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SouthArk370Z · 10-19-2014, 08:18 PM

I suggest one or more of the following:
*Check all wiring and connectors in the starting system. The FSM has everything you need to know about wire colors (check the key; the abbrevs they use for colors aren't always obvious), harness routing, connector pinouts, and much, much more. My guess is that this is where the problem is.
*Log voltage and see if any anomalies show up. It doesn't really sound like it's the alternator from your descriptions but it's worth looking at.
*Check parasitic load. IIRC, expected/acceptable figures are in the FSM (I can't remember what it's supposed to be but I'm certain it is greater than zero). Might need to log this to see problems.

Edit: It sounds a lot like you have an intermittent electrical problem. These can be a royal PITA and, because of the come-and-go nature, can give very misleading clues (eg, replace battery and car starts, even though a bad electrical connection was the problem).

The problem could also be in the IPDM-E/R. A dealer will have to check that and they may not be able to diagnose an intermittent.

10-19-2014, 08:18 PM	#27 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	I suggest one or more of the following: Check all wiring and connectors in the starting system. The FSM has everything you need to know about wire colors (check the key; the abbrevs they use for colors aren't always obvious), harness routing, connector pinouts, and much, much more. My guess* is that this is where the problem is. Log voltage and see if any anomalies show up. It doesn't really sound like it's the alternator from your descriptions but it's worth looking at. Check parasitic load. IIRC, expected/acceptable figures are in the FSM (I can't remember what it's supposed to be but I'm certain it is greater than zero). Might need to log this to see problems. Edit: It sounds a lot like you have an intermittent electrical problem. These can be a royal PITA and, because of the come-and-go nature, can give very misleading clues (eg, replace battery and car starts, even though a bad electrical connection was the problem). The problem could also be in the IPDM-E/R. A dealer will have to check that and they may not be able to diagnose an intermittent. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma Last edited by SouthArk370Z; 10-19-2014 at 08:25 PM.