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Hi Maureen,here's a guide on how to replace the alternator,here's what it look's like.If you are replacing,take to auto part store and match up,If you need to check,autozone will do it for free,just drive there if you can.
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You either have a lose connection or the alternater is not working. If you start the truck and then disconnect the battery and the truck stops running then the alternater is no good.
There might be a short between the alternater and ground. Check wiring Disconnect battery and alternater wiring from the back of the alternater and with a multimeter check for continuity between the BAT stud on the back and the alternater housing.There shouldn't be any.
If the alternater light has come on in the car that means that the alternater is bad and you need to replace. You can also have it checked at your local auto parts store if you would like.
WORKING FROM THE FRONT; YOU NEED A SIZE 17 SOCKET ON A TBAR.THE
ALTERNATER IS ON DRIVER SIDE AT THE BACK.THERE ARE THREE BOLTS TO
LOOSEN (DONT TAKE THEM RIGHT OFF) . PULL THE ALTERNATER TOWARDS THE
FRONT OF THE CAR, SLIP BELT OVER CRANK PULLEY THEN OVER ALTERNATER
PULLEY .LEVER ALTERNATER BACK TO TIGHTEN BELT,THEN RETIGHTEN 3 BOLTS
From the top of the car remove the slide and anchor bolt from the alternater bracket. remove your 3 or 4 pin plug and diconnect the pos power line beside the 3 or 4 pin plug ( on the back of the alternater). now raise the car and from below remove the lower bolt that allows the alternater to swing back and forth. the bolt fits through the housing of the alternater. remove the belt. now the alternater is free. this lower bolt that was just removed attaches to a bracket bolted to the block. remove this bracket and the alternater will slide out of the bottom of the car. complete the above steps in reverse to install new part.
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