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| parasite battery drain https://www.ausmini.com/forums/viewtopic.php?f=2&t=101387 |
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| Author: | auster3 [ Tue Jun 14, 2022 11:04 am ] |
| Post subject: | parasite battery drain |
I have a 1972 Clubman with Lucas ACR15 internally regulated alternator. Recently i left the car in a garage for 3 weeks and the battery went dead flat. The only non standard item drawing current is a cd player which has a yellow "hot all the time" wire to power the cd player clock, memory etc. I suspected some parasite current drain and found a 40-50mA discharge. Taking the fuses out was unhelpful so I disconnected the power lead from the alternator. Battery drain dropped to 8mA, a more realistic figure for a cd clock. So I surmise that there is an internal fault in the alternator. Does anyone have experience of such things? Is it a crook diode? Is there an easy fix? Auster3 |
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| Author: | Steam [ Tue Jun 14, 2022 6:43 pm ] |
| Post subject: | Re: parasite battery drain |
It could well be a diode failing in the regulator or a transistor . The internal regulators for the 15 / 16 ac are becoming hard to get. I replaced the whole alternator with a 17 acr which also has the benefit of greater output as well as readily available parts. |
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| Author: | drmini in aust [ Wed Jun 15, 2022 11:16 am ] |
| Post subject: | Re: parasite battery drain |
I had the same problem, a NOS UK made alternator I bought 20 years ago fixed it. New alternators are so cheap it's not worth fixing old, unless it's a real S... |
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