[Myblue1968]

Today I ran into a problem and wanted some ideas. I have a 68 chevelle and replaced plug wires today then decided and needed to work on alternator bracket to align the belt better. So I disconnected battery removed alternator from bracket not removing the wiring . when all done connected battery started car warm up a little and everything looked good. Noticed the headlights on and drivers side marker light loop and all other marker and taillights off. The passenger side both lights are on but really dim . The driver side has just low beam on and looks normal. I disconnected headlight switch and lights are still on all of the time. Any ideas of were to start would be great

 

[Peewee0413]

Today I ran into a problem and wanted some ideas. I have a 68 chevelle and replaced plug wires today then decided and needed to work on alternator bracket to align the belt better. So I disconnected battery removed alternator from bracket not removing the wiring . when all done connected battery started car warm up a little and everything looked good. Noticed the headlights on and drivers side marker light loop and all other marker and taillights off. The passenger side both lights are on but really dim . The driver side has just low beam on and looks normal. I disconnected headlight switch and lights are still on all of the time. Any ideas of were to start would be great

Well the constantly on and didn't touch any wire seems strange..

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[69SS454]

Not exacty clear on your problem but anytime you are having lighting problems it is usually a grounding problem. Does your negative battery cable connect to the alternator bracket or the engine? Do you have ground straps from the engine to the firewall and from the battery to the fender?

 

[LowRider67]

Today I ran into a problem and wanted some ideas. I have a 68 chevelle and replaced plug wires today then decided and needed to work on alternator bracket to align the belt better. So I disconnected battery removed alternator from bracket not removing the wiring . when all done connected battery started car warm up a little and everything looked good. Noticed the headlights on and drivers side marker light loop and all other marker and taillights off. The passenger side both lights are on but really dim . The driver side has just low beam on and looks normal. I disconnected headlight switch and lights are still on all of the time. Any ideas of were to start would be great

Lol…sounds like me, every time I try to upgrade or tweek something, something else goes out. Most likely a ground wire, is you amp gauge reading good output?

 

[blm]

Sounds like a grounding issue.

 

[aztec66]

Check the bulkhead connector, you may have wiggled it loose changing plugs or by pulling on the alternator harness. Happened to me and gave me weird issues with the headlights

 

[Myblue1968]

Well it fixed it's self . I was checking grounds and remembered the plastic cover for windshield wiper had fallen off when installing new plug wires so I started checking wires in that area and lights turned off. I tried to get the problem to happen again and couldn't. I checked everything in that area but found nothing. I forgot to add I removed ground on alternator bracket so I will double check it and ground from block to firewall and one other. Tomorrow I am gonna double check my grounds.