Lightbar wiring to EXT 1

[cdsvt]

Since Ext 1 is a 10 amp circuit, and the lightbar I am installing draws 6.4 amps, is it reasonable to think that I can wire direct to the positive side of my lightbar from the Ext 1 lead in the engine bay, then wire the negative lead to a suitable chassis ground and I'll be good to go? This seems a lot simpler than having relays in the mix. It makes logical sense to me, but I'm afraid I'm not thinking of something.

 

[TheDocAUS]

No reason why you cannot do that. Just enure the max draw AND the constant draw do not exceed 10 amps. That info should be in the specs for the lightbar.

A good rule of thumb is to run the circuit below 80% of capacity and 6.4 amps is below 80%. That way you have some overhead if there is a variation in the draw. The IG uses good quality fuses. Just make sure you have some spares.

Wire ends in the Grenadier and QM (covering standard and high power aux power panels)

Mar 23, 2025

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[cdsvt]

Thank you.

They only publish amp draw, not broken down into max and constant.

I have the 5 Watt/Osram 100w in the table below.

Also, I apologize it is 6.7 amp draw, not 6.4 amp draw.

 

[TheDocAUS]

6.7amps is still fine.

 

[cdsvt]

Thank you!