The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Gremlins? Odd electrical failures, connected or coincidence?

**VetteVet** · 01-11-2018, 01:55 AM

Well it sounds like your alternator is failing, but there may be other causes as well.
You need to start with the basics and clean all your connections, starting with the battery terminals and cables at both ends, and check the grounds on the ends of the negative cable. Then check the headlight grounds on the right headlight. Does both the low and high beam fail to light or just the low beam your bulb may just be blown.

The truck battery could be going bad or the alternator isn't keeping it charged. If you can check the large output wire on the back with a multi-meter, set to DC voltage, you should get between 13 and 15 volts at idle.

01-11-2018, 01:55 AM	#2
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,703	Re: Gremlins? Odd electrical failures, connected or coincidence? Well it sounds like your alternator is failing, but there may be other causes as well. You need to start with the basics and clean all your connections, starting with the battery terminals and cables at both ends, and check the grounds on the ends of the negative cable. Then check the headlight grounds on the right headlight. Does both the low and high beam fail to light or just the low beam your bulb may just be blown. The truck battery could be going bad or the alternator isn't keeping it charged. If you can check the large output wire on the back with a multi-meter, set to DC voltage, you should get between 13 and 15 volts at idle. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.