20 Most Recent 1993 Buick LeSabre Questions & Answers

Not much on the codes, but lots on resetting. https://www.google.com/search?q=1993+Buick+Lesabre+PCM+reset+code+88+reset ..

there may be a broken wire from the ignition swith going down the steering column,theres two sensors at the begining opening of switch, sometimes they get stuck and dont pop back out, in turn it doesnt touch the chip on the key and cant read it,take a look with a light use a small pic and push lightly on them and see if the y push in and pop out, if they do then replace ignition swith,theres a way to bypass,use an omh meter and measure resistance of key chip, then buy a resistor with the same value,and connenet to wires from switch under the dash,cut wires and put conecting the two going to switch with resistor connecting them together,heres a diagram,

The tdm ( theft deturent module ) for the car is above the hvac case behind the glove box . Lower the glove box and release the catches on the glove box to let it fall all the way down and the module is way up above the hvac case. The easiest way to by pass the vats system as long as the module is good is to measure the resistance of the pellets on the key and go to radio shack and get resistors that add up to the resistance of the key and wire them into the wires at the bottom of the steering column.This will trick the system that you are using the proper key .

Control head is failing

check the battery voltage and make sure the terminals are clean

Apparently on my 93 buick lesabre. It's located on the passager side just behind the front tire. Where the fuel lines go up ti the engine.

On this website you find fuse box diagram and description for Buick LeSabre (1994) http://www.carknowledge.info/buick-lesabre-1994-fuse-box-diagram

I had this happen on my Regal. Ended up being the switch under the brake. Also check to see if your brake lights work.

Google it. You'll find a you tube video for just what you need to do. Just type into your search bar "1993 Buick LeSabre A/C clutch replace" and you'll find what I mean. A list of different tutorials to do just what you need done. I've used this method myself. The video's are usually done well and are complete. I can understand your situation.

It sounds to me as though your fuel tank needs to be flushed out. Even with a new fuel filter they can clog down enough to maintain flow but not have enough flow for your engine.

Testing the electrical circuit's for the starter is how to find test type problem's . Voltage drop testing . How to voltage drop test starter motor circuit Looking at a wiring diagram to see what all is involved in your vehicle's starter system would be the first step .Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. Year , make , model , an engine size . Under system click on engine , then under subsystem click on starting . Click the search button ,then the blue link . Is the vehicle SECURITY light lit on the instrument cluster .

Hey Cap'n, all the heat and A/C is actuated by the controls and these controls are ALL vacuum actuated. Make sure you have vacuum to the controls from the engine. There's a 4 inch round ball under the hood on the pass side near firewall. This ball is the vacuum reservoir, must have vacuum to and from then thru the firewall to said controls. If there's vacuum everywhere, it HAS to work properly. Check all vacuum lines for leaks, cracks, connections, all the above.

What is the vehicle? Sounds like you have junk now.

Has the ECT sensor been replaced, are all the sensor connectors in good condition, what fault codes are you getting when testing the system at the diagnostic port under the dash on drivers side? If you have not tested for fault codes here is a link to how it is done, the codes are read through the engine light blink method. FAQ How to read older GM codes for free

Lose connection , broken wire inside the insulation . Where on the vehicle is the wire , how many wire's ? is it a whole wiring harness ? What color wire ? Open up the wiring harness an check the wire's one at a time . Pull on the wire's an see if one comes apart . If the wire is broke inside it's insulation you won't need to pull real hard for it to come a part .

Same circuit. The dash lights and all parking lights (front and rear) are all on one circuit.