Mechanics

PONTIAC MONTANA ALTERNATOR PROBLEM

2003 Pontiac Montana • 111,111 miles

Put new alternator on and it still wont charge. Drains new battery.
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Guest
December 5, 2012.



Did you have the old alternator tested as bad?Also do you have a multimeter to do some testing?

Saturntech9
Dec 5, 2012.
They said it was bad. Do not have multimeter

Tiny
Continentals
Dec 5, 2012.
You need a multi meter so we can trouble shoot the problem.

Saturntech9
Dec 6, 2012.
Now have multimeter

Tiny
Continentals
Dec 8, 2012.
Lets start with the engine idling what is the voltage reading at the battery?

Saturntech9
Dec 9, 2012.
11.90

Tiny
Continentals
Dec 9, 2012.
Alright your not charging there is a red wire going to terminal B+ the one with a nut on there should be battery voltage there at the alternator. Also the orange wire to the D terminal at the alternator should have battery voltage. Let me know what you find?

Saturntech9
Dec 9, 2012.