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 Testing the Alternator.
Author Message
Mad Pierre
Level 10 User

Joined: 18 Jun 2004
Posts: 614

Posted: Fri Mar 04, 2005 10:56 am

Right this thing been a pain in the arse. Tested it today

Battery with engine not runnin 12.35 Volts
Battery with engine runnin 12.6 - 12.7 at 1000 rpm
Battery with engine runnin at 1000 rpm with lights and headunit on. 12.0 Shocked
Battery with engine runnin at 1500 rpm. A nice 13.9 Volts.

This sound like a Alt prob. or crappy contact's ?. Or a Crappy Ph2 rust prob Laughing
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Fri Mar 04, 2005 11:02 am

alt's dodgy.

Contacts would be there all the time, also the spike from 12.6 to 14V will not be doing the ECU much good at all.
Mad Pierre
Level 10 User

Joined: 18 Jun 2004
Posts: 614

Posted: Fri Mar 04, 2005 11:30 am

And the Boke who work at Ren said it was fine. Mind you. He is a Gearbox person, and not into all this wiring crap.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Sat Mar 05, 2005 2:50 am

so an alt thats producing 12v at idle then 14V at 1500 is ok? Hes not very clever.

TBH I am surprised its not stalling the engine with that spike to the ECU.

But if you think its fine leave it. I'll say I told you so when something catches fire/melts/blows
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