Skip to main content

General Motors' GMT400 platform.

76 Questions View all

Why is the dash gauge only reading 8 volts instead 12 volts?

when driving in town the engine power cuts down. from looking at the dsah gauge it show a third voltage output. how can i fix this problem?

Answer this question I have this problem too

Is this a good question?

Score 0
Add a comment

MacBook Battery Fix Kits

Starting at $69.99

Buy Now

MacBook Battery Fix Kits

Starting at $69.99

Buy Now

1 Answer

Most Helpful Answer

earlefelkins.effe  that osund slike you have a bad alternator. Try places like Autozone and others that offer a free scan. Let us know what it shows and what your alternator puts out. Or you can check it with a voltmeter. Set meter to 50V DC. Connect black probe to ground and hold red probe to B+ (usually where the heavy thick cable connects to on your alternator. Now, be very carefulsince you do have to run the engine. Do not stand in the way of the belt etc. Stand aside. You should get around 14~14.5 V on that.

Was this answer helpful?

Score 2
Add a comment

Add your answer

earlefelkins.effe will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 1

All Time: 14