red battery/alt' light problem

[Oldiebut goodie]

Might be a 14.2v regulator rather than a 14.5. My 14.5v one puts out 14.3 at the alternator - replacing a 14v one that was giving 13.8v. Same with my boat alternator, there is a 0.2v lower voltage output compared to the marked 14.5.

[jrt]

Evening,will do but not tonight, just piled all my crap back into the boot.
When I checked what I was getting when we bought the van it was the same reading but I will see what I get directly from the alternator.
The bit about the brushes length I got out of my manual, I measured the new ones and they were approx 13mm.
David

[bigherb]

I had a look, new bushes are 13mm and should be replaced when 5mm

That really doesn't sound right!

Martin

Why?

[California Dreamin]

Why?
Because I know that they are longer .... but I can see quoted figures are for the protruding length and not the actual length so it makes sense.
The braided wire prevents the brushes coming all the way out and holds a fair length inside the housing, brushes are a lot longer than 13mm new.


Martin

[bigherb]

Why?
Because I know that they are longer .... but I can see quoted figures are for the protruding length and not the actual length so it makes sense.
The braided wire prevents the brushes coming all the way out and holds a fair length inside the housing, brushes are a lot longer than 13mm new.


Martin

But you always measure the service length from the bottom of the brush box.

[CovKid]

If only it was brush length that was under scrutiny here.

[Sir Brixalot]

My battery light is still on. On starting the van I'm only getting 11.6 from the alternator but when the van is warm and after dipping the accelerator so the revs drop I get 14.2. Is this just a coincidence? I have the 90 Bosch. I changed the brushes a couple of months ago.

[CovKid]

Yes but does the light stay off after revving? If it does, join the club. Mine is the same. You just get into a habit of blipping the thrrottle after starting.

[Sir Brixalot]

No CK, it stays on. Only started recently two blue lines join before the alternator, thought it was bad contact so I put a crimped a new lug onto the alternator.

[dickspanner]

Ok, read this thread with interest as have a constant battery light on dash.

Tried a new alternator, no difference.

Tester on battery showing it is charging.

So wondered what is regulator and where will I find it, is it testable if not are they cheap to replace.

Want this sorting as will not sell crewcab with a fault and it is going on ebay next week.

Cheers

Dickspanner

[CovKid]

If you've replaced alternator, its unlikely to be regulator as its part of alternator (two screws on the back) - unless its a S/H alternator. Check what voltage you get across battery when engine is running. 13.5 - 14v typically.

Possibly poor earth somewhere. Check dash connector on back of clocks.