OBD2 fuse keeps blowing
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1st Gear
Joined: Apr 2023
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OBD2 fuse keeps blowing
Hey all. Have a 99 F250 7.3L using as a work truck. Wanting to plug in a gps device to track the miles through the obd2 port. Not getting power and after doing some digging the fuse was blown. Put a new one in and it pops right away. Unfortunately I don’t have a lot of experience diagnosing electrical problems or tracing shorts. Any input/advice would be greatly appreciated.
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Joined: May 2014
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From: Lake Hartwell, GA
Without looking at a diagram, I am fairly certain the OBDII port shares a fuse with the 12v power port. You could get to the harness/connector behind the power port and disconnect it to see if that changes anything.
First, try to verify this fuse share via the manual or a search on the FTE.
You may have a frayed wire shorting itself under or behind the dash. You could also try to visually inspect the wires from the two areas, but unless you get lucky will likely need a multimeter.
First, try to verify this fuse share via the manual or a search on the FTE.
You may have a frayed wire shorting itself under or behind the dash. You could also try to visually inspect the wires from the two areas, but unless you get lucky will likely need a multimeter.
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