On a 98 buick lasabre it does not start, battery is good, starter works(but no power to exciter wire when cranked), starter relay fine. I was wondering what was left to check, fusible link, park neutral switch, ingnition switch? any help would be appreciated for i have hit a wall. Thank you JT

That sounds like the new battery is flat. Put the headlights on, stand in front of the vehicle and get someone to try and start the vehicle. What happens to the headlights.

Or

Did you replace the battery yourself? Is the anti-theft light on steady.

videos
https://www.google.com/search?q=2001+Buick+Lasabre+Custom+will+not+start%2Fcrank

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Starter Voltage Drop

Starter relay ? Transmission range switch ? IS battery voltage getting to the starter solenoid S terminal ?

How to voltage drop test starter motor circuit

Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on starting .

Starter
When the ignition switch is moved to the RUN position, battery voltage is applied to one side of the Crank Relay in the underhood accessory wiring junction block through circuit 3, the PCM-BCM Fuse in the fuse block, and circuit 439. When the ignition switch is turned to START, voltage is fed to the powertrain control module connector C2 terminal 23 through circuit 5, the CRANK SIGNAL Fuse in the fuse block, and circuit 806 through the underhood accessory wiring junction block. Power is always provided from the CRANK MaxiFuse in the underhood accessory wiring junction block to the common side of the Crank Relay contacts. When the powertrain control module sees the crank signal and determines that conditions are OK for a crank, it supplies ground through circuit 625 to the Crank Relay. The Crank Relay now has both power and ground to the relay coil, causing the relay to pull in. When this happens, and the gear selector is in either PARK or NEUTRAL, the power at the relay common contact is passed through the normally open contact , circuit 1737, the transaxle range switch and circuit 6 to the S terminal on the starter solenoid.

Use the wiring diagram to trace power from the battery.
it can be the ignition switch, security system, neutral safety switch, relay, or wiring.

if you have battery power on the large terminal at the starter and the same on the smaller wire when someone Is turning the key to start and the starter has a good ground then the starter is bad drawing too much amperage causing the clicking sound.

Better check with a test light for power to the small wire that goes to the starter from the key switch. If no power need to check for a neutral safety switch or fuse. Or the starter you got is bad. Alternator will not cause not to crank over

If the ignition switch is good and you are certain it works fine,did you realize there is a TSB for this condition when ever you replace a infiniti starter or even some Nissan you are supposed to replace the starter relay also,but it goes further than that you also need to rplace the Throttle control relay with the starter relay.

About the only thing you didn't mention was the starter itself. You could have it tested. But before that, try to see if you have power on the small wire to starter solenoid on the starter, when key is held in cranking position. Pull the small wire off and check for power with a multimeter or a testlight while someone holds the key in crank. This is the signal wire from ignition switch that closes the elec. contacts inside solenoid so the starter gets full power from the battery to spin. (This wire also is in the circuit with the clutch switch and the starter relay.) If you have power on this wire in crank, it is very likely the starter is bad. If there is no power, check that circuit out. It is losing power somewhere from switch to starter solenoid. Good luck.

If it just clicks make sure the engine isn't locked up by turning it by hand. If it turns freely it is possible that you have a defective starter motor provided all your connections to the starter and battery are clean and making good contact.

Hello! Do you hear a click when the key is turned?...If no click is heard either the ignition key, the Crank relay, the starter, or the battery are suspect...Having lights and radio does not mean the battery is capable of running a starter motor......Put a meter on the battery...should read 12.5 volts...Turn key...Does voltage drop to 8 or 9 volts? Bad battery...If all is well with battery and connections to it...Check the starter fuse # 33 in the under hood fuse/relay box...If the fuse is good that click you should hear is from the Crank Relay in that box...If all of the above is OK connect your meter to the Purple wire that is connected to the starter motor...When the key is turned 12 volts must be on that wire...If there is the starter motor is defective...So, #1...Do you hear a click when key is turned...That would point at a bad starter or weak battery...#2...If you do not hear a click bad fuse #33, bad Crank Relay, bad ignition switch...#3...If fuse is good Bad Crank Relay or Ignition switch; Crank Relay is a low cost item ($10)...Replace Relay...Stop there and send a comment as to results...Guru...saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

It's on the bottom left side of the engine at the fglywheel. It is round and about a foot long. Follow the large red power wire down to it.