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 Electrical fault

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garyblake

garyblake

Posts : 3603
Join date : 2011-11-27
Age : 37

Electrical fault Empty
PostSubject: Electrical fault   Electrical fault EmptyFri 29 Aug - 18:51

When I press my window switch or head light my oil pressure gauges drops then go back up ? Boost gauge fine thou


Is this and earth fault ?

Any one one the the main earth points are

Gear box
Fuse box
?
Thanks
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Mick T

Mick T

Posts : 404
Join date : 2012-08-19

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 19:03

Could be a charge fault
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garyblake

garyblake

Posts : 3603
Join date : 2011-11-27
Age : 37

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 19:04

Soz mate don't under stand
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Mick T

Mick T

Posts : 404
Join date : 2012-08-19

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 19:07

If when you use windows or lights. Then there is a massive draw of voltage/ current from battery. If alt or battery is week then when you use either it's dimming gauges as it can't supply enough voltage.
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garyblake

garyblake

Posts : 3603
Join date : 2011-11-27
Age : 37

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 19:12

What the voltage a battery should be when engine running and how do you check an alternater ?

Thanks
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Mick T

Mick T

Posts : 404
Join date : 2012-08-19

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 19:19

With engine running about 13.5 volts. With engine off 12.2 ish. If you have 13 with engine running alt is ok.
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Darren classic

Darren classic

Posts : 358
Join date : 2013-06-16
Age : 48
Location : North Shields

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyFri 29 Aug - 20:16

Mate if u need to check voltage pop over and we ll check it no probs
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Wagon_Deej

Wagon_Deej

Posts : 28
Join date : 2014-07-23
Location : Newcastle

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyTue 2 Sep - 10:21

If it's only the oil pressure gauge that's affected it's probably an issue with the wiring/earth for that gauge. If there was a drop in the battery/charging voltage then everything would be affected.

A quick test with a multimeter will answer that for sure though.
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garyblake

garyblake

Posts : 3603
Join date : 2011-11-27
Age : 37

Electrical fault Empty
PostSubject: Re: Electrical fault   Electrical fault EmptyTue 2 Sep - 15:09

No probs will check wiring thanks

Alternater check all good
Battery check all good
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