Alternator issues

[kurtiswilk]

Alternator issues

Hey All, Looking for some advice on an alternator issue.
I've got the Battery and Water light coming on pretty faintly when above idle.
I've done some test and have attached the results.
I haven't done a voltage drop test yet but its on the list.
Connections seem to be fine but they are also on the list to recheck.

The Alternator is roughly 20k old, was supposed to be brand new when vehicle was purchased.

Thanks in advance

alternator.PNG (11.46 KiB) Viewed 2291 times

[FalcoColumbarius]

Terminals can look relatively clean yet still have a thin layer of corrosion on them, enough to inhibit the charging process.
I would clean both the terminals and the cable ends, slather some dielectric grease on the terminals and the cable ends, put them back together and take her for a drive up the highway and recheck.

In my experience I've discovered that starting simple cures most of the problems that I've come up against. Why am I losing power and getting poor fuel economy? Check the air filter, check the tyre pressure. Alternator issues? Clean the terminals, especially this time of year when the weather shifts into wet mode.

Or maybe it's the alternator ~ but I start simple.

Falco.

[Doug Colson]

It is odd that your voltages drop when rpm increases. I had a problem with that and engine temps would rise when heading up hill. Applying more fuel. The problem was a split harmonic balancer. The rubber between the two metal rings had splits. As I applied fuel the engine would speed up but the rings would slip around each other. The pump speed would drop or stay relatively the same but as the engine was working harder the temp would rise. The same with the alternator.
This may be something to look at.
Good luck.


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