20 Most Recent 1986 Cadillac Seville Questions & Answers


if it is not EFI there will be no fault codes
if the fan is on the water pump then it will be a viscous fan (clutch ) hub and needs to be replaced.

1986 Cadillac... | Answered on May 17, 2015


If it is a automatic it may be low on transmission fluid.If fluid is full smell it if it smells burnt you need a transmission rebuild.If stick shift you may need clutch adjusted or have broken synchronizers.

1986 Cadillac... | Answered on Mar 19, 2013


there should be a diagram under the hood or in your owners manual. if not its always a good idea to have a repair manual and it would include that information. haynes or chilton would be the best and they are usually pretty cheap (10-20 bucks)

1986 Cadillac... | Answered on Feb 12, 2012


First make sure the battery is disconnected, if you are simply replacing the starter, hook the terminal to the same place as the old starter, if you are replacing the wiring, follow the same path as the old wiring. If there is no old wiring to follow, you will need a diagram or another similar engine, mabey at a wrecking yard to follow.

1986 Cadillac... | Answered on Jul 24, 2010


Most likely ,a bad bulb in visor

1986 Cadillac... | Answered on May 26, 2010


transmission has gone out also check tranny fluid

1986 Cadillac... | Answered on Mar 14, 2010


on GM cars, it can be numerous issue, im surprised he not pulling any code, did you take it the dealer or one of the small garage mechanic. they are two different breed and may have the right equipment or updated computer. have you air mass/throttle sensor check common problems at idle the engine stall. you cant fix the unit, it has to be replace if it bad, check ebay for used if needing to replace the unit

1986 Cadillac... | Answered on Sep 26, 2009


The key switch is probably worn with two affects it may be you can remove the key before it is properly turned off or is worn internilay.

1986 Cadillac... | Answered on Aug 06, 2009


Hi! Seeing that u have already checked the fuses and they are ok,u should now check the bulbs and the switch.

1986 Cadillac... | Answered on Jan 02, 2009


The Haynes repair manuals are very good about showing the wiring diagrams for all wired connections. You can go to or contact the dealership and ask if they have one for free. Most wiring diagrams are going to cost if you have lost your owners manual.

Cadillac Seville... | Answered on May 17, 2019


This series of videos should help you... you can jump by clicking on the small screen shots to the right. Transmission Fluid Level Check Cadillac Seville 1998 2004 2003 Cadillac...
Transmission dipstick is under the air intake and is a black plastic plug that unscrews the arrow in the photo shows the general area ..lift off the air intake for access.

caddy trans dipstick-p23wqfqgufz51qmknuxez1rh-4-0.gif

Cadillac Seville... | Answered on Jun 23, 2018


The best solution you'll get from books at www.reliable-store.com

These are books containing info on repair, service, troubleshooting, par ts info, assembling dissemble, removal, error/fault codes, wiring diagrams and everything on any vehicles cars, atv, trucks. forklifts, boats, excavators etc

Cadillac Seville... | Answered on Jun 14, 2018

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