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Old September 13th, 2017, 11:53
the_mechanic the_mechanic is offline
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Wiring Multiple Relays to Lights

I am working on wiring up a few center console switches to some lights on the front and rear of my '95 XJ. My plan is for the ones on the rear to be triggered by both the back-up light circuit, as well as a toggle switch in the center console. I will be using two relays wired like shown in the picture here (try not to judge my diagramming skills too harshly lol): https://www.dropbox.com/s/uxf15p37nn...elays.JPG?dl=0.

Based on my understanding of relays, it should not matter if one relay is getting power when inactive (i.e. lights active by toggle switch while B/U light circuit is not active). I am not very confident in my electrical prowess so I am hoping someone can confirm or deny my assumption here.

I am also looking to make one of the switches in the console turn on all of my lights as a "Zombie Lights" option. No reason for this, just for fun and to fill the extra switch hole lol Does anyone have some insight on how to best handle that? My original thought was an extra relay which goes to all lights but I feel like I might get some cross-feeding if I go that route.
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Aaron V.
The fleet: 1995 Jeep XJ 4.0/5-spd, 1970 Ford F100 302/C4, 1970 Ford F100 360/4-spd 1979 Chevrolet C30 Ramp Truck 454/TH-400, 1948 Chevrolet 3800 216/4-spd, 2004 Honda Shadow 1100
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Old September 13th, 2017, 11:54
the_mechanic the_mechanic is offline
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Re: Wiring Multiple Relays to Lights

Worth noting: inputs from the battery will definitely be fused.
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Aaron V.
The fleet: 1995 Jeep XJ 4.0/5-spd, 1970 Ford F100 302/C4, 1970 Ford F100 360/4-spd 1979 Chevrolet C30 Ramp Truck 454/TH-400, 1948 Chevrolet 3800 216/4-spd, 2004 Honda Shadow 1100
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Old September 13th, 2017, 12:20
N8N_99xj N8N_99xj is offline
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Re: Wiring Multiple Relays to Lights

why not just use one relay and put a diode on the B/U light circuit connection to terminal 86 so that it doesn't get backfed by the toggle switch?

I'm assuming these lights will be down low? If they're on a roof basket or something I'm guessing you might get some disapproving looks from the local authorities.
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Old September 13th, 2017, 12:27
the_mechanic the_mechanic is offline
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Re: Wiring Multiple Relays to Lights

Quote:
Originally Posted by N8N_99xj View Post
why not just use one relay and put a diode on the B/U light circuit connection to terminal 86 so that it doesn't get backfed by the toggle switch?

I'm assuming these lights will be down low? If they're on a roof basket or something I'm guessing you might get some disapproving looks from the local authorities.
I was going to try to avoid putting in diodes for simplicity's sake (in my mind).
But...as I am looking at this more and looking at the "Zombie Lights" wiring, the diodes may be simpler after all.

Yeah, they are mounted on the rear bumper.
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Aaron V.
The fleet: 1995 Jeep XJ 4.0/5-spd, 1970 Ford F100 302/C4, 1970 Ford F100 360/4-spd 1979 Chevrolet C30 Ramp Truck 454/TH-400, 1948 Chevrolet 3800 216/4-spd, 2004 Honda Shadow 1100
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Old September 13th, 2017, 13:20
lawagoneer lawagoneer is offline
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Re: Wiring Multiple Relays to Lights

Diodes are much simpler than a military relay circuit.
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