Tmo

Active Member

• Feb 20, 2013

• #1

Don't think my alternator is charging my battery as when I put multimeter on terminals and run engine batt stays at roughly 11 volts and doesn't increase when run up.

Main brown cable goes from alternator to starter then from starter to battery pos

Any suggestions how I can prove its charging it as batt isn't going flat but I think that's because it's a good battery

 

Mr Noisy

Coming in your ears.

• Feb 21, 2013

• #2

Yeah, maybe try replacing the alternator!

You can get them tested/reconditioned but tbh you can get a decent alternator for 35 these days anyway!

 

discomark10

Well-Known Member

• Feb 21, 2013

• #3

Mr Noisy said:

Yeah, maybe try replacing the alternator!

You can get them tested/reconditioned but tbh you can get a decent alternator for 35 these days anyway!

Click to expand...

where from?

 

Mr Noisy

Coming in your ears.

• Feb 21, 2013

• #4

Euro car parts, ok it was a little while ago but they were selling Lucas cheaper than their own RTX brand!!

 

T

tomsviews

New Member

• Mar 3, 2013

• #5

discomark10 said:

where from?

Click to expand...

Do they still sell them in Tesco?

 

Tmo

Active Member

• Dec 29, 2013

• #6

Does anybody have any links to twin alternator on 3.9 v8 efi setup as it's something I like the idea of?
Just need to know special brackets, pulleys, belt to use etc

 

discomark10

Well-Known Member

• Dec 29, 2013

• #7

I'm very slowly working on a twin alternator setup atm, it depends what front cover type, if its v belt then look at my thread
http://www.landyzone.co.uk/lz/f42/rover-v8-right-hand-second-alternator-bracket-225877.html

not sure if its serpentine, but would be similar.

 

Spunka

New Member

• Dec 29, 2013

• #8

Tmo said:

Don't think my alternator is charging my battery as when I put multimeter on terminals and run engine batt stays at roughly 11 volts and doesn't increase when run up.

Main brown cable goes from alternator to starter then from starter to battery pos

Any suggestions how I can prove its charging it as batt isn't going flat but I think that's because it's a good battery

Click to expand...

You can buy the bits to repair Lucas alts, and there is some good vids on you tube to show how to strip them.
handy to know if you get in mud and water alot even if you do it and keep for a spare

 

Last edited: Dec 29, 2013

zen

Well-Known Member

Events Planner

• Dec 29, 2013

• #9

discomark10 said:

I'm very slowly working on a twin alternator setup atm, it depends what front cover type, if its v belt then look at my thread
http://www.landyzone.co.uk/lz/f42/rover-v8-right-hand-second-alternator-bracket-225877.html

not sure if its serpentine, but would be similar.

Click to expand...

why? just fit p38 alt..`150 amps...

 

zen

Well-Known Member

Events Planner

• Dec 29, 2013

• #10

theres also another reason why two is not so good...i will answer why if you want..but first..

are you running two batts?
if you are why?
if you are, do they run seperate circuits? (winch/engine etc)
what is max load on alternator at moment/

 

Tmo

Active Member

• Dec 30, 2013

• #11

zen said:

theres also another reason why two is not so good...i will answer why if you want..but first..

are you running two batts?
if you are why?
if you are, do they run seperate circuits? (winch/engine etc)
what is max load on alternator at moment/

Click to expand...

Yes I will have an engine battery and a lighting / winch battery for ancillaries etc
They will run separate circuits but I wanted to look at a split charge system but don't know much about them
Don't know exact amount in amps I guess it would be normal draw of an efi system

 

Tmo

Active Member

• Jan 5, 2014

• #12

Can anybody tell me what each connection does please?

I know big brown is to starter motor what are the rest?

 

discomark10

Well-Known Member

• Jan 6, 2014

• #13

Big brown is for battery via starter. Smal brown is dash battery light to provide 12v fornstarting the alternator and the white issspeedo

 

zen

Well-Known Member

Events Planner

• Jan 7, 2014

• #14

not speedo..tacho...but may be other way around...ie brown tacho..blue looks like to condensor (capacitor to stop whine on radio)

 

discomark10

Well-Known Member

• Jan 7, 2014

• #15

Ops yea ment taco (rev) small brown is defo battery light.

 

Tmo

Active Member

• Jan 7, 2014

• #16

Thanks very much gents would explain why alternator isn't charging only big brown connected other 2 rammed and hidden down some copex trunking!