Question about 1987 Cadillac Allante

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87 cadlliac allante battery drains with car off. cant find schematics. maybe the electric convertible motor?

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Fuses are under ashtray, #8 & #25 + breaker 24 are known issues but various items run off them, u need mechanic unles u know how to trace electrical.
Known issues : definately 1987-88 & also some other years :
MAKE sure your center console is closed & Latched or lite will stay on.
At nite look see if your vanity mirrors lites, or "dome" lites or trunk lites, or brake lites are on.

Posted on Oct 19, 2012

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Check to see if dash lites stay on at dust or nite when u see lite on it seems to happen at nite sun comes out it will go off thats in ur lighting system iam working on it now.

Posted on Jan 20, 2011

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I have a 87 caprice got a new battery and its dead in two days.


1. IF you have been driving it then the alternator may not be providing the power needed, the system is drawing on the battery and the battery is not being charged either when the engine is running. You should have the alternator checked.

2. If you alternator is good and the car has just been left sitting and the battery has drained then you have an excessive electrical load drawing power from the battery whilst the car is turned off. . It does not take much to drain your battery so you cannot start the car in just a day or less. A power widow motor or power seat motor that has power switched to it because the switch is bad is enough to run down the battery leaving you with insufficient power to start the car.

3. Other issues

Solving Automotive Electrical Problems

Dec 11, 2015 | Cars & Trucks

1 Answer

My 1990 Cadillac Allante suddenly won't shift into 3rd.


maybe a diagnostic or limp mode, try resetting codes / ecu by disconnecting and reconnecting the battery. If that fails check for loose or disconnected electrical wires.

Jun 27, 2015 | 1990 Cadillac Deville

2 Answers

Ran car on friday now wont even turn over its dead


Hot weather often causes weak batteries to die. Try a jump start and go to AutoZone for a battery and charger test.

Jun 11, 2014 | 2007 Mitsubishi Eclipse Spyder GT...

1 Answer

Convertible top


Taken from answers .com There are several fuse boxes on the Cadillac Allante. I know that, in particular, the 1993 Allante has a fuse box in the trunk, right next to the battery, underneath the ashtray assembly, and then one more in the engine compartment. For the one in the trunk-- lift the trunk. Facing the rear of the car, looking at the back window, move over to the right rear wall of the trunk and flip up the panel there. It is a carpeted panel that is not obvious. Shake that panel a bit and you will see that you can flip it up. I believe it has some Velcro tabs that keep it down. There is a fuse box sitting there inside the shell of the body once you open that flap. You won't miss it. For the one by the battery, which is located within a shelf behind the passenger seat---slide the carpeted shelfing facade towards the passenger's seat.

Oct 20, 2013 | 1993 Cadillac Allante

1 Answer

How do you reset service engine soon


I've owned my '87 Allante since day 1,, Dew Caddy, Cadillac Nick & currently CARL'S COMPLETE AUTO ( Largo Fla 727.277.3625) are only mechanics to touch my car. Carl is brilliant on any mechanized vehicle,, & has become fascinated w/ diagnosing & repairing Everything on the Allantes.... friendly & wayyyy less $$ + guarantee. 185e862c-55ed-4aaa-a24e-8d34dd731fc0.jpg

Aug 20, 2013 | 1990 Cadillac Allante

1 Answer

Fuse 8 on 1990 allante is drawing down the battery. will completly drain battery in 2 days


Have you checked BCM input parameter BI61? That is the most common cause of the 2-3 day battery drain. Have you tried pulling fuse #8 under the ash tray for the CPS to see if that stops the drain? You can pull one of the plugs off the AC blower control module to isolate that. If you can not hear the blower motor running with the key off, that probably is not an issue.

Sep 05, 2012 | 1990 Cadillac Allante

1 Answer

1989 Allante windows not powering off after 10 minutes or door opened


The window switches would not drain the battery, but the lights could.
Is there a timer for just those lights, or all of the courtesy lights ?
How do the door switch lights get power ?

Aug 19, 2012 | 1989 Cadillac Allante

2 Answers

I cant find the turn signal flasher relay on a 87 cadillac allante


In 1980 model vehicles this is usually attached to a wiring harness hanging free to the side of the interior fuse panel. It is about 1 inch in diameter and a metal top round type relay.

Aug 28, 2011 | 1987 Cadillac Allante

1 Answer

Code 48 appears with the 93 Allante. It says EBTCM modular problem or a Brake pressure modulator, Information center on car says Traction disabled, abs disabled and low brake fluid The red brake light...


Before replacing any expensive parts replace the brake fluid sensor. disconnect the electrical connector. squeeze the two tabs together and push it out slide the new one in and connect the electrical connector, then road test it. This sensor is on the bottom of the brake fluid reservior, you DO NOT have to drain the fluid out

Sep 11, 2010 | 1993 Cadillac Allante

2 Answers

Battery runs down over night due to electrical short


Google for Allante Service Tech Bulletins, Battery Parasitic Draw. & what year ur car is.
1987 -88 have probs w/ Fuse # 8 & 25 + circuit breaker 24 - fuses under ashtray.
Theyre brilliant cars but now 20-25 years old & many not properly maintained...
If ur gonna own an Allante go Ebay & get a Service Manual.

Jul 30, 2009 | 1987 Cadillac Allante

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