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Sunday, December 25th, 2011 AT 6:56 PM
Tiny
FACTORYJACK
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Have you separated the base from the block itself?
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Sunday, December 25th, 2011 AT 8:13 PM
Tiny
EFFI LAHAV
  • MEMBER
  • 37 POSTS
There is nothing under the rear fuse block, onlt the base frame that the fuse block is attached with scres. (My car is 2000 deville).
Thast the pic for the rear fuse block under the back site.
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Sunday, December 25th, 2011 AT 8:15 PM
Tiny
EFFI LAHAV
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  • 37 POSTS
The plastic base? Into 2 peaces?
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Sunday, December 25th, 2011 AT 8:16 PM
Tiny
FACTORYJACK
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Yes, there are four clips that secure it to the base. Once separated from the base, there should be at least 5 connectors. 3 of which are 68 pin, and 2 are two pin at least.
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Sunday, December 25th, 2011 AT 8:19 PM

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