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440 Alternator #1429830 05/03/13 08:19 PM 05/03/13 08:19 PM
Joined: Feb 2004 Posts: 788 middle of the country A aar1 OP super stock
aar1 OP super stock A Joined: Feb 2004 Posts: 788 middle of the country	1970 Cuda, 440 auto, A/C, 4-bbl.... if the car is running, should it stay running if you disconnect the battery? My car dies when I try it and the alternator supposedly checks out fine. Thoughts? Thanks!!

Re: 440 Alternator [Re: aar1] #1429831 05/03/13 08:27 PM 05/03/13 08:27 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Thoughts? Yes if the alt is putting out it would say running but it ain't recommended to check it that way as is stresses the alt (I believe). Since the alt checked out Ok I'd check the field circuit/connections for continuity/power & the reg also as needed. Need switched 12V to one field (blue wire) then continuity in/thru/out the other brush assy then the green wire to the reg & the reg grounds it as needed thru the case to ground. live every 24 hour block of time like it's your last day on earth

Re: 440 Alternator [Re: RapidRobert] #1429832 05/03/13 08:33 PM 05/03/13 08:33 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Yup should run. If it's not, check the voltage regulator and follow the wires. May just be a broken wire somewhere.

Re: 440 Alternator [Re: DaytonaTurbo] #1429833 05/03/13 09:20 PM 05/03/13 09:20 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	A better (and simple) test of the charging system is to fast idle the engine and check voltage at the battery. It should be over 13V and best is 13.5 to 14.3 or so. If its under 13 volts the charging system is not working properly. At slow idle voltage may drop as alternator output drops way off at low revs. With low idle output of the standard alternator, the pull off the cable test may give false results... plus its really hard on any electronics like the ignition module.

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