What have I done this time?
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Many moons ago I replaced my wiring loom and had it checked out by an auto electrician. He adjusted the wiring so that I could run an alternator.
The car has been running fine ever since and all of the electrics are working fine - However - I was worried about the battery life and put a volt meter between the battery cable (by the solenoid) and earth and found that the alternator is providing a negative voltage.
I reversed the wiring on the gauge and it produces 12.5 volts
What on Earth have I done (pun intended)
Any clues would be gratefully appreciated as am clueless on electrics.
Many thanks in advance
Gavin
The car has been running fine ever since and all of the electrics are working fine - However - I was worried about the battery life and put a volt meter between the battery cable (by the solenoid) and earth and found that the alternator is providing a negative voltage.
I reversed the wiring on the gauge and it produces 12.5 volts
What on Earth have I done (pun intended)
Any clues would be gratefully appreciated as am clueless on electrics.
Many thanks in advance
Gavin
One day I'll actually finish - completely - one day....
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gav - Fourth Gear
- Posts: 524
- Joined: 26 Jan 2004
Hi Gavin
If everything is working fine then you dont really have a problem. The volt meter reading at 12.5V ( irrespective of which polarity you connect it) is correct in value I suspect that it is simply a case that the +ve and -ve terminals are swapped over so the polarity appears wrong.
regards
Bob
If everything is working fine then you dont really have a problem. The volt meter reading at 12.5V ( irrespective of which polarity you connect it) is correct in value I suspect that it is simply a case that the +ve and -ve terminals are swapped over so the polarity appears wrong.
regards
Bob
- bob_rich
- Fourth Gear
- Posts: 564
- Joined: 06 Aug 2009
Hi Bob
Just been out to check again. It is possible that I misread the wiring positions on the gauge - without the engine running and the gauge correctly wired up (!), I have 13.5 volts with no electrics running.
I'll check it again with the engine running but this might just be a case of me needing new glasses !
Heres hoping.
Thanks
Gavin
Just been out to check again. It is possible that I misread the wiring positions on the gauge - without the engine running and the gauge correctly wired up (!), I have 13.5 volts with no electrics running.
I'll check it again with the engine running but this might just be a case of me needing new glasses !
Heres hoping.
Thanks
Gavin
One day I'll actually finish - completely - one day....
-
gav - Fourth Gear
- Posts: 524
- Joined: 26 Jan 2004
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