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Ask Derek Werner Your Own Question
Derek Werner
Derek Werner, Dodge Technician
Category: Dodge
Satisfied Customers: 137
Experience:  ASE Master Technician, L1 Advanced level specialist
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We are having charging issues on a 2000 dodge durango 5.2l.

Customer Question

we are having charging issues on a 2000 dodge durango 5.2l. There alternator doesn't carge but if we jumper from B+ to the pdc to the wht/dblu it starts to charge. any idea? when the jumper isn't installed the pcm gives me 2 error codes P0753 and P1765. which are both transmission codes. What does one have to do with the other. When we jumper the B+ to the PDC the codes go away.
Submitted: 1 year ago.
Category: Dodge
Expert:  Derek Werner replied 1 year ago.

hello and welcome!

You should have battery voltage on the wt/db wire at the alternator. This Circuit supply's power to the Transmission relay also. Check fuse #1 20 amp, in the power distribution center for a open.

Expert:  Derek Werner replied 1 year ago.

The Wt/db wire is the power supply for the alternator regulator.

Customer: replied 1 year ago.
Checked all fuses and relays and they are fine. Now we have checked continuity of the wht/db wire at pcm,alternator and pdc and there is continuity all the way thru but no power. What we still can't figure out is why with the jumper from B+ to wht/db on pdc the system charges and we get voltage to the transmission relay. But when removed we are back at square one. Now we have a hunch that there may be a problem in the pcm. Now is the pcm powered by the pdc or vise a versa?
Expert:  Derek Werner replied 1 year ago.

The pdc sends battery voltage to the pcm and alternators internal regulator. Are you checking continuity with a ohm meter? You can still have high resistance in a wire but it will ohm test good. The best way to check a power circuit is with a test light. Using a test light puts a load on the wire and will not light up bright if high resistance is in the circuit. Using a test light does it light up when you test power on the fuse #1. Fuse #1 should always have battery voltage and is not controlled by the pcm.

  • The next step is to test for power out of the pdc, with a test light At the red/white wire, circuit 16. It looks this can be checked at connector C106 pin 13. C106 is located at the top of the pdc check for power here at pin13 red/white wire.