09-08-2020, 09:51 PM | #1 |
Senior Member
Join Date: May 2004
Location: Chandler, AZ
Posts: 508
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Need a Relay?
Got a pair of off road lights, LED 25 watts each. The switch is 12V 20 amp. Do I need a relay on that?
Thanks.
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69 C-10 LWB, 350, 700r4, 3.73 posi-traction, front disc brakes. Built for the desert- She can take the heat! Vivat Rex Chevus! |
09-08-2020, 10:14 PM | #2 |
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Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,513
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Re: Need a Relay?
25 watts at 12V is about 2 amps.
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09-08-2020, 10:21 PM | #3 |
Senior Member
Join Date: May 2004
Location: Chandler, AZ
Posts: 508
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Re: Need a Relay?
About 4 amps for the whole shebang so I'm thinking no unless voltage drop is a big deal?
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69 C-10 LWB, 350, 700r4, 3.73 posi-traction, front disc brakes. Built for the desert- She can take the heat! Vivat Rex Chevus! |
09-08-2020, 10:25 PM | #4 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,513
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Re: Need a Relay?
Yes, I agree.
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09-08-2020, 11:13 PM | #5 |
Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,461
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Re: Need a Relay?
The switch should handle the current of the 2 LEDs just fine. The only reason for a relay in this case would be to avoid any voltage drop that might already exist in the stock cab wiring. I would try without a relay and if the results are good, call it a done project.
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