Hi
Short Story :
No charge to battery
Alternator warning light on
Water in Fuel warning light permanently on (even when unplugging sensor)
Alternator Loom connectors look good - no corrosion / visible damage
Battery 12.7 volts at rest / 11.97 with engine running
Alternator signal feed wire (yellow / black) = 1.9v
Whats next - trace for broken alternator signal wire???
Long Story
First post , for my first Nissan... Just bought it, thinking probs needed a new alternator or reg/rec etc .. had a look online and probs not so simple! Optimism trumps experience and good judgement (again...)
I found a few posts on here with similar story , multiple warning lights + no charge from alternator , cause being that signal voltage needed to trigger the alternator to charge coming from same circuit as the dashboard warning lights, hence the faulty warning lights behaviour.
Thought I would tackle the Water in Fuel warning first , after pointlessly draining the (recent looking) fuel filter , and realising that unplugging the fuel / water sensor should make the warning light turn off... brought me here!
Any tips on how to trace the fault?
tested so far:
Fuel Water sensor is good - also tried disconnected
Battery to Alternator voltage good (battery volts same as the volts on the big cable to nut on Alternator)
Battery to Alternator Loom - engine running :
Yellow / Black - 1.9v
Yellow / Red - 11.9v ...
Ran out of light / brains pretty quick, so any advice appreciated !! The Mrs is pissed at buying another truck ... this aint helping win her over haha
Short Story :
No charge to battery
Alternator warning light on
Water in Fuel warning light permanently on (even when unplugging sensor)
Alternator Loom connectors look good - no corrosion / visible damage
Battery 12.7 volts at rest / 11.97 with engine running
Alternator signal feed wire (yellow / black) = 1.9v
Whats next - trace for broken alternator signal wire???
Long Story
First post , for my first Nissan... Just bought it, thinking probs needed a new alternator or reg/rec etc .. had a look online and probs not so simple! Optimism trumps experience and good judgement (again...)
I found a few posts on here with similar story , multiple warning lights + no charge from alternator , cause being that signal voltage needed to trigger the alternator to charge coming from same circuit as the dashboard warning lights, hence the faulty warning lights behaviour.
Thought I would tackle the Water in Fuel warning first , after pointlessly draining the (recent looking) fuel filter , and realising that unplugging the fuel / water sensor should make the warning light turn off... brought me here!
Any tips on how to trace the fault?
tested so far:
Fuel Water sensor is good - also tried disconnected
Battery to Alternator voltage good (battery volts same as the volts on the big cable to nut on Alternator)
Battery to Alternator Loom - engine running :
Yellow / Black - 1.9v
Yellow / Red - 11.9v ...
Ran out of light / brains pretty quick, so any advice appreciated !! The Mrs is pissed at buying another truck ... this aint helping win her over haha