The 83buick lesabre just got a tune up. I don't have my alternator hooked up to the battery. I had to buy another connector for it. Would that make it not crank. Or just recheck my tune up

1ST make sure the oil level is up to spec. make sure all connections are connected & either charge the battery or boost the battery. If a boost doesn't do the trick, try leaving the booster cables hooked up with the other car running for a few minutes & try starting again. Try that battery charge next. If no luck, u may need a batt, Have a battery voltage test done / load test & starter draw test when fully charged. If u get it running have the alternator checked & ckd for shorts. Good Luck

When disconnecting your battery you need to hook up an alternative power supply . Vehicles with the electronics there have now a days . Something's need to be relearned an some of the modules may not wake back up at all , unless hooked up to a factory scan tool . Battery Disconnect or Replacement Problems

CHECK ALTERNATOR FUSE AND FUSE LINK ALTERNATOR NOT GETTING NO POWER FROM BATTERY.ALSO CHECK ALTERNATOR WIRES CONNECTORS FOR DAMAGE OR BROKE WIRES IN THE ALTERNATOR ELECTRICAL CONNECTORS. I HAD SAME PROBLEM WITH CHEVROLET THE VOLTAGE REGULATOR WIRES CAME OUT THE CONNECTOR I HAD TO BUY NEW CONNECTOR CRIMP IT SOLDER THEN SEAL IT WITH ELECTRICAL TAPE IF FUSE AND FUSE LINK OKAY MORE LIKELY YOU HAVE DAMAGED WIRES AT CONNECTOR MAKE SURE DRIVE BELT TIGHT AND NOT SLIPPING.

Hook a digitalmeter to the battery in your driveway while the car is running. It should read 13.5vdc. If it doesn't, something is pulling it down. We can start there. Looking forward to hearing from you again.

Check the charging system, clean the terminals.

if it clicks more than likely a jump start will get it going and unless the headlights or other power is left on you might need a battery or alternator also the car is new enogh it will need a direct 12 volt power source for the pcm so if you un-hook the jumper cables and it dies it definetly needs a battery hope this helps

There are 2 wire connectors in black tubing. Make sure to disconnect the battery 1st. The one is a connector with a pry up tab. The other is a red wire that is bolted on 12mm i think socket only.
The other thing that looks like an alternator but isn't is the a/c pump with hoses!!
The alternator is near the firewall cab the ac is nearer the radiator.

use a volt meter while the car is running to check the main wire or large red wire coming off the back of the alternator it should read a steady 14 volts, the volt meter must be set at dc 10 amp settings, ground the black wire to ground or a metal surface some where on the car and touch the red probe wire on the volt meter to the main terminal of the alternator as i said it should read a constant 14 volts if it doesn't the alternator is bad.

Sounds like you have a bad alternator. but first , check the battery connection o the positive side where the cables overlap eachother. they like to corrode in between the two cables and do just what your saying. but it really sounds like you need an alternator. have someone check the red wire on the back of the alternator and see if there is power there al the time- should be. if so replace the alternator, i have had many new or not vary old one fail. - good luck

try hooking battery to horn to test if it works in the first place and if it does check the relay.