jebiruph
Well-Known Member
- Thread starter
- #1
I was looking at the fuse descriptions on the underside of the PDC cover and saw this - F42 PCR CTRL FEED (ESS)*. Removing this fuse defeats the cold start aux battery test and allows the aux battery to be disconnected without generating any errors.
Unplugging the PCR has always been an alternative to using an N1 N2 fused jumper, both methods defeat the aux battery pass/fail test that occurs prior to a cold start. Unlike using a jumper, unplugging the PCR doesn't require any additional parts, it's just not easy to get to the PCR plug. Removing the F42 fuse accomplishes the same thing as unplugging the PCR, both actions prevent the PCR from activating and separating the batteries.
Here's the underside of the PDC cover showing the description and location of the fuse.
Here's the fuse location with the fuse removed.
Here's the schematic showing the fuse in the circuit.
Unplugging the PCR has always been an alternative to using an N1 N2 fused jumper, both methods defeat the aux battery pass/fail test that occurs prior to a cold start. Unlike using a jumper, unplugging the PCR doesn't require any additional parts, it's just not easy to get to the PCR plug. Removing the F42 fuse accomplishes the same thing as unplugging the PCR, both actions prevent the PCR from activating and separating the batteries.
Here's the underside of the PDC cover showing the description and location of the fuse.
Here's the fuse location with the fuse removed.
Here's the schematic showing the fuse in the circuit.
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