67 Electrical problem
Thread Starter
Instructor
Joined: Aug 2005
Posts: 119
Likes: 0
From: Woodbridge Ontario
67 Electrical problem
I have replaced the battery, I have replaced the old voltage regulator with a new electronic Wells VR715, I have also replace the dash wiring harness and still every time I start the car the ameter shows in the middle. Soon as I turn on the lights it drops to close to -20. As I push in the cigarette lighter it drops to -10.
What else can I possibly look at thats causing the drop.
Any info would be greatly appreciated.
Cheers
What else can I possibly look at thats causing the drop.
Any info would be greatly appreciated.
Cheers
Le Mans Master
Joined: Dec 2007
Posts: 8,000
Likes: 659
From: Puget Sound
Why would you say that? It's obvious that the battery isn't being charged, either because of a bad alt. or a wiring issue since the V/R has been ruled out. With just the motor running and no accessories on, the needle should be close to the middle. It takes very little amps to run the ignition.Jim
Team Owner
Joined: Feb 2003
Posts: 54,121
Likes: 9,429
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Why would you say that? It's obvious that the battery isn't being charged, either because of a bad alt. or a wiring issue since the V/R has been ruled out. With just the motor running and no accessories on, the needle should be close to the middle. It takes very little amps to run the ignition.Jim
Le Mans Master
Joined: Aug 2005
Posts: 6,541
Likes: 1,975
From: Temple Terrace Florida
Charging
Put a multimeter on the battery. It should read 12.25 to12.75 volts before you start. Start the engine and measure the voltage at the alt. It should read 14.5 to 14.75 volts at the alt. With the engine running, check the voltage at the battery. It should measure a drop of about .5 volts at the battery. If all of this is within specs, all should be well. If you have a 37 amp. alt and you put on the lights and cig. lighter, the reading you mentioned are normal. Jerry
Le Mans Master
Joined: Dec 2007
Posts: 8,000
Likes: 659
From: Puget Sound
Jim
