20 Most Recent 1998 Buick LeSabre - Page 2 Questions & Answers

Hard to say - using the data port to program a remote is unusual, and depending on what device or procedure you used, you may have screwed up the datalinks. You should start by using a code reader to see what trouble codes exist.

Starter enable relay is under the hood in a fuse box that runs along the bottom of the windshield wipers, there are (2) twist knobs and (1) wing nut in the far left hand corner of the fuse box cover. remove cover. now you will see a group of smaller fuse box remove covers and look inside there will be I.D. to tell you which is which.

Looking at the end of the solenoid on top of the starter, the battery cable hooks to the larger stud on the top "12 o'clock". A smaller purple wire connects to the smaller terminal at 3 o'clock and the stud at 6 o'clock connects to the flat wire coming out of the starter. The purple wire comes from the neutral/park safety switch, which is fed by a yellow wire coming from the start relay which is fed by a yellow wire coming from the ignition. The start relay is also controlled by the Pass Key decoder module. Hope this helps, as for starters.
Check the fuel pump relay

The fuel pump relay is located to the right of the glove box.

Remove three 8mm screws (along the front edge) and a wingnut (drivers side near the accelerator) to loosen the insulation panel. Twist out the light courtesy light and using a pair of pliers squeeze the plastic nipple to remove the SIR. Remove the insulation panel from the vehicle.

After the insulation panel is removed, the fuse/relay panel will be to the right of the glove box. The insulation panel should have a diagram of the fuse/relay panel layout.

The relay should be in the left column of relays just above the fuses.

A Good contortionist with small hands and this can be done in about 15 mins.

Try spraying some carb. cleaner or starting fluid into the engine . If it starts you have a fuel delivery problem , if not check for spark .

What shop did you take it to ? The charging system on your vehicle is computer controlled and so is the volts indicator gauge. Have you tried the buick dealer ?

Hey Baptized, You need to replace ALL the gaskets that seal coolant from ANYTHING... You may have a cracked head, cracked intake manifold,, or at worse a cracked block - between the coolant passages and the combustion chamber area...If you have a aluminum intake and cast iron heads.. this is a potential leak creator when the engine gets hot and cold quickly...make sure ALL the gasket surfaces are CLEAN.. and use: http://www.oreillyauto.com/site/c/detail/PERN/80064/N2362.oap DO NOT use silicone sealant - period!

Sorry, But that's still a major issue. Is it a GM module or after market?

Is the security light on and flashing? If not the problem is not the passlock, but if you wish to bypass it here is how you do it. How To Permanently Disable GM PassLock System

Here's a link to a video on how to change the serpentine belt...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/

You will want to keep this diagram to help ou know how to route the belt when you replace it...

Could be other bad pulleys. Look at the belt inline with the pulleys. If one is bad, you will see it misaligned. With the belt off the pulleys should have very little to no play and should turn by hand smoothly.

There is no cut off switch, but you may be experiencing a security failure if the vehicle is not starting. http://diy-gm-security.com/

When you turn the key on the fuel pump should pump for about five to ten seconds. Do this a few times and it should start. Even with a full tank the pump will do this to pressurize the system. If the pump keeps running it's not picking up fuel. Have a friend listen at the gas cap with the cap removed for the pump to cycle. If it doesn't work there is a fitting on the fuel rail that looks like a valve on a tire. Take the cap off of it and use a small screwdriver to push the center in and see if there is pressure in the fuel rail. Have the key on and wear safety glasses.You should get a squirt of fuel out of it. If you have no pressure there the pump could be bad or the filter plugged. If there is pressure you have other problems. There is no shut off switch. Only fuses and a fuel pump relay. https://www.google.com/search?client=ms-android-samsung&source=android-browser&ei=_skGWP71NoOFmwGwvp-YCw&q=1998+buick+lesabre+fuel+pump+switch+location&oq=+1998+Buick+le+sabre+fuel+pump+switch+location&gs_l=mobile-gws-serp.1.0.30i10k1.20246.66235.0.71699.52.41.2.0.0.0.354.6560.4j26j8j2.40.0....0...1.1.64.mobile-gws-serp..17.35.5853...0i10k1j0i7i10i30k1j0i13k1j33i21k1j33i160k1.pAvwOOuWlKU#imgrc=99du9RTFFGCYhM%3A&scso=uid_WAbKSQAIdFcKJtQCGQCAqw_8:0

Horn button or wiring issue. Does the relay click whenthe button is pressed?

VEHICLE RELAYS Operation Diagnosis Find the horn relay an test the circuit ! Horn Relay Center rear of the engine compartment, below the RH maxifuse?® block Horn Component Views in Horns -- Horn Switch Left front of the passenger compartment, on the steering wheel Do you know how to do electrical trouble shooting ?

How long since a tune-up? Are there any applicable trouble codes? If it cranks but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check for fuel injector pulse. If your missing all three, check the crank sensor. Could be other issues? Don't replace anything unless your testing points in that direction.

Visit this website for info http://www.diy-gm-security.com/ Vats on that vehicle can be completely and 100% eliminated with a bypass product.