Up fitter switch question
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Senior User
Joined: Dec 2017
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From: Lake Tapps WA
Up fitter switch question
I bought two LED light bars. They are 40 amps each. They each come with a wire harness, relay , and switch. It is meant to hook up directly to the battery. I have other plans for the two 40 amp upfitter switches. So i’m hoping to save them. Any thoughts on utilizing the relay and direct hook up to the battery and one of the 25 amp upfitter switches for each of the light bars?
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Joined: Oct 2015
Posts: 19,694
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From: Wyoming
If you have a relay then any of the low power upfitter switches will work. If you wanted both of the light bars on at the same time then one switch that could do also. The upfitter switch is telling the relay to turn on. The actual power for the light comes directly from the battery, not the switch.
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Senior User
Joined: Dec 2017
Posts: 118
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From: Lake Tapps WA
Alright, I may have spoken too soon. My question should’ve been, how can I use the single powered 25 amp wire from my upfitter switch to power a relayed , fused, battery powered, 40 amp LED light bar?
Hotshot
Joined: Oct 2015
Posts: 19,694
Likes: 12,819
From: Wyoming
Power from the upfitter switch will go into one of the prongs on the relay. The schematic for the relay will tell you which prong to use. I think it is fairly standard so a schematic for another relay that is similar to yours should work, but I would always verify that using the OEM schematic or instructions.
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