: voltage question

07-04-13, 05:17 PM
dashboard info shows 13.5 volts while driving but quickly drops to around 12 at idle

07-04-13, 06:41 PM
No good.

DIC should show 14.2 - 14.6 at speed, maybe 13.8 stopped with loads on.

Cables; how old is the battery ?? (Any more that 6 years old, the battery is suspect, as is the voltage regulator - inside the alternator)

Battery voltage chart - battery completely disconnected and left to sit for at least 1/2 hour.

07-05-13, 03:35 AM
My alternator did this before it died. If you have a healthy battery, it might be on its last legs, especially considering age and mileage of these vehicles.

07-17-13, 09:51 AM
Yes i agree with maeng9981, i Drove jake 97 eldo, and he had an aftermarket alternator, and if you didnt shoot the rpms to 5000 as soon as you fired it up it wouldnt charge at all! even driving on the highway all of a sudden everything gets dim check your voltage and was about 12.1, throw it in neutral and shoot it to 5000 again and you were good to go for a little while, if you can spare the extra money get a Factory Replacement! its worth every penny seeing as it is about a 1-2 hour job for a novice northstar mechanic.

07-18-13, 05:42 PM
Also check the main "hot" connection at the alternator