Firebird Headlights will go up but not down Trying to troubleshoot a problem with the headlights. They'll rise up just fine but need to be manually cranked down. After you crank em down they will shoot back up no problem so motors are working etc. Checked the module and no cold solder joints but re-flowed them regardless, and verified the relay is functioning. I read could be the headlight switch, pinned that out and cleaned it. No issues. Then I saw something about a fuse link on the framerail? I found a 20amp bus fuse near the battery (driver side) that's just fine so I'm at a loss. Any ideas? Thanks |
Re: Firebird Headlights will go up but not down Year? There are two different systems, it'd help to know the year of the car. |
Re: Firebird Headlights will go up but not down
Originally Posted by Drew
(Post 6281083)
Year? There are two different systems, it'd help to know the year of the car. |
Re: Firebird Headlights will go up but not down If you look at this handy wiring diagram you will see that when you turn the headlights on the yellow wire gets +12V which triggers the module to open the doors . When you turn the headlights off the white wire gets +12V which triggers the module to close the doors . First make sure both pins "1B" and "1E" have +12V at the module connector . If so then the 64 thousand dollar question is , are you getting +12V on the white wire at the module with the headlight switch in the off position ? If yes , your module is bad . If no , your switch or the wiring connecting the switch to the module is bad .... https://cimg9.ibsrv.net/gimg/www.thi...8dcd4b219e.gif |
Re: Firebird Headlights will go up but not down PS , don't forget that the close command (The white wire) gets it's power from the taillight circuit whereas the open command (yellow wire) gets it's power from the headlight circuit . A blown taillight fuse would cause the doors to not close since there would be no power on the white wire with the headlight switch off . Is your 20 amp taillight fuse ok ? |
Re: Firebird Headlights will go up but not down
Originally Posted by OrangeBird
(Post 6281114)
PS , don't forget that the close command (The white wire) gets it's power from the taillight circuit whereas the open command (yellow wire) gets it's power from the headlight circuit . A blown taillight fuse would cause the doors to not close since there would be no power on the white wire with the headlight switch off . Is your 20 amp taillight fuse ok ? Headlights up and close as they should! Thanks |
Re: Firebird Headlights will go up but not down :goodjob: Your welcome , I'm glad I was able to help you . |
Re: Firebird Headlights will go up but not down :goodjob: |
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