davy crockett
Member
I thought I lucked out, my factory alternator was on the way out and I got my hands on a 200 amp alternator out of a 2010 Crown Vic Police Interceptor. Everything looked like a match except for the charge terminal and regulator plug locations being swapped.
I installed the new alternator but I got a check charging system error right away and the battery light was on. I scanned the truck and got a code of P0620. The alternator is charging but only at around 13 - 13.5 volts.
I tried a second known good cop car alternator and it does the same thing so the alternator isn't the issue. I know these trucks use the PCM to control the alternator operation and the code indicates a interaction fault between the PCM and the alternator so I'm suspecting for whatever reason the PCM doesn't like some feedback it is getting from the alternator. I have updated the PCM to the latest calibration as per Ford's TSB # 04-14-9 but no luck.
I like the factory 200 amp alternators because they are a solid piece and so many of the aftermarket ones are junk. With some of the upgrades I have planned for the truck (dual batteries, inverter, winch, audio system, lighting, etc) the extra capacity would be nice to have.
I'm hoping someone might have a more in depth knowledge of how the system works and if there is a way to make this swap work properly.
I installed the new alternator but I got a check charging system error right away and the battery light was on. I scanned the truck and got a code of P0620. The alternator is charging but only at around 13 - 13.5 volts.
I tried a second known good cop car alternator and it does the same thing so the alternator isn't the issue. I know these trucks use the PCM to control the alternator operation and the code indicates a interaction fault between the PCM and the alternator so I'm suspecting for whatever reason the PCM doesn't like some feedback it is getting from the alternator. I have updated the PCM to the latest calibration as per Ford's TSB # 04-14-9 but no luck.
I like the factory 200 amp alternators because they are a solid piece and so many of the aftermarket ones are junk. With some of the upgrades I have planned for the truck (dual batteries, inverter, winch, audio system, lighting, etc) the extra capacity would be nice to have.
I'm hoping someone might have a more in depth knowledge of how the system works and if there is a way to make this swap work properly.