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Old 06 August 2019, 03:54   #11
Country: UK - England
Length: under 3m
Join Date: Jan 2017
Posts: 29
Going round in circles fixing nav light!

this is why these things are frustrating Maybe Iíll just ring Force 4 as it is one of these

acraw is offline   Reply With Quote
Old 10 August 2019, 05:39   #12
Country: UK - England
Town: Leicester
Length: 5m +
Engine: 135hp Mercury
Join Date: Sep 2013
Posts: 866
Originally Posted by jwalker View Post
If you've got high resistance in the cable, you'll read 12v on your meter but the bulb won't be able to draw the required current through the cable. Get the bulb online and then check the voltage, if it's low you've got a wiring problem.
If the wiring is corroded a digital multimeter will show battery(ish) voltage present but insufficient current is able to pass. Had this with my RRC when the in-tank petrol pump stopped working. Corrosion in the wiring harness at the connector was the cause.
I'm given to understand an analogue meter would have shown this up but a digital one won't. Whether that's right or not I don't know.
In my case a 12 volt test bulb with a pin pushed through the insulation revealed the point at which the wire was good.

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