70 Cutlass Headlights - All 4 high/low wiring

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Old March 31st, 2024, 08:36 AM
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70 Cutlass Headlights - All 4 high/low wiring

Has anyone modified and wired their headlights to where all four switch back and forth between high and low? Basically dual filament in all of them or LED/HID duals? If so, how did you wind up wiring it?
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Old March 31st, 2024, 08:45 AM
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Why would you want two low beams on each side?
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Old March 31st, 2024, 11:19 AM
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Originally Posted by Fun71
Why would you want two low beams on each side?
Adjust the beams for more light. 4 lights always on instead of two.
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Old March 31st, 2024, 02:17 PM
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You'll have to change the buckets and the connectors for the hi beams.
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Old March 31st, 2024, 05:23 PM
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Yeah, just use low beam parts in the high beam location. Easy peasy.
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Old March 31st, 2024, 05:33 PM
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Originally Posted by Fun71
Yeah, just use low beam parts in the high beam location. Easy peasy.
I'm talking about making all four lights aftermarket dual filament and having them all swap back and forth. So basically I'll have all low beams, hit the foot switch and then have all high beams.
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Old March 31st, 2024, 05:37 PM
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Yes, I completely understand. As oldcutlass and I posted, using low beam bulbs and wiring in the high beam positions will do that.
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Old March 31st, 2024, 09:16 PM
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Originally Posted by Fun71
Yes, I completely understand. As oldcutlass and I posted, using low beam bulbs and wiring in the high beam positions will do that.
Ok, just making sure. That isn't going to overload the relay or anything?
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Old April 1st, 2024, 05:42 AM
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Originally Posted by GvEmHellBama
Ok, just making sure. That isn't going to overload the relay or anything?
There is no relay. The headlights are hardwired to the switch, which contacts sizes to carry the current of the OEM headlights. Changes in current draw can overheat the switch.
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Old April 1st, 2024, 05:54 AM
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Since the switch already powers 4 hi beam filaments, I doubt that's an issue.
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Old April 2nd, 2024, 12:13 PM
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Originally Posted by joe_padavano
There is no relay. The headlights are hardwired to the switch, which contacts sizes to carry the current of the OEM headlights. Changes in current draw can overheat the switch.
Gotcha. I obviously need to get on AllData at work and print off a schematic lol

Originally Posted by oldcutlass
Since the switch already powers 4 hi beam filaments, I doubt that's an issue.
Especially if I swap to LEDs that won't draw the amps that halogen do.

Aighty, thanks guys!
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Old April 2nd, 2024, 06:52 PM
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If you manage to pull it off you are going to become a cop magnet.
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Old April 3rd, 2024, 12:49 PM
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Originally Posted by Supernice88
If you manage to pull it off you are going to become a cop magnet.
It's Alabama. They're not as strict as other states.


I drove my XJ like this for 6 weeks and never even got pulled over if that tells you anything.


Last edited by GvEmHellBama; April 3rd, 2024 at 12:53 PM.
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Old April 3rd, 2024, 07:28 PM
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Originally Posted by GvEmHellBama
Has anyone modified and wired their headlights to where all four switch back and forth between high and low? Basically dual filament in all of them or LED/HID duals? If so, how did you wind up wiring it?
I have done that, Run 2 relays, 1 for low, 1 for high beams, use original wiring to switch them on.
No issues with cops, it's not like you are blinding oncoming traffic.
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