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Room circuit short with low amperage

Old 12-29-18, 06:33 PM
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Room circuit short with low amperage

Having an issue with the room fuse circuit (already searched through existing threads) where the fuse blows the instant it is placed into the joint box.
When I probe the jointbox with a multimeter it shows an average draw of 0.354 A which makes no sense especially since the room circuit is 10A.
I went through wiring diagram and disconnected everything on the circuit one by one to see of there was any change in amperage but no luck and everything I tested has continuity (measured by grounding the neg terminal of a multimeter and using a n alligator clip and long primary wire on the positive terminal of the multimeter to test each item on the circuit)

Engine is running ok but things like the dome lights, hatch lights, radio and trip computer dont work.

anyone deal with something similar?
The big thing that doesnt make sense is that it's only pulling less than 1/2 A draw yet still blowing the instant it is replaced
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Old 12-30-18, 08:29 AM
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Fuses can blow due to too much load or a short to ground. Most likely you have something shorting out.

Typically the problem lies wherever there are aftermarket electronics wired in. The factory harness rarely has a problem unless the harness is damaged somewhere and rubbing against the frame and shorting to ground.

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