need help with shortage in door locks 90 deville
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, need help with shortage in door locks 90 deville in Past Cadillac Vehicle Discussion; got a shortage somewhere which keeps blowing the fuse for the door locks and the interior lights..when you put the ...
  1. #1
    dallasj is offline Cadillac Owners Member
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    need help with shortage in door locks 90 deville

    got a shortage somewhere which keeps blowing the fuse for the door locks and the interior lights..when you put the fuse in you can see the spark at times, and other times it does not..sometimes they work but within a day it will blow the fuse...i looked at the wiring diagram from my alldata but its not very helpful...any ideas are appreciated..

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: need help with shortage in door locks 90 deville

    I'd check the rubber wiring duct between the door and the body. Those wires get flexed every time you open and close the door.

  4. #3
    Manic Mechanic is offline Cadillac Owners Fanatic
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    Re: need help with shortage in door locks 90 deville

    There's not a common fault for this in those cars but there are causes common to all cars. Well routed wiring like in a domestically designed and produced Caddy rarely go bad unless there's movement in the circuit. Suzuki's with 1/4 the wiring go bad just sitting there. Since the circuit goes into every door I would suspect it's going to be a short in the hinge conduit of the drivers door only because it has seen the most use over the years. If you can get a fuse in without blowing right away start opening and closing all the doors and trunk one at a time to see if you can find one that always causes the fuse to blow when moved, if you do look into the wiring in that hinge. You may need to slam each of them also. Also if your car has vanity mirror lights in the sun visors it could be the wiring where they pass through the visor swivel on the roof, those wires wear through over the years from the visor being flipped around. If the doors aren't changing anything try the visors.

    Good luck,
    Vernon

  5. #4
    Crudsturbo is offline Cadillac Owners Fanatic
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    Re: need help with shortage in door locks 90 deville

    Try the cigarette lighters in the door too..had a penny and a dime down in one and it would blow the fuse instantly a 15amp under the passenger side of the dash. Worst of all if I left it blown eventually my ignition module would blow. Weird but true. If the sockets are dirty or shorted they will blow it quick. Also if none of these tips work undo every door panel and unplug everything, including lights, then plug them up one at a time until the fuse blows to find the culprit.

  6. #5
    dallasj is offline Cadillac Owners Member
    Automobile(s): 1990 Sedan de Ville 1995 eldorado 2000 buick century
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    Re: need help with shortage in door locks 90 deville

    Quote Originally Posted by Manic Mechanic View Post
    There's not a common fault for this in those cars but there are causes common to all cars. Well routed wiring like in a domestically designed and produced Caddy rarely go bad unless there's movement in the circuit. Suzuki's with 1/4 the wiring go bad just sitting there. Since the circuit goes into every door I would suspect it's going to be a short in the hinge conduit of the drivers door only because it has seen the most use over the years. If you can get a fuse in without blowing right away start opening and closing all the doors and trunk one at a time to see if you can find one that always causes the fuse to blow when moved, if you do look into the wiring in that hinge. You may need to slam each of them also. Also if your car has vanity mirror lights in the sun visors it could be the wiring where they pass through the visor swivel on the roof, those wires wear through over the years from the visor being flipped around. If the doors aren't changing anything try the visors.

    Good luck,
    Vernon
    yeah i did look at the visors because i had the head liner replaced a few years ago..have isolated it to the drivers door so souldnt be to hard from here..your post helped get me going in the right direction..many thanks to you..

    ----------

    Quote Originally Posted by Crudsturbo View Post
    Try the cigarette lighters in the door too..had a penny and a dime down in one and it would blow the fuse instantly a 15amp under the passenger side of the dash. Worst of all if I left it blown eventually my ignition module would blow. Weird but true. If the sockets are dirty or shorted they will blow it quick. Also if none of these tips work undo every door panel and unplug everything, including lights, then plug them up one at a time until the fuse blows to find the culprit.
    yeah i had the penny in the rear lighter before as well..and was a great idea of taking the doors one by one that helped me figure out it was the drivers door..thanks

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