Jump to content

Help on electrical problem


Recommended Posts

My tr8 has a problem with the charging system,

 

when driven with the lights off ok

with lights on battery is not charging

and funny thing is after lights off again battery goes bad and will refuse charging till i change to another battery ?

charging is ok as long the lights are never turned on !

 

any ideas on how to solve ?

should i change head light switch ?

 

 

 

thanks

 

Gilberto

Edited by tr8coupe
Link to post
Share on other sites
My tr8 has a problem with the charging system,

 

when driven with the lights off ok

with lights on battery is not charging

and funny thing is after lights off again battery goes bad and will refuse charging till i change to another battery ?

charging is ok as long the lights are never turned on !

 

any ideas on how to solve ?

should i change head light switch ?

thanks

 

Gilberto

 

Hi,

I would suspect that the alternator is at fault, and not capable of supplying enough current to sustain the lights.

This drains the battery voltage to a level where there is not enough to excite the alternator into charging.

The new battery will have 12v and the alternator will behave as normal until the battery voltage falls below the threshold again.

Jim

Link to post
Share on other sites
Hi,

I would suspect that the alternator is at fault, and not capable of supplying enough current to sustain the lights.

This drains the battery voltage to a level where there is not enough to excite the alternator into charging.

The new battery will have 12v and the alternator will behave as normal until the battery voltage falls below the threshold again.

Jim

 

 

thanks Jim

 

alternator is new and tested 14.43 volts puting out but once you put lights on after a short run goes back to

battery voltage 11.99 to 12.45 volts switch off lights and battery will not recuperate neither the alternator will go back to 14.43 volts?

could be a short on elctric motors for the lights ?

 

thanks

 

Gilberto

Link to post
Share on other sites

Hi,

 

I think a visit to an autospark is required.

 

Jim

Link to post
Share on other sites
voltage is nothing without amps, if you have access to an ameter (sp) it may be worth checking how many amps the alternator is pumping out and how many it should be!

 

alternator is brand new and puting out 80 amps

battery is new and i suspect is not taking charging to the max so going to costco as the warrantie still on 3 years

 

this on a 4.8 litre John Eales engine lol

 

thanks

 

Gilberto

Link to post
Share on other sites
Hi Gilberto,

 

Nothing new there, then - like pump, like battery.

 

Bosch is bosh . . .

 

Ruckwarts durch technik !

 

Cheers,

 

Alec

 

thanks Alec on correction lol

last battery cost £90.00 and lasted 10 years

new one 4 months ago cost £25.00 + vat (faulty after only 4 months)

are we going down on price and back on technology as i was told the new batteries have to be fully charged at all times other ways they go bad ?

 

nice thing is costco gives 3 years on them things lol

 

happy

 

tr8ing

Edited by tr8coupe
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please familiarise yourself with our Terms and Conditions. By using this site, you agree to the following: Terms of Use.