20 Most Recent 1999 Buick LeSabre Questions & Answers


Bad diodes are a common cause of alternator failure. The diodes are part of the rectifier assembly that converts the alternator's AC output to DC. The alternator's charging output flows through six diodes in the rectifier assembly before it goes to the battery and electrical system.
Some may still be functional but will soon fail and the alternator will need replacing.

1999 Buick... | Answered on Nov 20, 2017


Have a qualified tech do diagnostic's on it !
003 Fuel System Tests Scan Data Tests

1999 Buick... | Answered on Oct 10, 2017


It could be a wiring issue. Are you are using the correct bulb?

1999 Buick... | Answered on Oct 05, 2017


could be a problem starter relay or starter solenoid
if the battery lead goes straight to the starter , pull the starter and have it bench tested

1999 Buick... | Answered on Sep 06, 2017


Here's a quick and easy DIY for cleaning your car's headlight lenses: How to Easily Clean Automobile Headlight Lenses

1999 Buick... | Answered on Aug 27, 2017


The key cylinder sensor may be faulty. if you would like to bypass the system (works only if Passlock security module is ok) follow the link. How To Permanently Disable GM PassLock System

1999 Buick... | Answered on Jul 27, 2017


Hello xxgraffiti87,

Entire TELEPHONE offices have been caught in MUD-SLIDES:
The documented recovery process is to IMMEDIATELY remove all power... Water wash (fire hose) the equipment...

Air pressure clean the equipment and place massive fans while measuring humidity...

Restore power ONLY when humidity is at or below normal.

All that to avoid ELECTROLYSIS...

~~

In addition to the Battery distribution...
you have a GROUND distribution...

If you suspect an OPEN circuit... it is an IDEAL APPLICATION for a wire TONE-TRACER ... (see example below)
(they ONLY work on "open" circuits... You may have to pull a fuse of bulb to PROPERLY trace...
but it can find a multitude of troubles)

BEFORE you get to very exotic about key readers, transponders...
ELECTRONICS (et al).. You need to check your BODY grounds
(specifically)...

Lights working/not working is a good sign...

What SHOULD have been done was to
REMOVE ALL POWER... (keep off until totally dry)...
WD40... & compressed air... LOTs.

NOW... you might be able to clean corrosion with commercial corrosion cleaners... Brass bristle brush ... (
try not to remove or further damage the FACTORY SURFACE).

No sloshing or firehoses...

I use white vinegar & Q-Tips... Followed with clean water... then
Isopropyl Alcohol (70% or better)... Lots of AIR...
AIR DRY (for days)... Sparingly apply a anti-oxidant
(again... I first apply WD40... (water displacement)
Clean it all away & apply white lithium grease...

WD40 also sell a WHITE LITHIUM GREASE...
Do not confuse with the WATER DISPLACEMENT PRODUCT...!!

WD 40 Wikipedia

With power applied corrosion/oxidation will grow
quickly & should be easily seen...

Use FREE wiring diagrams to find main ground clusters.
(see below) brass wire, clean & dry all connections...
apply white lithium grease ...
(very sparingly to any visible corrosion)

Sealed units (like headlight relays... You have a BUNCH)
You might want to consider going to a wreaking yard with
a picnic basket...

If they got submerged... it is HIGHLY LIKELY they are STILL MOIST (inside)... and will only get worse.

FREE drawings... (and Tech Bulletins) at
BBB Industries website (registration required)
BBB Industries Premium Alternators Starters Power Steering Products

TONE TRACER...
Extech TG20 Wire Tracer and Tone Generator Amazon com

Hope this helps.

Carnac the Magnificent

1999 Buick... | Answered on Jul 20, 2017


disconnecting the battery may reset it

1999 Buick... | Answered on Jul 17, 2017


The drain runs behind the front door pillars. It can get clogged with leaves and debris. The usual corrective action is to ream it out with a coat hanger (straightened, of course) with a small hook on one end.

1999 Buick... | Answered on May 28, 2017


computer needs to be program ...

1999 Buick... | Answered on May 15, 2017


take you car to autozone and let them check the battery and stuff and tell them to do a load test and post it on here

1999 Buick... | Answered on Mar 30, 2017


Have the engine control module scanned for fault codes, that is the first step.

1999 Buick... | Answered on Mar 02, 2017


Unless you know how to do automotive electrical testing suggest you take it to a qualified repair shop .

1999 Buick... | Answered on Feb 20, 2017


Quickest way is by removing the fuse that supplies power to the interior lights.

1999 Buick... | Answered on Nov 13, 2016


What about it ? oh by the way there are three relays . What fan ? Radiator or blower motor

1999 Buick... | Answered on Oct 22, 2016


No. The barometric is built into the MAF sensor. The map sensor on you car is by the coil pack for 3.1 engines. On 3.8 it is on the plenum in the center at the front of the engine.

1999 Buick... | Answered on Oct 15, 2016

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