Beacon setup on a work rig

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Jermu97

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Finland
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Jermu
Truck Year
1989
Truck Model
3/4 ton 4x4 Suburban
Engine Size
6.2l
I've got a couple of beacons and aux lights I'm planning on throwing on my squarebody and wanted to see how the people here have done it! If you've got a wrecker, road work truck or anything of the sort with spinny ambers, I want to see it!
I got the lights for my old gmt400 originally, but never got to installing them. All the same, the following picture is how I planned it and how I intend to install them on my burb:

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Well the center aux's are going to be hella 550's instead of the jumbo 320's pictured, but anyway.
 

Smtty58

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Mass.
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Lyle
Truck Year
1990
Truck Model
R3500 Crewcab
Engine Size
350
When wiring them, take power directly from the battery via a continuous duty solenoid, using heavy gauge wire. Size everything based on the total current draw of the lighting. This allows for a low amp switch inside the cab, while sending full power to the lights. This is how I used to wire tow trucks when lights were all incandescent. Lights will be nice and bright and spin at the proper speed. It's also safer, you won't have overheating wires.
 

Jermu97

Full Access Member
Joined
Oct 5, 2021
Posts
130
Reaction score
322
Location
Finland
First Name
Jermu
Truck Year
1989
Truck Model
3/4 ton 4x4 Suburban
Engine Size
6.2l
When wiring them, take power directly from the battery via a continuous duty solenoid, using heavy gauge wire. Size everything based on the total current draw of the lighting. This allows for a low amp switch inside the cab, while sending full power to the lights. This is how I used to wire tow trucks when lights were all incandescent. Lights will be nice and bright and spin at the proper speed. It's also safer, you won't have overheating wires.
I have separated all the lights of the truck from original, made a relay box and the entire front light loom with appropriate size wires for all. Parking lights, low beams, high beams, aux high beams, and beacons. Everything has its own relay.
Don't have a proper pic of it, but here's an in-progress and a simplified diagram from my thesis regarding the headlights.

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Smtty58

Member
Joined
Mar 19, 2026
Posts
36
Reaction score
41
Location
Mass.
First Name
Lyle
Truck Year
1990
Truck Model
R3500 Crewcab
Engine Size
350
I like your diagram. As long as the relays are rated for the load you should be ok.
 

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