#1  
Old 01-13-2022, 11:54 PM
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81TATurbo 81TATurbo is offline
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Default Headlights not working

So I just did an engine swap on a 1981 Formula Turbo. The turbo motor has been gone for a while and I was running a mild 400. I just put in a Butler stroker. After the install I have no headlights. Not only that but my power aerial won't go up. Stereo comes on but no aerial. The only things that I've changed on this install is the installation of an MSD box and I deleted all the air conditioning unit. The lights worked fine before. Honestly the wiring is a bit of a mess and needs to be cleaned up as all the old wiring for the turbo motor is still there but I'm at a loss of which to keep and which to get rid of. It would be nice to have everything working as it should and also have the firewall cleaned up. Thanks!

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Old 01-14-2022, 01:24 AM
Geoff Geoff is offline
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Probably a missing ground strap[s] from the body work to the block.

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Old 01-14-2022, 02:01 AM
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Do the parking lights and turn signals work? I am not sure how the firebird front harness connector is at the firewall, but maybe it came loose while you were working in there?

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Old 01-14-2022, 02:46 PM
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No parking lights but I do have signal lights, brake lights, and interior lights.

There are 2 ground straps, one that runs from the body (firewall) to the transmission and one that runs from the block to the frame. should the one from the block run to the body?

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Old 01-14-2022, 03:05 PM
rustedgoat rustedgoat is offline
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Check the high beam switch, they can mess things up at anytime.

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  #6  
Old 01-15-2022, 02:30 PM
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I checked the high beam switch and it appears to be fine

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Old 01-16-2022, 10:00 AM
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There is another ground from transmission to frame driver side.

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  #8  
Old 01-16-2022, 12:35 PM
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A good 'ole volt meter and harness pin checking for 12 v while turned on helps pinpointing if there is a voltage supply, and then if it is just a bad connection. I found the fog and headlamp connectors needed a little dielectric grease to improve the connection interface after 40+ years.

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Old 01-16-2022, 01:18 PM
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Bill Hanlon Bill Hanlon is offline
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Quote:
Originally Posted by 81TATurbo View Post
I checked the high beam switch and it appears to be fine
Appears (as in looks OK) or did you actually check for voltage with a meter? Turn on the headlight switch. You should find voltage (12 volts or so) on two of the three posts on the dimmer switch. Click the dimmer one time. Voltage should still be present on one of the posts, missing from one of the posts that had it before and present on the post that didn't have it before.

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  #10  
Old 01-16-2022, 05:50 PM
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Sorry guys. I haven't used a volt meter yet. Its been -34C (-29F) here with wind chill factors and its not much better today. The problems of not having a heated garage is not having the comfort to do some things over the winter months. I was trying to troubleshoot early and get ideas since its bugging me. Now they're calling for hot to 40cm (15+ inches) of snow into tomorrow morning. I greatly appreciate the feedback and will be back on it as soon as temperatures allow. Thank you!

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