Maybe grounded internally. Most all lightbars come with an external ground due to the mounting (clamps not bolted)
Those older bars many times had 2 hot leads due to their high current draw. Most of the bulbs are 50 watts, 4 amps per bulb. Many had been modified by the departments or persons that used them. I donated one to the Richmond TX police department BBQ team. My Nephew is a Richmond PD officer I installed a power supply in the bar, it had a power cord exit the bottom and you just plugged it in. If you just want the effect you can replace the bulbs with lower watt bulbs. May require you to remove the lens and check the connections. If you still cannot figure it out, I can arrange a time to look at it. Robert From: BVARC <bvarc-boun...@bvarc.org> On Behalf Of Suggs, Marvin (KTRK-TV) via BVARC Sent: Thursday, January 25, 2024 2:45 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> Cc: Suggs, Marvin (KTRK-TV) <marvin.su...@abc.com> Subject: Re: [BVARC] Fwd: [HoustonScan] Help needed off topic Hi Robert It has 2 red and no black leads. Sent from my iPhone On Jan 25, 2024, at 11:10 AM, Robert Polinski via BVARC <bvarc@bvarc.org <mailto:bvarc@bvarc.org> > wrote: This Message is From an External Sender Caution: Do not click links or open attachments unless you recognize the sender and know the content is safe. I installed many back in the day when all I did was Fire & Police installs. Due note they require upwards to 30 a to power them. Is the pigtail still out the bottom of the bar? If so, how many conductors is it? These bars were ordered with many configurations, Take-down lights alley lights, an such. Most had a ground and each wire controlled each light. Many also had a siren speaker wiring. Robert KD5YVQ From: BVARC <bvarc-boun...@bvarc.org <mailto:bvarc-boun...@bvarc.org> > On Behalf Of Suggs, Marvin (KTRK-TV) via BVARC Sent: Thursday, January 25, 2024 3:26 AM To: BVARC@bvarc.org <mailto:BVARC@bvarc.org> Cc: Suggs, Marvin (KTRK-TV) <marvin.su...@abc.com <mailto:marvin.su...@abc.com> > Subject: [BVARC] Fwd: [HoustonScan] Help needed off topic Sent from my iPhone Begin forwarded message: From: "Suggs, Marvin (KTRK-TV)" <marvin.su...@abc.com <mailto:marvin.su...@abc.com> > Date: January 25, 2024 at 3:24:46 AM CST To: houstons...@groups.io <mailto:houstons...@groups.io> Subject: [HoustonScan] Help needed off topic Reply-To: houstons...@groups.io <mailto:houstons...@groups.io> This Message is From an External Sender Caution: Do not click links or open attachments unless you recognize the sender and know the content is safe. Any idea on how to power up an Aerodynic Light bar? Thanks <image001.jpg> <image002.jpg> <image003.jpg> _._,_._,_ _____ Groups.io Links: You receive all messages sent to this group. View/Reply Online (#5476) <https://urldefense.com/v3/__https:/groups.io/g/HoustonScan/message/5476__;!!Om87Lau1Cg!MybyVkF7M9se85wRqNiKl8DpWFTl-I9trrdDhwei0gokLWVOjMb8SaNeYlCU8J1wmuvxUOvYBJaUE6LdaBKm$> | Reply To Group <mailto:houstons...@groups.io?subject=Re:%20%5BHoustonScan%5D%20Help%20needed%20off%20topic> | Reply To Sender <mailto:marvin.su...@abc.com?subject=Private:%20Re:%20%5BHoustonScan%5D%20Help%20needed%20off%20topic> | Mute This Topic <https://urldefense.com/v3/__https:/groups.io/mt/103950919/1726685__;!!Om87Lau1Cg!MybyVkF7M9se85wRqNiKl8DpWFTl-I9trrdDhwei0gokLWVOjMb8SaNeYlCU8J1wmuvxUOvYBJaUE6fWwg-B$> | New Topic <https://urldefense.com/v3/__https:/groups.io/g/HoustonScan/post__;!!Om87Lau1Cg!MybyVkF7M9se85wRqNiKl8DpWFTl-I9trrdDhwei0gokLWVOjMb8SaNeYlCU8J1wmuvxUOvYBJaUE86WCY7S$> Your Subscription <https://urldefense.com/v3/__https:/groups.io/g/HoustonScan/editsub/1726685__;!!Om87Lau1Cg!MybyVkF7M9se85wRqNiKl8DpWFTl-I9trrdDhwei0gokLWVOjMb8SaNeYlCU8J1wmuvxUOvYBJaUE15gFI2y$> | Contact Group Owner <mailto:houstonscan+ow...@groups.io> | Unsubscribe <https://urldefense.com/v3/__https:/groups.io/g/HoustonScan/leave/3784685/1726685/661395741/xyzzy__;!!Om87Lau1Cg!MybyVkF7M9se85wRqNiKl8DpWFTl-I9trrdDhwei0gokLWVOjMb8SaNeYlCU8J1wmuvxUOvYBJaUExURjPR-$> [marvin.su...@abc.com] _._,_._,_ ________________________________________________ Brazos Valley Amateur Radio Club BVARC mailing list BVARC@bvarc.org <mailto:BVARC@bvarc.org> https://urldefense.com/v3/__http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org__;!!Om87Lau1Cg!KHbq04vY45cq3gr3H1aWdT_Mr0vEztNMlkPVnHYqwnW2LojIJpqFb3YQps5FqUd3DOEEktzVrhfliw$ <https://urldefense.com/v3/__http:/mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org__;!!Om87Lau1Cg!KHbq04vY45cq3gr3H1aWdT_Mr0vEztNMlkPVnHYqwnW2LojIJpqFb3YQps5FqUd3DOEEktzVrhfliw$> Publicly available archives are available here: https://urldefense.com/v3/__https://www.mail-archive.com/bvarc@bvarc.org/__;!!Om87Lau1Cg!KHbq04vY45cq3gr3H1aWdT_Mr0vEztNMlkPVnHYqwnW2LojIJpqFb3YQps5FqUd3DOEEktwSPSFb3Q$ <https://urldefense.com/v3/__https:/www.mail-archive.com/bvarc@bvarc.org/__;!!Om87Lau1Cg!KHbq04vY45cq3gr3H1aWdT_Mr0vEztNMlkPVnHYqwnW2LojIJpqFb3YQps5FqUd3DOEEktwSPSFb3Q$>
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