Oh No! another headlight question!
Thread Starter
Cruising
Joined: Aug 2010
Posts: 11
Likes: 0
From: Fort Campbell KY
Oh No! another headlight question!
It's not that bad 
, Thanks to all the great information provided by the members here i was able to trouble shoot my headlight issue. I was wondering if i can get confirmation on my diagnosis.
Situation: 1982 C3, new actuators (well they where replaced in 2010 during an under the hood restore), valves, and whatnot.
Issue: Driver side headlight will attempt to raise when either bypassed or lights turned on, but will not fully extend.
Steps taken: Followed the troubleshooting guide, checked all lines and ensured the underside of the light assembly was not binding on loose wires or just dirty. When vacuum is applied to the green line, the light will attempt to raise and maintains pressure to a certain point. At the point in question the vacuum is lost and air free flows through the line.
Tested with vacuum pump and by applying manual vacuum (Yes I put the hose in my mouth and drew the air out.) By manual means there is resistance until a certain point and i loose all vacuum. No amount of sucking will raise the lamp. (unlike a cat running into a sliding glass door i can see the jokes coming
)
Diagnosis: I believe it to be a headlight actuator rod seal shown here. Is my theory on track with what the trouble shooting indicates? Thanks in advance for your advice.
, Thanks to all the great information provided by the members here i was able to trouble shoot my headlight issue. I was wondering if i can get confirmation on my diagnosis.Situation: 1982 C3, new actuators (well they where replaced in 2010 during an under the hood restore), valves, and whatnot.
Issue: Driver side headlight will attempt to raise when either bypassed or lights turned on, but will not fully extend.
Steps taken: Followed the troubleshooting guide, checked all lines and ensured the underside of the light assembly was not binding on loose wires or just dirty. When vacuum is applied to the green line, the light will attempt to raise and maintains pressure to a certain point. At the point in question the vacuum is lost and air free flows through the line.
Tested with vacuum pump and by applying manual vacuum (Yes I put the hose in my mouth and drew the air out.) By manual means there is resistance until a certain point and i loose all vacuum. No amount of sucking will raise the lamp. (unlike a cat running into a sliding glass door i can see the jokes coming
)Diagnosis: I believe it to be a headlight actuator rod seal shown here. Is my theory on track with what the trouble shooting indicates? Thanks in advance for your advice.
Melting Slicks
Joined: Mar 2007
Posts: 2,520
Likes: 11
From: Hinckley OH
Is the passenger side working? Mine was doing that on the driver's side and the passenger side wasn't working at all. I plugged the passenger side at the vacuum tank and the driver's side works. I haven't found the problem on the passenger side yet because I haven't had time to investigate further.
Thread Starter
Cruising
Joined: Aug 2010
Posts: 11
Likes: 0
From: Fort Campbell KY
Thanks for the input, its greatly appreciated.
