 electrical system nightmare, alternator is drawing power. |
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| vincesix |
 Sep 17 2005, 10:24 AM
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Newbie  Group: Members Posts: 38 Joined: 20-December 04 From: Riverside,CA Member No.: 3,313  |
I need some Help. I just completed my 2.7 carburated conversion on my 73 914. The engine is a 2.4 case. I have installed a valleo internally regulated alternator bought from world pac. the b+ lead is connected to the starter battery wire. The d- lead is connected to the ground. The d+ lead is connected to the relay board in the engine compartment lead that goes to the alternator light then to the key switch. The first go with this it was discorverd that the alternator was bad. so A & A alternator in Riverside rebuildt it. When i picked it up they stated that this alternator had been modified from external to internal regulated. After the rebuild I have a dead battery every time the car sits. the D+ lead is hot when every thing is off and now the fule pump runs intermitentlly when every thing is off.
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| Cap'n Krusty |
Sep 17 2005, 10:56 AM
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
RTFM! Again, for like the ten thousandth time, the D+ gets its power from the ignition switch THROUGH the pilot light on the dash, the one labeled "G". If it gets power from ANYWHERE ELSE, it's not gonna work right. When the ignition's on, the alternator grounds the circuit and the light is lit. When the key's off, the circuit is dead. When the alternator RPM passes the threshold speed, the ground goes away and the system is charging. If those conditions aren't met, the alternator won't produce current, and the battery may well lose its charge. This is BASIC and FUNDAMENTAL automotive charging system technology, NOT rocket science. The fact that the wire's hot with the key off indicates a fundamental defect in the way the car is wired, or possibly a bad alternator. Disconnect the D+ wire somewhere in the line and see if there's voltage on the side from the switch. If there is, then you have a wiring problem. If not, check the side connected to the alternator. If there's voltage there, the alternator is bad, or there's voltage coming in through a short circuit.
It's been a long time since I got a bad alternator from Bosch (and Worldpac), but they DO offer a warranty on their products, and I've had 35 years of spotty work from a ton of local "rebuilders". Bosch reworks older Bosch, Valeo, and Marelli alternators for internal regulators. That doesn't mean it's automatically a bad thing. Cap'n Krusty out! 10-10, 10-51. |
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Posts in this topic
vincesix electrical system nightmare Sep 17 2005, 10:24 AM
! Test the battery after it's fully charged, at ... Sep 17 2005, 10:45 AM vincesix their is a MSD6A. No one way diode. Will the MSD p... Sep 17 2005, 02:49 PM ! Try this..... Sep 17 2005, 02:59 PM ! and this.... Sep 17 2005, 03:01 PM
lapuwali A nit:
When the alternator is operating, the D+/G... Sep 17 2005, 03:23 PM |
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