 electrical gremlin help please, headlights playing opposites |
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| iankarr |
 Jun 12 2021, 12:47 PM
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#1
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The wrencher formerly known as Cuddy_K  Group: Members Posts: 2,480 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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Hi guys,
Finally running some power to the bumblebee and happy that almost everything is working as it should (turn signals, brakes, hazard lights, gas tank idiot light, etc). But the headlights are posessed... – Headlight motors go down when stalk is pulled out, and up when pushed in (verified wiring is correct at switch and headlight motors). – Headlights don't come on in either position (neither hi nor low beams – Instrument lights don't come on – Left turn tail light comes on solid – Brake lights light Using a new switch (old switch behaved the same). I've been checking my prospero's wiring diagram and all looks well. Thinking it must be a relay, but I'm scratching my head. Any ideas? Thanks! |
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Replies(1 - 8)
| Shivers |
Jun 12 2021, 02:03 PM
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#2
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Senior Member Group: Members Posts: 2,410 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Wild shot in the dark...Were the headlamp motors removed and re-installed. On my 72 the wires come out of the top. If yours come out of the bottom it may have put things backwards mechanically.
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| iankarr |
Jun 12 2021, 02:31 PM
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#3
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,480 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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Thanks for the suggestion. I wish it were that easy. Pics below. Motors are in proper orientation and wires are color-to-color. I also bench tested the up/down action of these motors with jumpers before installing in the car...and after. It's also the fact that the lights won't turn on that's causing me to scratch my head. FYI...these are LED headlights. The car is wired for foglights, but they're not in yet. Could there be some sort of grounding needed through the fog light circuit which requires the lights to be installed before everything works?
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| iankarr |
Jun 12 2021, 03:47 PM
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#4
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,480 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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Alright, making a little progress. The headlights now turn on when the stalk is pulled (and key turned), but they're facing down in their buckets. The rear side marker lights work on both sides. So all that's left is why up is down and down is up on the headlight motors. When i swap the gray and green/black wires on the switch, the headlights pop up and down continuously. I suppose I could always swap the leads at the motors, but that's cheating (IMG:style_emoticons/default/wink.gif). Is it possible I just aligned the pivot rods inversely when doing the install? Any other suggestions?
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| Shivers |
Jun 12 2021, 04:29 PM
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#5
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Senior Member Group: Members Posts: 2,410 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Behind the plastic guard at the headlight motor there is adjustment on the arm. Maybe you can adjust it open. pull the relay at the light, so it doesn't do anything weird while you are working
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| windforfun |
Jun 12 2021, 04:57 PM
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#6
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Senior Member Group: Members Posts: 1,823 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
Watch your fingers. The headlight motors have a mind of their own. BTDT.
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| 914e |
Jun 13 2021, 05:47 AM
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#7
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Member Group: Members Posts: 496 Joined: 21-February 20 From: Arizona Member No.: 23,951 Region Association: Southwest Region
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Normally I would point you this guy's Ian's videos I guess that won't work. The motors are going up and down correct? If not you should have power at pin 87 of the relays, the headlight switch sends power to pin 85 of the relay through the rotating contacts of the motor do you get power there?
If the heads lights go up and down just out of sync, if remember right just get the headlights in the up position, then loosen the nut on the motor shaft with an open end wrench so that it can rotate in the linkage arm. Turn the headlights on so the motor rotates to the up position then tighten the nut back down. The headlights should be in sync with the motor again |
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| ClayPerrine |
Jun 13 2021, 10:09 AM
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#8
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Life's been good to me so far..... Group: Admin Posts: 15,503 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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| 914e |
Jun 17 2021, 09:11 PM
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#9
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Member Group: Members Posts: 496 Joined: 21-February 20 From: Arizona Member No.: 23,951 Region Association: Southwest Region
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Did you get it figured out?
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