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First check the belt. If it is loose then tighten it until you have a 1/2 " deflection at dead center. If the belt is frayed or looks bad, replace it. Check the voltage output at the battery posts with a multimeter set to DC voltage in the 20 volt range engine idling. You should get from 13.5 to 16 volts. Any more or less and the alternator is bad.
Later vehicles use a flat belt in place of the v belt. If there is not an auto adjust system, adjust the belt so that just 90o of twist can be achieved in the longest free part of the belt. Before you condemn the alternator check that all the grounding cable connections between the battery and engine/transmission and the body are clean and tight.
What else can I help you with?
How do you replace an alternator belt on a 1987 SAAB 900?
You will need to loosen the alternator belt with the tensioner pulley. When the tensioner pulley is loose the alternator belt will become loose. Put the new alternator belt on and tighten the tensioner pulley.
How do you Change alternator 2004 Malibu?
You need to remove the serpentine belt and unbolt the old alternator. Bolt on the new one and reinstall the belt. Its that easy.
How do you tighten the alternator belt on a gmc suburban?
It should be self adjusting, if it is slipping it could mean you need a new belt or a new belt tensioner.
How do you change the alternator belt on a El Camino?
Loosen the alternator tensioner bolt. The alternator belt will become loose. Remove the alternator belt. Put the new alternator belt on and reverse the process.
How can you find out which alternator you need?
Any auto parts store where you will go to buy a new alternator can tell you what you need.
How do you replace an alternator or vauxhall vectra?
You will need to remove the alternator belt. Remove the wiring harness from the back of the alternator. Remove the alternator retaining bolts. Reverse the process to install your new alternator.
Do you have to readjust the alternator belt after put in a new alternator?
Yes.
How do you change the alternator belt on a Volvo 240 dl?
Begin by removing the alternator tensioner bolt. Slide the alternator to the left. Remove the alternator belt. Reverse the process to install the new alternator belt.
Easiest way to replace alternator belt on a 1994 Toyota 4x4?
Loosen the tensioner bolt on your alternator. Slide the alternator to the left. Remove the alternator belt. Put the new alternator belt on and tighten the tensioner bolt.
How can you tell in need a new alternator for a 1997 Honda civic?
Disconnect the batery cable from the battery while the vehicle is running, if it dies, you need a new alternator there, buddy.
How do you replace the alternator belt for a 1994 eclipse?
The alternator belt on a 1994 Eclipse is replaced by loosening the alternator bolts, moving the alternator downward, and slipping the belt off. A new belt is then routed around the other accessories, placed on the alternator, and the bolts tightened.
Doe the noise that the alternator is making means you need a new alternator?
Possibly and it can be the drive belt making a noise. It you hear a whine it is likely the alternator bearings are shot. You can remove the alternator and have it tested at most auto parts stores, after you make sure the belt is good.
