66 chevy headlight problem?

[joe1966]

My 1966 chevy c10 2wd has some weird headlight problem. When i turn the light switch on i barely have headlights. like the left one is decent but the right is like a flickering orange glow :/ I went and changed the bulbs with new ones thinkin that would work but still it is the same. I unplugged the main light plug and cleaned it reallly really good. and plugged it back in and still the same, I also took off the grill off to rewire it all and im still having the same problem? what could it be? and clicking the high-beam switch it had no affect on the right and very little on the left. wonder what it could be?

[oakstcustomz]

The headlight switch powers the headlights so make sure the
Red wire at switch has 12 volts atleast..... If so the blue wire
goes to the high beam selector see if it has 12.... Could be a bad
switch or headlight high beam switch but double check grounds
At headlights! Must be clean and paint free!
Posted via Mobile Device

[yelmer]

The switch sometimes sticks pull out and push down on the handle sometimes it makes a better connection.

[luvbowties]

Originally Posted by joe1966

My 1966 chevy c10 2wd has some weird headlight problem. When i turn the light switch on i barely have headlights. like the left one is decent but the right is like a flickering orange glow :/ I went and changed the bulbs with new ones thinkin that would work but still it is the same. I unplugged the main light plug and cleaned it reallly really good. and plugged it back in and still the same, I also took off the grill off to rewire it all and im still having the same problem? what could it be? and clicking the high-beam switch it had no affect on the right and very little on the left. wonder what it could be?

We've run into this several times in our garage PLUS I've seen it online numerous times: GROUND! GROUND! GROUND! You can check quickly if this is your problem and then go from there. Run a temporary ground from ground terminal going to your bulb (We do testing on passenger-side bulb since it's closer to battery.) to the negative terminal on your battery----use a good-size wire, like a 10-gauge or 12-gauge, just for testing. If you need to know which is ground-terminal, Google is your friend. If lights are noticeably brighter, then run good grounds to your bulbs. While there, you can also easily check proper terminals for adequate voltage(should be MINIMUM of 12 volts--better if greater).
HTH,
sam

*Here is a good site for wiring checks, and is more widely applicable than its "titles" may indicate...Scroll to bottom of page to look for your particular issue.
>> http://www.6066gmcguy.org/ <<

[kieth]

After fixing the grounds, do yourself a favor and install a pair if relays....will make a world of difference....search for headlight relays......Kieth

ps I soldered a ground wire to every light housing on my truck and then installed grounding blocks to the frame . no more chasing grounds and all lights are brighter..

[sigshooter]

Ground is the problem..... Our trucks only had a single wire coming off the battery cable to the core support that supplied ground to the body. Think about it.... the engine is mounted with rubber mounts, the body has rubber mounts to the frame, etc.

Later in 1966 they started adding ground straps from the engine to the firewall, but people took these off and threw them away when the did repairs.

I found these on 95-96 explorers and added them to my truck since they just slip on. I added them everywhere, grounded cab to frame, bed to frame, core support to frame..... ALL my lights are brighter including dash lights, and the amp meter is more stable doesn't bounce around as much.