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Old 08-29-2017, 05:54 PM
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Non Canbus ignition circuit

I need to find a power supply for my CB in the factory fuse panel under the hood.
I've been told I should not hook any fuse tap accessory to a canbus circuit. Apparently the canbus circuits send signals (in addition to power) over the circuit to/from the computer and any additional accessory could mess this computer communication up.
Is there a non canbus circuit that is only hot when the ignition is on, in the factory fuse panel under the hood (preferable an unused circuit)?
Thank you

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Old 08-29-2017, 06:20 PM   #2
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The fuse for 'rear heated seat' is most likely unused. It is on with the key and off otherwise.

I used that fuse location to control a relay since it will provide a constant voltage. I will not recommend using it to supply power directly to your accessory though. Probably would not be a problem since a CB is low current but it is a lot more than a relay and that way you have all the current you need without drawing power for the device through the CANBUS.

There is a small hole big enough to run a 14 gage wire through the box & out the bottom. Using a fuse tap on the heated seat circuit does not pose a problem.
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Old 08-29-2017, 07:02 PM   #3
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Just use the dash 12v outlet circuit. It's keyed and designed to handle the load.
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Old 08-30-2017, 07:31 AM
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Quote:
Originally Posted by enjerhoo View Post
The fuse for 'rear heated seat' is most likely unused. It is on with the key and off otherwise.

I used that fuse location to control a relay since it will provide a constant voltage. I will not recommend using it to supply power directly to your accessory though. Probably would not be a problem since a CB is low current but it is a lot more than a relay and that way you have all the current you need without drawing power for the device through the CANBUS.

There is a small hole big enough to run a 14 gage wire through the box & out the bottom. Using a fuse tap on the heated seat circuit does not pose a problem.
Thank you.
I'm not sure I understand. You say that you don't recommend the rear seat heater position in the fuse block, but it wouldn't be a problem since the cb draws so little current. Do you know what current this circuit is rated for? The CB is only about 5 watts, so around 1/2 amp - I would probably use a 5 amp fuse.
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Old 08-30-2017, 07:36 AM
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Originally Posted by Tweak View Post
Just use the dash 12v outlet circuit. It's keyed and designed to handle the load.
Thank you

The power point (cigarette lighter) circuit?
I'd like to use a fuse tap into the fuse block under the hood so it's fused and there's no messing with the factory wiring.
My Jeep is in the shop (for another issue), so I can't check the fuse block location of the power point, but I was thinking this location had other things with it, that might be on the canbus?
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Old 08-30-2017, 09:00 AM   #6
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Old 08-30-2017, 10:20 AM
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Thank you Willy!
Are all these locations non Canbus?

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